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Format JSON Online
Pretty-print, minify, and indent JSON safely. Use JSON Formatter in your browser with no signup, no daily limit, and no backend processing for tool input.
Problem
You need messy or minified data to become readable enough for debugging, documentation, or sharing.
What to do
Formatting does not change the meaning of the data. It makes structure visible so errors, nested fields, and unusual values are easier to spot.
- 1Paste the raw content into JSON Formatter.
- 2Choose pretty-print, minify, indentation, or formatting options.
- 3Copy the formatted result for review or reuse.
Use the browser tool
JSON Formatter is a free, in-browser tool to pretty-print, minify, and re-indent JSON safely. Paste valid or slightly-broken JSON and get clean, readable output instantly — with syntax-aware highlighting and one-click copy. Ideal for inspecting API responses and config files.
People also ask
- How do I use JSON Formatter?
- Paste or drop your data into the workspace, adjust the options to fit your data, then copy or download the result. Pretty-print, minify, and indent JSON safely.
- Is my data uploaded or stored anywhere?
- No. Everything runs locally in your browser — your data is never uploaded to a server. Nothing is sent to a server, so it's safe to use with private or sensitive data.
- Is JSON Formatter free?
- Yes — it's completely free with no account, no sign-up, no watermark, and no daily usage limits.