📝 Text Tool

Free JSON Formatter

Paste JSON to validate, beautify, minify or explore it as a tree — instantly, right in your browser.

Paste your JSON below
Waiting for input… ✓ Valid JSON 0 B 0 lines
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Live Validation
Errors are caught as you type, with the exact message and position from the JSON parser.
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Tree Explorer
Flip to tree view to browse deeply nested objects and arrays with color-coded values.
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100% Private
Your JSON is parsed locally — API responses and configs never touch a server.

What is a JSON Formatter?

A JSON formatter takes raw JSON — often a single unreadable line from an API or log file — and pretty-prints it with consistent indentation so humans can read it. ToolLove's formatter also validates your JSON, pinpointing exactly what's wrong and where, and can minify it back down for compact transport.

❓ Frequently Asked Questions

No. Parsing and formatting happen entirely in your browser using the native JSON.parse / JSON.stringify — your data never leaves your device.

The most common causes: trailing commas ([1, 2, 3,]), single quotes instead of double quotes, unquoted keys, comments (// not allowed), and unescaped newlines inside strings.

Comfortably several megabytes. For very large payloads the tree view may take a moment — the textarea and validation stay fast.

Yes — the .json button downloads exactly what's in the editor as a .json file. Copy puts it on your clipboard.