Validate pasted JSON
Catch syntax issues in API responses, schema snippets, app settings and structured data before sharing or publishing.
Free Tool
JSON Formatter for Smarter Website Decisions
Clean and validate API responses, config snippets and structured data by formatting or minifying JSON directly in your browser.
Developer Utility
JSON Formatter
Ready
StatusEmpty
JSON TypeEmpty
Keys / Items0
Characters0
What It Checks
Focus Areas for This Tool
These are the signals I would review manually when deciding what needs fixing first.
01
JSON validation
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02
Pretty formatting
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03
Minified output
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04
Copy and download output
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Optimization Guide
How This Tool Helps Before Publishing
A little context makes the numbers more useful. Use these notes to understand where this tool fits inside content, SEO and website reviews.
Make dense JSON readable
Beautify minified JSON with consistent spacing so nested objects, arrays and values are easier to inspect.
Prepare compact output
Minify formatted JSON when you need a smaller snippet for configs, test fixtures or quick handoff.
Private browser-based parsing
The formatter runs locally in your browser, so pasted JSON does not need to be uploaded to a server.
FAQs
Frequently Asked Questions
Quick answers about how this tool works and when to use it.
It parses pasted JSON, reports syntax errors, formats valid JSON with readable indentation and can also minify it.
Yes. If the input cannot be parsed as JSON, the tool shows the browser parser error so you can fix the syntax.
Yes. You can format JSON using 2, 4 or 8 spaces depending on your preferred style.
No. The tool runs in your browser, so pasted JSON is processed locally on your device.