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JSON Formatter & Validator โ€“ Format JSON Online Free

Beautify, minify, and validate JSON data instantly in your browser. Syntax highlighting, error detection with line numbers, adjustable indentation. No sign-up required.

๐Ÿ†“ Free{ } Beautifyโšก Minifyโœ… Validate๐ŸŽจ Syntax Highlight

{ } JSON Formatter & Validator

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๐Ÿ“ฅ Input JSON
๐Ÿ“ค Formatted Output
๐Ÿ“ข Responsive Mid Ad ยท 728ร—90 / 320ร—50

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๐Ÿ’ก Tips

โœจPaste raw JSON and click Beautify for instant readable formatting.
โšกUse Minify to reduce JSON size before sending over API.
๐Ÿ”ดErrors show the line and column โ€” fix the highlighted position first.
๐Ÿ”’JSON never leaves your browser โ€” 100% private processing.

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โ“ Frequently Asked Questions โ€“ JSON Formatter

What is JSON Beautify vs Minify?
Beautify adds indentation and line breaks to make JSON human-readable. Minify removes all whitespace to reduce file size for APIs and storage. Both produce valid JSON โ€” just formatted differently.
Why is my JSON showing an error?
Common JSON errors include: missing quotes around keys, trailing commas after the last item, single quotes instead of double quotes, and unescaped special characters in strings. The error message shows the exact line and column to help you fix it quickly.
Is my JSON data safe?
Yes โ€” all processing happens entirely in your browser using JavaScript. Your JSON data is never sent to any server, making this tool 100% private and safe for sensitive data.
What indentation should I use?
2 spaces is the most common for web APIs and JavaScript projects. 4 spaces is preferred in Python projects. Tabs are used in some Go and C projects. All produce valid JSON โ€” it's purely a readability preference.