Alternatives to Koi Editor
Compare Koi Editor alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to Koi Editor in 2026. Compare features, ratings, user reviews, pricing, and more from Koi Editor competitors and alternatives in order to make an informed decision for your business.
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1
UltraEdit
IDM Computer Solutions
UltraEdit is a text and code editor built for work that general-purpose editors often struggle with: large files, complex data manipulation, and security-sensitive workflows. It has been in the market for more than 30 years, is used by over 4 million users worldwide, and is trusted by enterprise customers across the Fortune 100, 500, and 1000. Individual users choose UltraEdit when everyday editors start to hit their limits. Common use cases include working with very large files, running advanced search and replace, using column and block editing, and handling more complex text and data manipulation. Organizations choose UltraEdit when they need a more secure and supportable editor behind sensitive workflows. That includes teams in banking, insurance, healthcare, government, and other regulated or risk-sensitive environments where unsupported tools can create too much uncertainty. -
2
Caret
Caret
Based on the amazing Ace editing component, Caret brings professional-strength text editing to Chrome OS. With Caret, you no longer need to install a second OS to get what other platforms take for granted: a serious editor for local files, aimed at working programmers. Caret offers syntax highlighting for a wide variety of languages, and all of the standard themes that come with Ace, including emulations of coloring from other editors like Eclipse, XCode, and the Chrome Dev Tools. Once you've gotten used to making many changes with just a keystroke or two, it's hard to go back to just one cursor. Caret offers multiple cursors and selections, and support for Sublime keybindings like Ctrl-D (select next match). Why bother learning keyboard shortcuts? With the command palette (Ctrl-Shift-P), you can just start typing what you want, Caret will fuzzy-search the menu configuration, find the command you want, and execute it for you. You never need to touch the mouse again. -
3
Kakoune
Kakoune
Kakoune is a highly efficient, modal text editor that focuses on real-time feedback and powerful, intuitive multi-selection capabilities. Inspired by Vim but offering its own distinct approach to modal editing, Kakoune prioritizes a selection-based workflow that makes text manipulation feel natural and fluid. Instead of commands operating on cursors, commands operate on selections, allowing users to edit and navigate with precision and speed. Kakoune features robust multi-caret editing, context-aware autocompletion, and extensive language support, with performance optimized for working with large files and complex codebases. Designed to be scriptable and extendable with shell commands, Kakoune integrates smoothly with UNIX tools, giving users flexibility in customization. Known for its responsiveness and adaptability, Kakoune is ideal for developers who prefer a keyboard-driven interface and appreciate real-time, immediate feedback in their editing workflow.Starting Price: Free -
4
Code Browser
Code Browser
Code Browser is a folding text editor for Linux and Windows, designed to hierarchically structure any kind of text file and especially source code. It makes navigation through source code faster and easier. Code Browser is especially designed to keep a good overview of the code of large projects, but is also useful for a simple CSS file. Ideal if you are fed up of having to scroll through thousands of lines of code. It supports syntax highlighting for all major languages and custom syntax highlighting can also be added. Although Code Browser was initially designed to edit programs, it can also be used for different tasks such as plain text outlining or helping to understand existing source code. I've added a page with suggestions to take advantage of folding. -
5
Void Editor
Void Editor
Void is an open source AI code editor and Cursor alternative built as a fork of VS Code, enabling developers to write code with advanced AI assistance while retaining full control over their data. It supports seamless integration with any large language model, such as DeepSeek, Llama, Qwen, Gemini, Claude, and Grok, connecting directly without routing through a private backend. Core features include tab‑triggered autocomplete, inline quick edit, and a versatile AI chat interface offering normal chat, a restricted gather mode for read/search-only tasks, and an agent mode that automates file and folder operations, terminal commands, and MCP tool access. Void delivers high‑performance operations, including fast apply on files with thousands of lines, alongside checkpoint management for model updates, native tool execution, and lint error detection. Developers can transfer all themes, keybindings, and settings from VS Code in one click and host models locally or via the cloud.Starting Price: Free -
6
Helix Editor
Helix Editor
