Runs in your browser
Developer
Popular
JSON Formatter & Validator
Format, prettify, minify, and validate JSON data instantly. Identifies exact line and column locations for syntax errors with keyboard shortcuts and zero telemetry.
JSON Editor
Press ⌘ + Enter to format
Valid JSON Structure100% Client-Side • No data transmitted
Runs in your browser. No uploads.
How it works
- 1Parses the raw JSON string using the browser V8 JavaScript runtime.
- 2Formats and indents tree structures with 2-space or 4-space tabulation.
- 3Computes exact character position, line number, and column index when a parsing error is encountered.
Questions
Press Cmd + Enter on macOS or Ctrl + Enter on Windows/Linux to instantly format your JSON.
Yes. Your JSON payloads, API responses, and database dumps are parsed locally in memory and never sent across the internet.