Free — format, validate & minifyJSON Formatter
Beautify, validate, and minify JSON instantly. Syntax error detection with line numbers. All client-side.
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Beautify & Minify
Pretty-print with custom indentation or compress to a single line.
Validation
Instant error detection with line numbers and descriptive messages.
Private
Everything runs locally. Your data never leaves your browser.
Frequently asked questions
What does 'beautify' do?
Beautify reformats your JSON with proper indentation and line breaks, making it easy to read and edit.
What does 'minify' do?
Minify strips all unnecessary whitespace and newlines, producing the smallest possible JSON string. Useful for APIs and config files.
Can it handle large JSON files?
Yes, the formatter works with JSON of any size that your browser can handle. Performance may vary with very large files (10MB+).
Is my JSON data safe?
Absolutely. All processing happens locally in your browser. Your data is never sent to any server.