JSON Formatter & Minifier
Format JSON for readability or minify it for production. Free in-browser tool that validates syntax live, pinpoints parse errors, and stays local.
Enter your JSON here...
How to Use
- Paste the JSON you want to format (API response, config file, log output, or any serialized object)
- Pick the indent width: 2 spaces is the most common in frontend; 4 spaces is typical in Java- or Spring-influenced teams
- Click "Format" to read it cleanly — everything runs locally and if the JSON has errors, the exact line is highlighted
- Click "Minify JSON" to strip whitespace and line breaks for a production- or HTTP-transport-ready version
- Copy the result with one click and paste into VS Code, IntelliJ, Slack, Notion, or a Jira ticket
- Common API debugging flow: open Chrome DevTools Network tab → Copy Response → paste here → inspect the full structure in seconds
All processing is done in your browser, and files are never sent to a server.
Frequently Asked Questions
Formatting adds indentation and line breaks for readability, while minifying removes all unnecessary whitespace to reduce file size.
Yes, you can choose between 2 spaces and 4 spaces indentation.
No, formatting only changes the visual presentation. The JSON data remains exactly the same.
No. Formatting and validation happen locally in your browser — safe for production data, secrets, and API responses.
Yes. The parser reports the line and column of the first invalid token, with surrounding context for quick fixing.
Yes — pick the indentation style that matches your team's lint config. The chosen style applies to all nested levels.
Yes — formatting before commit keeps diffs focused on real changes instead of whitespace shifts.