Helix Editor is a powerful, modern text editor designed for developers seeking a fast, customizable, and efficient editing experience. Built with a focus on productivity, Helix uses a modal editing style inspired by Vim, which allows users to navigate, select, and manipulate text seamlessly through intuitive keyboard shortcuts. It offers a robust set of features including syntax highlighting, multi-caret editing, and support for languages like Rust, Python, and JavaScript. Helix also integrates with the Tree-sitter parsing library for precise syntax-aware editing, making it easier to work with complex code structures. With a minimal interface and a strong focus on performance, Helix Editor provides an ideal environment for programmers who prioritize speed and flexibility in their development workflow.Starting Price: Free -
7
Rune IDE
Rune IDE
Rune is a fast, keyboard-driven IDE for power users that brings code, terminals, CLI tools, language intelligence, debugging, and AI agents into one composable, multi-workspace environment. Built around the Unix way, it keeps powerful development tools close together without forcing developers into a mouse-heavy workflow. Rune ships with three built-in editing modes, a standard editor for users coming from VS Code, Cursor, or Sublime; modal editing for Vim and Neovim users; and an Emacs-style editor, with keybindings applied throughout the interface. Workspaces combine files, terminals, tasks, debugging, search, and language intelligence, and can run locally or on remote machines. Rune Agent lives in the same workspace as the code, where it can read and edit files, search the codebase, run commands, use tools, and maintain full conversations. It supports OpenAI, Codex, Anthropic, Claude, Gemini, Amazon Bedrock, local models, and custom OpenAI-compatible endpoints.Starting Price: $10 per month -
8
CudaText
CudaText
CudaText is a cross-platform text editor, written in Object Pascal. It is open source project and can be used free of charge, even for business. It starts quite fast on Linux on CPU Intel Core i3 3GHz. It is extensible by Python add-ons, plugins, linters, code tree parsers, external tools. Syntax parser is feature-rich, from EControl engine. Syntax highlight for lot of languages (270+ lexers). Code tree structure of functions/classes/etc, if lexer allows it. Code folding, multi-carets and multi-selections. Find/Replace with regular expressions. Configs in JSON format. Including lexer-specific configs. Tabbed UI, with a split view to primary/secondary, and a split window to 2/3/4/6 groups of tabs. Command palette, with fuzzy matching, minimap, and micromap. Shows unprinted whitespace and offers support for many encodings. Customizable hotkeys. Binary/Hex viewer for files of unlimited size (can show 10 Gb logs). -
9
CodeRunner
CodeRunner
A lightweight, multi-language programming text editor and IDE for macOS. CodeRunner was designed to support all of the most widely used programming languages and run them instantly. The app is configured to run code in 25 languages out-of-the-box, and additional languages can be configured to run by simply entering their terminal command. With over 200 syntax modes, lots of advanced editing features and thoughtful details, CodeRunner will quickly become your go-to editor for any and all kinds of text files. CodeRunner's code completion is the best you'll find in any IDE. Intelligent matching of typed text enables completions beyond single words. Quickly find the right completion among thousands with the extra-fuzzy search algorithm, helpful documentation snippets, and smart ranking of results. Don't clutter your code with print-statements for debugging. Instead, use CodeRunner's built-in debugging features to set breakpoints and step through your code.Starting Price: $19.99 one-time payment -
10
ConTEXT Editor
ConTEXT Editor
ConTEXT is small, fast and powerful text editor for software developers. Unlimited open files, unlimited editing file size length, powerful syntax highlighting for C/C++, Delphi/Pascal, 80x86 assembler, Java, Java Script, Visual Basic, Perl/CGI, HTML, SQL, Python, PHP, Tcl/Tk, user definable syntax highlighter, project workspaces, compiler integration, multi-language support and many more features.Starting Price: $0 -
11
GoCoEdit
Gogolith
GoCoEdit is a code and text editor optimized for fast opening and editing of local (on iOS device) and remote (on server) files with your iOS device. It supports advanced syntax highlighting for many programming languages and has a stylish interface with many dark and light themes. One app fits all. Buy once and use GoCoEdit on all your iOS devices. It's universal! (iPad, iPhone, iPod Touch) BY THE WAY! That's not all. Some features of GoCoEdit can be extended by yourself.Starting Price: $8.99 -
12
Brackets
Brackets
With focused visual tools and preprocessor support, Brackets is a modern text editor that makes it easy to design in the browser. It's crafted from the ground up for web designers and front-end developers. Brackets is a lightweight, yet powerful, modern text editor. We blend visual tools into the editor so you get the right amount of help when you want it without getting in the way of your creative process. You'll enjoy writing code in Brackets. Brackets is an open-source project, supported by an active and passionate community. It's made by other web developers like you! Instead of jumping between file tabs, Brackets lets you open a window into the code you care about most. Want to work on the CSS that applies to a specific ID? Put your mouse cursor on that ID, push Command / Ctrl+E and Brackets will show you all the CSS selectors with that ID in an inline window so you can work on your code side-by-side without any popups. -
