JSON Formatter & Validator
Format and validate JSON in the browser. Useful for schema drafts, API samples, and config files.
What this tool does
JSON-LD schema, API responses, and config files are easier to debug when properly indented. This formatter validates syntax and beautifies in one step — all local, no upload.
How to use it
- 1
Paste minified or messy JSON into the input box.
- 2
View formatted output with proper indentation.
- 3
Copy the beautified JSON or fix syntax errors shown.
Validation workflow
Invalid JSON breaks schema markup silently in some CMS plugins. Always validate before pasting into production.
Minify JSON for production APIs to reduce payload size — format only for human editing.
Tips
- Watch for trailing commas — invalid in JSON but common in JavaScript.
- Use with schema markup generator for a complete SEO workflow.
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Frequently asked questions
Does this send JSON to a server?▼
No. All formatting happens locally in your browser.
Can I validate schema markup?▼
Yes. Paste your JSON-LD to check syntax before adding to your site.