JavaScript
JavaScript is a scripting language and programming language for the web that enables developers to build dynamic elements on the web. Over 97% of the websites in the world use client-side JavaScript. JavaScript is one of the most important scripting languages on the web. Strings in JavaScript are contained within a pair of either single quotation marks '' or double quotation marks "". Both quotes represent Strings but be sure to choose one and STICK WITH IT. If you start with a single quote, you need to end with a single quote. There are pros and cons to using both IE single quotes tend to make it easier to write HTML within Javascript as you don’t have to escape the line with a double quote. Let’s say you’re trying to use quotation marks inside a string. You’ll need to use opposite quotation marks inside and outside of JavaScript single or double quotes.
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Tablecruncher
Tablecruncher is a lightweight yet powerful CSV editor for Mac, designed to handle large datasets efficiently. It can open files larger than 2GB, containing over 15 million rows, with a 100MB CSV file loading in under 5 seconds on a dual-core MacBook Pro. It supports various encodings, including UTF-8, UTF-16LE, UTF-16BE, Latin-1 (ISO-8859-1), and Windows 1252, automatically detecting most CSV formats and encodings. Users can utilize JavaScript as a macro language to manipulate CSV files, accessing all cells for content changes and calculations. Tablecruncher allows exporting table data to JSON, producing an array of objects if a header row is present, or an array of arrays otherwise. The find and replace dialog supports pattern searches within the table or selected areas, with Regular Expressions compliant with the ECMAScript 5 standard. It offers four color themes, including a dark mode compatible theme, enhancing user experience.
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JSON Viewer
jsonviewer.tools
— a powerful and interactive JSON visualization platform that helps users easily view, analyze, and explore complex JSON data.
Graph & Tree Visualization – Interactive 2D and compact graph modes with zoom, pan, and hover link visualization.
Table View for CSV – Upload CSV files and view them in a clean, sortable table format.
3D Visualization – External 3D JSON graph visualization option.
File Support – Upload and visualize JSON, CSV, and YAML files.
Interactive Graph Export – Double-click any JSON key to generate a graph for that key and export it as PNG.
Direction Control – Change the graph direction (horizontal/vertical).
Theme Customization – Switch between light/dark or custom color themes.
Comparison Tool – Compare two JSON files side by side.
Dummy JSON Generator – Quickly generate sample JSON for testing or demo use.
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SmoothCSV
SmoothCSV is a desktop CSV editor for Windows, macOS, and Linux. It opens files in a spreadsheet-style grid for editing rows, columns, and multiple cells, with search and replace, filtering, sorting, and tools for comparing files. Users can detect or configure delimiters, quoting, text encoding, and line endings to control how CSV data is read and saved. A built-in SQL console runs SELECT queries on CSV files; selection statistics, aggregation, and text transforms support data review and cleanup. SmoothCSV also imports and exports Excel workbooks, exports PDF, and offers command-line workflows. It is designed for developers, analysts, and other people who regularly inspect or edit tabular files. All features are available without a purchase, while optional one-time individual and team licenses support development and suppress reminder notifications.
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