13
Quiver
Quiver
Quiver is a notebook built for programmers. It lets you easily mix text, code, Markdown and LaTeX within one note, edit code with an awesome code editor, live preview Markdown and LaTeX, and find any note instantly via the full-text search. A note in Quiver is comprised of cells, snippets of text, code, Markdown, LaTeX (via MathJax) or diagrams (sequence diagram, flowchart). You can freely mix different cell types within one note. You can set different languages for different code cells, too. The programmer's notebook should make code editing effortless. Quiver packs the awesome ACE code editor in code cells, with syntax highlighting support for more than 120 languages, over 20 themes, automatic indent and outdent, and much more. Quiver lets you write in Markdown with inline formatting and custom CSS options. A live preview window renders Markdown as you type. Quiver uses MathJax to typeset mathematical equations written in LaTeX. -
14
QuickEdit
QuickEdit
QuickEdit is fast, stable and full featured text editor for Android. It is optimized for both phone and tablet! Enhanced notepad application with numerous improvements. Code editor and syntax highlight for 40+ languages. High performance and real time feedback on large text files (more than 10,000 lines). Undo and redo modifications without limit. Display, increase and decrease line indents. Smooth scroll in both vertical and horizontal direction. Directly go to a specified line number. Automatically detect character encoding. Preview html and markdown files. Be able to edit system files for rooted devices. Open file from recent opened and added files. Support both light and dark theme. Optimized for both phone and tablet. -
15
Lapce
Lapdev
Lapce is a cutting-edge, open-source code editor focused on delivering a fast and responsive experience, particularly for developers working with large projects or complex codebases. Written in Rust, Lapce leverages the performance advantages of native development to provide a smooth editing experience with minimal lag. It features a clean, modern interface and advanced functionality such as multi-caret editing, split views, and integrated terminal support. With built-in support for the Language Server Protocol (LSP), Lapce offers precise autocompletion, syntax highlighting, and code navigation across various programming languages, enhancing productivity. Its extensibility, support for plugins, and focus on performance make Lapce ideal for developers looking for a lightweight yet powerful editor that balances simplicity with capability, appealing to both beginners and seasoned professionals.Starting Price: Free -
16
Sublime Text
Sublime HQ
A sophisticated text editor for code, markup and prose. Use Goto Anything to open files with only a few keystrokes, and instantly jump to symbols, lines or words. Make ten changes at the same time, not one change ten times. Multiple selections allow you to interactively change many lines at once, rename variables with ease, and manipulate files faster than ever. The Command Palette holds infrequently used functionality, like sorting, changing the syntax and changing the indentation settings. With just a few keystrokes, you can search for what you want, without ever having to navigate through the menus or remember obscure key bindings. Sublime Text has a powerful, Python API that allows plugins to augment built-in functionality. Package Control can be installed via the command palette, providing simple access to thousands of packages built by the community.Starting Price: $80 one-time fee -
17
Pulsar
Pulsar-Edit
A community-led hyper-hackable text editor. Pulsar works across operating systems. Use it on OS X, Windows, or Linux. Search and install new packages or create your own right from Pulsar. Pulsar helps you write code faster with a smart and flexible autocomplete. Easily browse and open a single file, a whole project, or multiple projects in one window. Split your Pulsar interface into multiple panes to compare and edit code across files. Find, preview, and replace text as you type in a file or across all your projects.Starting Price: Free -
18
CotEditor
CotEditor
CotEditor is exactly made for macOS. It looks and behaves just as macOS applications should. CotEditor launches so quick that you can write your text immediately when you want to. CotEditor is developed as an open-source project that allows anyone to contribute. Colorize more than 50 pre-installed major languages like HTML, PHP, Python, Ruby or Markdown. You can also create your own settings. Split a window into multiple panes to see different parts of your document at the same time. Inspect Unicode character data of each selected character in your document and display them in a popover. There are no complex configuration files that require geek knowledge. You can access all your settings including syntax definitions and themes from a standard preferences window. You don't need to lose your unsaved data anymore. CotEditor backups your documents automatically while editing. Check and list-up the characters in your document that cannot convert into the desired encoding. -
