JSON Formatter and Validator
Format, validate, and pretty-print JSON data with syntax highlighting. Reports error positions for malformed JSON.
How to Use JSON Formatter and Validator
The JSON Formatter and Validator is a free online tool that formats, validates, and pretty-prints JSON data with syntax highlighting. Paste minified or messy JSON and get beautifully indented, color-coded output instantly. If your JSON contains errors, the tool reports the exact position of the problem so you can fix it quickly. Whether you are debugging API responses, formatting configuration files, validating webhook payloads, or cleaning up JSON data for documentation, this tool handles files up to 1 MB. Essential for web developers, backend engineers, QA testers, and anyone working with JSON APIs and data interchange formats.
Step-by-Step Instructions
- Paste your JSON data into the input area
- The tool automatically validates and formats the JSON
- View the pretty-printed output with syntax highlighting
- If errors exist, check the error message for the exact position to fix
- Copy the formatted JSON using the copy button
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