JSON Formatter & Validator
JSON formatter: Format, minify, and validate JSON directly in your browser, with readable output and syntax error details.
Paste JSON on the left · formatted output appears on the right
How to Use the JSON Formatter
Paste Your JSON
Copy your raw or minified JSON into the left input panel. The JSON formatter accepts any valid or invalid JSON string — no file upload required.
Format, Minify or Validate
Click Format to beautify with indentation, Minify to strip whitespace, or Validate to check for syntax errors. The JSON formatter reports line and column numbers on every error.
Copy the Output
Use Copy Output to grab the formatted result for your editor or API client. The JSON formatter keeps your output ready to paste in seconds.
Why This JSON Formatter Helps
Instant Formatting & Minifying
This JSON formatter beautifies messy JSON with 2 or 4-space indentation, or compresses it to a single line for API payloads — one click, instant result.
Precise Error Detection
When JSON is invalid, the JSON formatter gives you a clear error message with the exact line and column number so you can fix issues fast.
Runs locally in your browser
Every JSON formatter operation runs in your browser using native JavaScript. Your data never touches any external server.
Adjustable Indentation
Choose between 2-space and 4-space indentation so this JSON formatter matches your project's code style guide.
Common questions
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