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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SafeJSON
SafeJSON is an all-in-one local JSON toolkit built exclusively for developers. All parsing, comparison, JWT decoding and validation runs 100% inside your browser, with zero user data uploaded to external servers.
Core features include standard JSON formatter, visual JSON Diff, JWT token decoder, JSONPath query engine, and JSON Schema validator. It supports huge 50MB+ JSON files powered by Web Workers, dark mode, collapsible tree views, and one-click raw JSON export.
Users can independently verify full privacy via Chrome DevTools Network panel — no API keys, tokens or confidential payloads leave your device. The core toolset is permanently free, with advanced features (Diff & JWT) available via SafeJSON Pro ($5/month or $39/year). The full codebase is fully open-source on GitHub for full audit.
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JSON Editor Online
JSON Editor Online is a versatile tool designed for viewing, editing, formatting, repairing, comparing, querying, transforming, validating, and sharing JSON data. It offers multiple editing modes, text, tree, and table, to accommodate various user preferences. It supports large JSON files up to 512 MB and provides functionalities such as JSON Schema validation, JSON-to-CSV conversion, and offline usage. Users can load and save JSON data through various methods, including clipboard operations, drag-and-drop, disk storage, and URLs. The tool also features a "Smart JSON Formatting" option for more compact and readable JSON presentations. While the free version includes ads, subscription options are available for an ad-free experience and additional features like private cloud document storage.
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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.
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