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EditPad Pro
EditPad
EditPad Pro is a powerful and versatile text editor or word processor. Designed to make text editing as convenient as possible, using EditPad Pro to edit text files will save you a lot of time and frustration. You can make EditPad Pro as small as you like, and hide its toolbar, status bar, and side panels. There are a great number of text editors available. Some editors offer limited functionality. This makes them easy to use, but more complex editing tasks are quite tedious. Other text editors claim to be powerful, offering every possible feature the developers could think of. You can do many things with those editors, but their complexity will hinder you. Convenience was and is our number one design goal when developing EditPad Pro. We want to offer you a text editor that takes the drudgery out of text editing. With EditPad Pro you can focus on the goals you want to achieve, rather than on the oddities of your text editing tool.Starting Price: $59.95 one-time payment -
20
OllaCoder
OllaCoder
OllaCoder is a private AI coding assistant for VS Code, built for engineers who refuse to ship their source code to someone else’s server. It runs locally, works with your own Ollama models, and brings agent mode, inline edits, codebase chat, smart autocomplete, MCP servers, and a local-first runtime into one editor. OllaCoder is built on the idea that software is a private craft: your code should stay yours, and an AI assistant should be powerful, honest, and silent. By default, it talks to your local Ollama instance, so prompts, completions, and edits stay on your computer; cloud providers are strictly opt-in, and API keys live encrypted in the OS keychain. Its agent mode can plan tasks, edit files, run the terminal, and verify its own work, with every step available for approval, denial, or rollback. Inline edits let users highlight a function, describe the change, and review a real diff hunk by hunk.Starting Price: Free -
21
Buffer Editor
Buffer Editor
Buffer Editor is a powerful code and text editor that lets you easily develop software, view code or take notes on the go. Join thousands of coders who trust Buffer Editor for fast, powerful, and advanced code editing on mobile devices. Preview any files supported by iOS including images, PDFs, movies and documents. Quickly switch between your open files. Open multiple terminals in tabs. Preview on localhost or on your server.Starting Price: $9.99 one-time payment -
22
Vim
Vim
Vim is a highly configurable text editor built for creating and changing any kind of text efficiently. It is included as "vi" with most UNIX systems and with Apple OS X. Vim is rock stable and is continuously being developed to become even better. Vim is persistent, multi-level, with an extensive plugin system, support for hundreds of programming languages and file formats, powerful search and replace feature, and it integrates with many tools. Vim online is a central place for the Vim community to store useful Vim tips and tools. Vim has a scripting language that allows for plugin like extensions to enable IDE behavior, syntax highlighting, colorization as well as other advanced features. These scripts can be uploaded and maintained using Vim online. Vim stands for Vi IMproved. It used to be Vi IMitation, but there are so many improvements that a name change was appropriate. Vim is a text editor which includes almost all the commands from the Unix program "Vi".Starting Price: Free -
23
jEdit
jEdit
jEdit is a mature programmer's text editor with hundreds (counting the time developing plugins) of person-years of development behind it. While jEdit beats many expensive development tools for features and ease of use, it is released as free software with full source code, provided under the terms of the GPL 2.0. Built-in macro language; extensible plugin architecture. Hundreds of macros and plugins available. Plugins can be downloaded and installed from within jEdit using the "plugin manager" feature. Supports a large number of character encodings including UTF8 and Unicode. Highly configurable and customizable. Every other feature, both basic and advanced, you would expect to find in a text editor. -
24
Textastic
Textastic
Textastic for Mac is the perfect desktop companion to the popular iOS code editor. With support for more than 80 source code and markup languages, Textastic brings the powerful syntax coloring engine of the iOS source code editor to the Mac. You can use your own TextMate, and Sublime Text, compatible syntax definitions. Textastic for Mac is based on the code editor that powers the iOS app. It uses native macOS APIs like Core Text for maximum speed. Code completion, file navigation with the symbol list and support for modern Mac features like Auto Save and Versions make your life easier. With iCloud Drive, you can sync your files across your macOS and iOS devices with ease. The app packs in support for 80 source code and markup languages, iCloud auto-save and macOS Versions. Built with the ability to import syntax definitions, themes and templates from TextMate.Starting Price: $7.99 one-time payment -
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EditPad Lite
EditPad
