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-browser · no uploads

How it works

1.Parses the raw JSON string using the browser V8 JavaScript runtime.
2.Formats and indents tree structures with 2-space or 4-space tabulation.
3.Computes exact character position, line number, and column index when a parsing error is encountered.

Frequently asked 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.

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