← Dev Tools
JSON Formatter
Format, minify, and validate JSON.
✓ Valid JSON
Indent
✓ Generated entirely in your browser.
How it works
- Select your file from your device
- Adjust settings if needed
- Save the result — done!
Why LocalConvert?
- 100% private — your files never leave your device. No server uploads, ever.
- Free forever with no file size limits. No accounts, no subscriptions.
- Works offline as an installed app. No internet required after first load.
Frequently asked questions
Does it validate JSON syntax?
Yes. Invalid JSON is flagged with an error message showing the exact line and character where parsing failed.
Can I minify JSON too?
Yes. You can both format (beautify) and minify JSON with a single click.
Related tools