JSON Formatter
Format, validate and minify JSON in your browser.
Format, validate and pretty-print JSON online for free. Paste messy or minified JSON and instantly get beautified output with clean indentation and validation. No uploads, no signup and no limits — ideal for developers debugging APIs and configuration files.
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Output
Frequently asked questions
Does the formatter work with invalid JSON?
It validates first. If the input has errors, it points out exactly where the problem is so you can fix it quickly.
Will it handle large JSON files?
It is built for typical API responses and config files, and it processes everything locally in your browser with no upload.
Why use this JSON formatter?
Because it is free, private — files never leave your browser — and instantly shows clean formatted output with clear error messages.