Paste your JSON and instantly pretty print, minify, validate, or sort it. View as tree. One-click copy. 100% private — your JSON never leaves your browser.
Paste Your Data — Drop the raw JSON response from your API or configuration file into the editor. It handles payloads up to several megabytes instantly.
Choose Your Tab Size — Select between 2-space or 4-space indentation. We recommend 2 spaces for web development and 4 spaces for better readability in logs.
Format and Inspect — Watch as the tool reconstructs the code. Use the visual hierarchy and color coding to identify nested properties and structural errors.
Fix and Copy — If the tool highlights a syntax error, fix it directly in the editor and click "Beautify" again. Copy the result with one click for use in your project.
"name": "Value".{} for objects and square brackets [] for arrays.Many modern languages like JavaScript and Python allow trailing commas in lists. JSON does NOT. If your code is failing only when you add a new item, check the end of the previous object for a stray comma!
Manual alignment is slow and error-prone. Our tool converts single-line strings into a multi-line hierarchy, making nesting levels obvious. If your JSON is invalid, the validator won't just fail; it will tell you exactly which line is causing the problem.
Privacy First: All formatting happens locally. Your sensitive API keys and user data are never transmitted to our servers or stored in any database.
Common reasons for invalid JSON include: using single quotes (') instead of double quotes (") for keys and strings, leaving a trailing comma after the last item in an array or object, or forgetting to enclose keys in double quotes.
Because the formatting is handled by your browser's local memory (RAM), there is no hard server limit. However, attempting to format multi-gigabyte JSON files may cause your browser tab to freeze. It comfortably handles payloads up to several megabytes instantly.
Currently, this specific tool focuses on validating, formatting, and minifying JSON. We are working on adding dedicated converter tools for JSON-to-CSV and JSON-to-XML in the near future.
Yes. We use standard HTML5 local processing (JavaScript `JSON.parse` and `JSON.stringify`). We do not send your clipboard data or entered text to any backend server. However, as a general security best practice, you should always obfuscate live API keys when pasting into any browser-based tool.
This tool uses the native V8 JSON engine for parsing to ensure high-fidelity validation. 100% Zero-Knowledge architecture — no data is sent to external servers. Last Audit: May 2026.