EditPad Lite is a compact general-purpose text editor. Use EditPad Lite to easily edit any kind of plain text file. EditPad Lite has all the essential features to make text editing a breeze. Large file and long line support. Full Unicode support, including complex scripts and right-to-left scripts. Direct editing of text files using Windows, Unix, and Mac text encodings (code pages) and line breaks. Tabbed interface for working with many files. Unlimited undo and redo for all open files, even after saving. Automatic backup and working copies prevent data loss. Powerful search-and-replace with literal search terms and regular expressions that can span multiple lines. EditPad Lite is free for personal use. Business and government users can purchase a license. If you use EditPad Lite at home or at school for purposes that don’t generate money, you can download the free version of EditPad Lite without any kind of payment or registration.Starting Price: Free -
26
Typelets
Typelets
Typelets' online editor enhances productivity with seamless cloud-based file editing and generative AI. Discover the power of seamless cloud-based editing with our generative AI, designed to boost your productivity and enhance your collaboration experience. Ask questions about your documents with integrated generative AI. Edit documents with a robust and feature-rich online text editor. Experience a fast and responsive editor, optimized for performance. Light and dark mode for better user experience. Chats are saved per project for better organization. Easily import PDFs and ask questions about your PDFs. -
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nano
nano
GNU nano was designed to be a free replacement for the Pico text editor, part of the Pine email suite from The University of Washington. It aimed to "emulate Pico as closely as is reasonable and then include extra functionality". The Debian GNU/Linux distribution, known for its strict standards in distributing truly "free" software (i.e. software with no restrictions on redistribution), would not include a binary package for Pine or Pico. Many people had a serious dilemma: they loved these programs, but the versions available at the time were not truly free software in the GNU sense of the word. GNU nano is a small and friendly text editor. Besides basic text editing, nano offers features like undo/redo, syntax coloring, interactive search-and-replace, auto-indentation, line numbers, word completion, file locking, backup files, and internationalization support. Starting with version 4.0, nano no longer hard-wraps an overlong line by default. -
28
Atom
GitHub
Atom is a hackable text editor for the 21st century, built on Electron, and based on everything we love about our favorite editors. We designed it to be deeply customizable, but still approachable using the default configuration. A text editor is at the core of a developer’s toolbox, but it doesn't usually work alone. Work with Git and GitHub directly from Atom with the GitHub package. Create new branches, stage and commit, push and pull, resolve merge conflicts, view pull requests and more—all from within your editor. The GitHub package is already bundled with Atom, so you're ready to go! Atom works across operating systems. Use it on OS X, Windows, or Linux. Search for and install new packages or create your own right from Atom. Atom helps you write code faster with a smart and flexible autocomplete. Easily browse and open a single file, a whole project, or multiple projects in one window.Starting Price: Free -
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Firepad
Firepad
Firepad is an open source real-time collaborative text editor. It provides true collaborative editing, complete with intelligent operational transform-based merging and conflict resolution. Firepad can render documents using the CodeMirror, Ace, or Monaco editors, and its operational transform code borrows from ot.js. Behind the scenes, Firepad uses the Firebase Realtime Database for cloud data storage and synchronization. You can build any application that requires collaborative editing of text documents. Firepad supports both rich text and code editing out-of-the-box, and it's easy to extend for other use cases. Firepad was built by Michael Lehenbauer and the team at Firebase. There are many other features that could be added, please star Firepad on GitHub and send over a pull request when you have things to contribute! You can build any application that requires collaborative editing of text documents. -
30
Zed
Zed Industries
Zed is a next-generation code editor designed for high-performance collaboration with humans and AI. Written from scratch in Rust to efficiently leverage multiple CPU cores and your GPU. Integrate upcoming LLMs into your workflow to generate, transform, and analyze code. Chat with teammates, write notes together, and share your screen and project. Multibuffers compose excerpts from across the codebase in one editable surface. Evaluate code inline via Jupyter runtimes and collaboratively edit notebooks. Support for many languages via Tree-sitter, WebAssembly, and the Language Server Protocol. Fast native terminal tightly integrates with Zed's language-aware task runner and AI capabilities. First-class modal editing via Vim bindings, including features like text objects and marks. Zed is built by a global community of thousands of developers. Boost your Zed experience by choosing from hundreds of extensions that broaden language support, offer different themes, and more.Starting Price: Free -
