JSON Formatter – Format & Validate JSON Online
Featured100% FreeFormat, validate, and minify JSON data. See syntax errors highlighted, view tree structure, and toggle between formatted and minified views.
What is JSON Formatter / Validator?
The JSON Formatter and Validator is an indispensable tool for software developers, API engineers, and data analysts. It transforms messy, minified, or unformatted JSON (JavaScript Object Notation) strings into clean, indented, and human-readable code.
The tool also features an instant JSON syntax validator that detects missing commas, unmatched brackets, incorrect quotes, and formatting errors with precise line indicators.
You can beautify with 2-space or 4-space indentation, minify JSON for production payloads, or copy the formatted output with a single click.
How to Use JSON Formatter / Validator
Follow these simple steps to achieve perfect results in seconds.
1. Paste Your JSON
Paste raw JSON text into the input workspace.
2. Format or Minify
Click 'Format JSON' to beautify with clean indentation, or 'Minify' to remove whitespace.
3. Validate & Copy
Verify that your syntax is 100% valid and click 'Copy to Clipboard' for use in your code.
Key Features
- Instant JSON syntax validation with descriptive error notifications
- Flexible indentation options (2-space and 4-space indentation)
- High-speed minification for compact API transmission
- Runs 100% client-side: your sensitive payloads never touch a remote server
Benefits & Advantages
- Debug REST APIs and webhook responses in seconds
- Inspect nested configuration files and database document dumps
- Protect confidential API data with client-side execution
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