Pretty-print
Consistent 2-space indentation, keys quoted, arrays and objects broken onto their own lines. The format is identical to what you get from JSON.stringify(x, null, 2) — no opinions, no custom style.
Developer Tools
Free
JSON Formatter & Validator
Format, validate, and minify JSON data instantly. Perfect for API development and debugging.
// Formatted JSON will appear here
✨
Format & Beautify
Add proper indentation and line breaks to make JSON readable
✅
Validate Syntax
Instantly detect and highlight JSON syntax errors
📦
Minify JSON
Remove whitespace to reduce file size for production
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Get Free API KeyWhat is the JSON formatter?
A free JSON pretty-printer, minifier, and validator that runs entirely in your browser. Paste in messy JSON, get back clean JSON with consistent indentation — or the exact line and character where the parser choked. Built for the moment when you copy a payload out of devtools or a Slack message and just want to read it without rage.
Minify
Strip every byte of whitespace down to a single-line representation. Useful when embedding JSON in a shell env var, a YAML one-liner, a curl body flag, or anywhere the surrounding tooling chokes on newlines.
Validate
Strict JSON validation. Bad input is rejected with the line and character number of the offending token, so you can fix the producer rather than guessing whether the issue is a trailing comma or a missing quote.
Pairs naturally with SocialAPIs responses
Every endpoint at /api-sources returns JSON. Copy a response into the formatter to inspect the shape before writing extraction code, or use the JSON path selector tool next door to generate the actual access code in Python, JavaScript, Java, or Go.
Frequently asked questions
Is the JSON sent to a server?
No. Formatting, minification, and validation all run in your browser. The JSON you paste never leaves the tab — safe to use on private API responses, customer payloads, or anything else you can't share publicly.
What does the formatter actually do?
Three things: pretty-prints valid JSON with consistent 2-space indentation, minifies JSON down to a single line (useful for embedding in env vars or curl bodies), and validates malformed JSON by pointing at the exact line and character where the parser bailed. The errors are JSON-spec-correct — same diagnostics your runtime would give you, just faster.
How is this different from a code editor or IDE plugin?
Same outcome, no install. An IDE plugin is the right call if you format JSON daily and want it inline with your code editor. This tool is the right call when you're triaging a one-off response (Slack DM from a teammate, copy from a postman session, a webhook body in an incident channel) and want the answer without context-switching.
Does it handle JSON5 / JSONC / trailing commas?
No — strict JSON only. If you paste JSON5 (single quotes, trailing commas, comments) the validator will reject it with the line number of the offending character. That's intentional: the format is the lingua franca for API responses, and accepting non-strict variants would mask real bugs in the producer.
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