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Nova
Panic
If we're being honest, Mac apps are a bit of a lost art. There are great reasons to make cross-platform apps — to start, they're cross-platform — but it's just not who we are. Founded as a Mac software company in 1997, our joy at Panic comes from building things that feel truly, well, Mac-like. Long ago, we created Coda, an all-in-one Mac web editor that broke new ground. But when we started work on Nova, we looked at where the web was today, and where we needed to be. It was time for a fresh start. It all starts with our first-class text-editor. It's new, hyper-fast, and flexible, with all the features you want: smart autocomplete, multiple cursors, a Minimap, editor overscroll, tag pairs and brackets, and way, way more. For the curious, Nova has built-in support for CoffeeScript, CSS, Diff, ERB, Haml, HTML, INI, JavaScript, JSON, JSX, Less, Lua, Markdown, Perl, PHP, Python, Ruby, Sass, SCSS, Smarty, SQL, TSX, TypeScript, XML, and YAML. -
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Pinegrow
Pinegrow
Pinegrow is a Mac, Windows and Linux web editor that lets you build responsive websites faster with live multi-page editing, CSS & SASS styling, CSS Grid editor and support for Bootstrap, Tailwind CSS, Foundation and WordPress. Pinegrow is a desktop website builder that opens and saves standard HTML and CSS files. That means you won’t be locked into a proprietary file format. Just open and edit your existing projects. Use Pinegrow alongside other web development tools. Build websites offline, without internet connection. Create as many websites as you want. Quickly build the layout of your webpage with powerful visual tools for adding, editing, moving, cloning and deleting HTML elements. Insert multiple elements with repeater and modify the layout of all selected elements with one move. Inspect active CSS rules, use rich visual controls, CSS Grid editor, Dev tools-like editor or code - all working together as one. Edit SASS and LESS, live, without any external tools.Starting Price: $6 per month -
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Caxton
HWY Enigma LLC
Caxton is a native macOS large file text editor and CSV editor in one: a workbench for logs, CSVs, TSVs, JSON, SQL dumps, and exports of any size. One app instead of a text editor, a spreadsheet, and a log viewer: open the file and work. Every delimited file opens as text and as a typed grid; edits in either view show in the other, and saving writes the same file back. Nothing is imported. It memory maps the file instead of loading it into RAM. A 50 GB log (403 million lines) opens immediately with memory under 160 MB. A 10 million row CSV opens as a sortable grid in 4.4 s, past Excel's row limit. Methodology at caxton.app/docs/benchmarks. Find and replace with exact counts, filters that keep line numbers, a log viewer mode with severity filters, file compare, 18 encodings, typed sorting, fill series, remove duplicates. Built for data engineers, SREs, DBAs, and analysts. After the 7-day trial, opening, searching, and filtering stay free; a license adds editing and saving.Starting Price: $9.99/month -
34
phase 5
phase 5
A classic among German HTML editors! Some features of the HTML editor are project management, TAG completion for HTML commands, syntax coloring to improve readability, HTML forms, integrated image viewer, syntax debugger, umlaut conversion, indentation assistant, project-wide replacement of text, user-defined menus and templates, supports common formats such as PHP, Javascript, HTML, VBScript, JAVA, Pearl, file manager to quickly switch between your documents, edit several documents at the same time, table assistant and much more. Free use only for home users and schools. Schools, in the sense of the licensing regulation, are institutions that prepare for vocational training. Companies, registered associations, and authorities must acquire a license in order to be able to work legally with the program. phase 5 runs without problems under both the 32-bit and the 64-bit version of Windows 10.Starting Price: €47.60 one-time payment -
35
JSONBuddy
JSONBuddy
JSONBuddy is a comprehensive JSON editor and validator designed to streamline the creation and management of JSON and JSON Schema files. It offers a range of features, including a text editor with syntax coloring, auto-completion, and code folding, as well as a grid-style editor that simplifies the process of building JSON structures. It ensures error-free JSON through built-in syntax checking and validation against JSON Schema standards, supporting Drafts 4, 6, 7, 2019-09, and 2020-12. Additionally, JSONBuddy provides functionalities for converting between JSON, XML, and CSV formats, importing CSV data to generate JSON, and generating HTML documentation from JSON Schemas. For large JSON files, it offers robust support, allowing users to open, navigate, and edit files with thousands or even millions of lines efficiently.Starting Price: $39 one-time payment -
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BBEdit
Bare Bones Software, Inc.
