JSON Formatter & Validator
Developer ToolsFormat, minify, and validate JSON with error highlighting.
About JSON Formatter & Validator
Prettify, minify, and validate JSON instantly. Paste raw JSON to format it with proper indentation, or validate it to find syntax errors with line numbers.
How to use JSON Formatter & Validator
- 1Paste or enter the source material the tool asks for.
- 2Choose the available options that match your workflow.
- 3Run the tool and review the output before using it on a live page or campaign.
- 4Copy, download, or share the result and continue with the related tools below.
Example workflow
Start with a real developer tools task, run JSON Formatter & Validator, then save the reviewed output as a reusable example for the next job. This keeps the tool fast while preserving human review.
Limitations and privacy
Results are a first pass and should be checked before publishing. Most tools run in your browser; URL-fetching tools use a secured server request with timeouts, rate limits, and private-network blocking.
Frequently Asked Questions
JSON formatting (prettifying) adds proper indentation and line breaks to make compact or minified JSON human-readable.
Yes - paste your JSON and the validator instantly tells you if there are syntax errors, with the line number where the error occurs.