What is JSON formatting?

JSON formatting (also called pretty-printing or beautifying) adds consistent indentation and line breaks to JSON text, making it human-readable. Minification removes whitespace to reduce file size.

Does the formatter validate JSON?

Yes. If your input is invalid JSON, the tool shows the exact parse error message so you can fix it.

What is the maximum JSON size it can handle?

Since processing runs in your browser, there is no server-side size limit. Most modern devices handle several MB of JSON without issues.

Is my JSON sent to a server?

No. All processing uses the browser's built-in JSON.parse() and JSON.stringify() — your data never leaves your device.

Can I format JSON with comments (JSON5)?

Standard JSON does not support comments. Remove any // or /* */ comments before formatting. The tool strictly follows the RFC 8259 JSON specification.

What do the stats (keys, depth) mean?

Keys shows the total count of all keys in the object tree. Max Depth shows how many levels of nesting the deepest value is at.

JSON Formatter & Validator — Beautify and Minify JSON Online | Toolivon

JSON Formatter & Validator

Format, validate, and minify JSON instantly. Syntax errors highlighted with exact messages.

Indent:

Input JSON

Output

Output will appear here…

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How to Format JSON

1
Paste your JSON
Paste raw or minified JSON into the left input panel.
2
Choose indent size
Select 2 or 4 spaces for indentation.
3
Click Format
Hit Format to pretty-print the JSON with correct indentation and line breaks. Any syntax errors are shown immediately.
4
Or click Minify
Click Minify to strip all whitespace and produce the smallest possible JSON string.
5
Copy the output
Click 'Copy' next to the output panel to copy the result to your clipboard.

Frequently Asked Questions

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