The leading professional HTML and text editor for the Mac, with high-performance features for editing, searching, and manipulation of text.Starting Price: $49.99 -
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Neovim
Neovim
API is first-class, discoverable, versioned, documented. MessagePack structured communication enables extensions in any language. Remote plugins run as co-processes, safely and asynchronously. GUIs, IDEs, web browsers can, embed Neovim as an editor or script host. Works the same everywhere, one build-type, one command. Modern terminal features such as cursor styling, focus events, bracketed paste. Built-in terminal emulator and strong defaults. Fully compatible with Vim's editing model and Vimscript v1. Start with :help nvim-from-vim if you already use Vim. The current stable release version is 0.5 (RSS). See the roadmap for progress and plans. With 30% less source-code than Vim, the vision of Neovim is to enable new applications without compromising Vim's traditional roles. Lua is built-in, but Vimscript is supported with the most advanced Vimscript engine in the world (featuring an AST-producing parser). -
38
MangoWriter
MangoWriter
MangoWriter is a secure text editor for Windows designed to run completely offline with no cloud, AI, network connections, or telemetry, offering a familiar, simple editing experience while keeping content private by default. It uses state-of-the-art AES-256-GCM encryption with strong key derivation (Argon2id) and optional keyfile two-factor support, ensuring no plaintext is ever written to disk and eliminating caches or temp files. MangoWriter protects your work with a secure clipboard that binds copied content to the current session, an instant lock screen to mask content when stepping away, and one-click bulk redaction tools to permanently black out selected text across documents. Sensitive buffers are zeroed after use and your password never gets stored on disk, with key material kept only in secure memory while a document is unlocked. It is delivered as clean, code-signed builds available as an MSI installer or portable ZIP and includes secure export options. -
39
JetBrains Fleet
JetBrains
Built from scratch, based on 20 years of experience developing IDEs. JetBrains Fleet uses the IntelliJ code-processing engine, with a distributed IDE architecture and a reimagined UI. We built Fleet to be a fast and lightweight text editor for when you need to quickly browse and edit your code. It starts up in an instant so you can begin working immediately, and it can easily transform into an IDE, with the IntelliJ code-processing engine running separately from the editor itself. Fleet inherits the things that developers love the most from IntelliJ-based IDEs – project and context aware code completion, navigation to definitions and usages, on-the-fly code quality checks, and quick-fixes. Fleet’s architecture is designed to support a range of configurations and workflows. You can simply run Fleet just on your machine, or move some of the processes elsewhere – for example by locating the code processing in the cloud. -
40
Emacs
GNU
At its core is an interpreter for Emacs Lisp, a dialect of the Lisp programming language with extensions to support text editing. Content-aware editing modes, including syntax coloring, for many file types. Complete built-in documentation, including a tutorial for new users. Full Unicode support for nearly all human scripts. Highly customizable, using Emacs Lisp code or a graphical interface. A wide range of functionality beyond text editing, including a project planner, mail and news reader, debugger interface, calendar, IRC client, and more. A packaging system for downloading and installing extensions. Built-in support for arbitrary-size integers. Text shaping with HarfBuzz. Native support for JSON parsing. Better support for Cairo drawing. Portable dumping used instead of unexec. Support for XDG conventions for init files. Additional early-init initialization file. Built-in support for tab bar and tab-line. Support for resizing and rotating of images without ImageMagick. -
41
Visual Studio Code
Microsoft
Visual Studio Code (VS Code) is Microsoft’s open-source AI code editor designed to make coding faster, smarter, and more collaborative. It supports thousands of extensions and nearly every programming language, offering developers a lightweight yet powerful environment for writing, testing, and debugging code. With AI-powered features like GitHub Copilot, Next Edit Suggestions, and Agent Mode, VS Code helps you code with precision, automate complex tasks, and streamline development workflows. It integrates seamlessly with cloud services, remote repositories, and tools like Git, Docker, and Azure. The editor is fully customizable, allowing you to personalize your layout, color themes, and keyboard shortcuts. Whether coding locally or in the browser, VS Code delivers a complete development experience for individuals and teams alike.Starting Price: Free -
42
Vimb
fanglingsu
Vimb is a fast and lightweight vim-like web browser based on the WebKit web browser engine and the GTK toolkit. Vimb is modal like the great vim editor and also easily configurable during runtime. Vimb is mostly keyboard-driven and does not distract you from your daily work. If you are familiar with vim or have some experience with pentadactyl the use of Vimb would be a breeze, if not we missed our target. Enable visualization of some runtime settings. Allows controlling the website access to the notification API. it’s modal like Vim. Vim-like keybindings, assignable for each browser mode. Nearly every configuration can be changed at runtime with Vim-like set syntax. History for ex-commands, search queries, URLs. Completions for commands, URLs, bookmarked URLs, variable names of settings, search-queries. Hinting marks links, form fields, and other clickable elements to be clicked, opened or inspected. SSL validation against the ca-certificate file. user-defined URL shortcuts.Starting Price: Free -
43
DroidEdit
DroidEdit
