JSON Formatter & Minifier
Format, validate, and minify JSON instantly in your browser. No upload, no account.
Format or minify JSON to see the output here.
How to use this tool
What this tool does and how it can help.
JSON formatting converts compact or minified JSON into a readable layout with indentation. Minifying does the opposite by removing unnecessary whitespace so the JSON is shorter.
This is useful when debugging API responses, cleaning pasted payloads, or preparing data for production and reviews. The tool runs fully in your browser, so your data never leaves your device.
- Paste your JSON and click Format JSON to pretty-print it.
- Click Minify JSON to remove spaces and line breaks.
- Copy the cleaned output for use in files, terminals, or API clients.
- Errors are shown immediately when the input JSON is not valid.
FAQ
- Does this tool validate JSON?
- Yes. If the JSON is invalid, an error message will be displayed.
- Is my data sent to a server?
- No. Everything runs locally in your browser.
- Can I minify JSON with this tool?
- Yes. Use the "Minify JSON" button to remove spaces and line breaks.