How to Format and Validate JSON Online
Free, step-by-step guide. No signup needed — everything runs in your browser.
1
Open the JSON Formatter
Navigate to the tool. No signup needed.
2
Paste your JSON
Paste minified, unformatted, or messy JSON into the input area.
3
Format instantly
The tool validates your JSON and formats it with proper indentation and syntax highlighting.
4
Copy or download
Copy the formatted JSON to your clipboard or download it as a .json file.
Tips for best results
- The tool validates your JSON as it formats. If there are syntax errors, it will tell you exactly where.
- Use this to debug API responses by pasting the raw JSON and seeing the structured output.
- Minified JSON can be formatted to make it human-readable for debugging and code review.
- The formatter uses 2-space indentation by default, which is the most common convention.
Try JSON Formatter & Validator now
Format and validate JSON data. Free, no signup, 100% private.
Open JSON Formatter & Validator