Is JSON Formatter & Validator free?

Yes. JSON Formatter & Validator runs entirely in your browser. No data is uploaded or stored.

Does JSON Formatter & Validator work offline?

Yes. Once loaded, JSON Formatter & Validator works fully offline except for the QR code generator which uses a pinned CDN with SRI.

Local-only · nothing leaves your browser

How do I format JSON?

Paste or type JSON below to instantly validate and format it. The tool detects syntax errors, auto-indents, and minifies. Everything runs in your browser — no data is uploaded.

Input JSON

Output

Output will appear here...

⚠ JavaScript is required for this tool — the page content above works without it.

F.A.Q. — Questions, answered

What is JSON Formatter & Validator?Paste or type JSON below to instantly validate and format it. The tool detects syntax errors, auto-indents, and minifies. Everything runs in your browser — no data is uploaded.
Is JSON Formatter & Validator free?Yes. JSON Formatter & Validator runs entirely in your browser. No data is uploaded or stored.
Does JSON Formatter & Validator work offline?Yes. Once loaded, JSON Formatter & Validator works fully offline except for the QR code generator which uses a pinned CDN with SRI.

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