Take your work everywhere. Code while you're waiting for the bus or when you're relaxing in a nice beach. Edit your files directly from the cloud. DroidEdit works with Dropbox, Drive, Box, (S)FTP servers and Git. More file providers coming shortly. Syntax highlighting for almost 200 different programming languages. Don't rush to your office if you receive an emergency call asking you to change some code. Just pick your mobile phone and edit everything you need. Checkout, edit, commit and push directly from your phone or tablet. Some developers prefer dark backgrounds, others can only code on paper white screens. To each his own. Use one of the many provided themes for syntax highlighting. If you don't like any, create your own. Expand simple expressions into full fledged HTML code automagically using Emmet.Starting Price: Free -
44
Kate
KDE
Kate is packed with features that will make it easier for you to view and edit all your text files. Kate lets you to edit and view many files at the same time, both in tabs and split views, and comes with a wide variety of plugins, including an embedded terminal that lets you launch console commands directly from Kate, powerful search and replace plugins, and a preview plugin that can show you what your MD, HTML and even SVG will look like. Kate supports highlighting for over 300 languages making it easier to read code in almost all programming languages. Kate also understands how brackets works and will help you navigate inside complex code blocks hierarchies. On-the-fly spellchecking is also included and will help you check your text before publishing. Work on multiple files at the same time with split views. Use the project sidebar to navigate your project directory structures and use Kate's smart tabs to quickly access your recently opened documents. -
45
EditPlus
Sangil Kim (ES-Computing)
EditPlus is a text editor for Windows with built-in FTP, FTPS and sftp capabilities. While it can serve as a good Notepad replacement, it also offers many powerful features for Web page authors and programmers.Starting Price: $35 -
46
Code::Blocks
Code::Blocks
Code::Blocks is a free, open-source, cross-platform Integrated Development Environment (IDE) primarily designed for C, C++, and Fortran development. Known for its lightweight design and modular structure, Code::Blocks offers a highly customizable interface with support for multiple compilers, including GCC, Clang, and Microsoft Visual C++. It features an intuitive, user-friendly interface with essential tools like syntax highlighting, code folding, auto-completion, and a robust debugging environment with breakpoints, variable inspection, and call stack tracing. Code::Blocks is highly extensible through plugins, enabling developers to add features like version control, scripting support, and custom build tools. Its lightweight nature, flexibility, and cross-platform compatibility make it a popular choice for students, educators, and developers working on small to medium-sized C/C++ projects.Starting Price: Free -
47
WildEdit
TextPad
If you ever need to make the same changes to many files at once, then WildEdit will save you a lot of time. It is an interactive tool for users to edit a set of plain text files in a folder hierarchy, filtered by wildcards. This makes it ideal for editing web pages and software source code or reformatting log files and newsletters. It is not suitable for editing files with proprietary binary formats, such as Microsoft Word documents. You simply need to specify the search text, optionally using a regular expression, the replacement text, and a wildcard filter, then let it run. This process can be repeated as often as is required, and up to the last 10 changes can be undone and redone. WildEdit is available as a trial version before you buy it, so please download your trial copy now, and find out just how productive you can be. You can edit any files containing plain text.Starting Price: $8.50 one-time payment -
48
Lexical
Lexical
Lexical is comprised of editor instances that each attach to a single content editable element. A set of editor states represent the current and pending states of the editor at any given time. Lexical is designed for everyone. It follows best practices established in WCAG and is compatible with screen readers and other assistive technologies. Lexical is minimal. It doesn't directly concern itself with UI components, toolbars or rich-text features and markdown. The logic for these features can be included via a plugin interface. It's super easy to get started with Lexical in any environment. Lexical is framework agnostic, but provides a set of bindings for React to help you get off the ground even quicker. After the initial setup, delightfully ergonomic APIs make building custom functionality straightforward and downright fun!Starting Price: Free -
49
TextMate
MacroMates
Powerful and customizable text editor with support for a huge list of programming languages and developed as open source. Making multiple changes at once, swapping pieces of code, and a lot more is made trivial with TextMate’s easy way to add multiple insertion points. Select what you want to search, what you want to search for, and TextMate will present the results in a way that makes it easy to jump between matches, extract matched text, or preview desired replacements. See what files have changes in the file browser view, what lines have changes in the editor view, bring up a diff of the current file’s changes, commit a subset, TextMate supports it all for all the major version control systems. One file mixing languages? Projects using different build systems? Third party code with different formatting preferences? TextMate can handle it all by associating detailed scope selectors with key shortcuts, settings, etc. -
50
Posting
Posting
Posting is an open source terminal-based API client designed to help developers build, test, and manage HTTP requests directly from the command line through a fast, keyboard-centric interface. It functions as a modern alternative to tools like Postman or Insomnia, but instead of a graphical interface, it runs as a text-based UI (TUI), allowing efficient workflows locally, over SSH, or inside remote environments and containers. It enables users to create and organize API requests into collections stored as simple, readable YAML files, making them easy to version control and share across projects. It includes features such as autocompletion, syntax highlighting, command palette access, and “jump mode” navigation to quickly move through the interface, along with support for importing and exporting cURL commands and integrating with editors like Vim for editing request bodies.
