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Paste JSON below and click "Check & Suggest Fix" in the toolbar to validate it. If it’s valid, you’ll see whether it parsed as an object or an array (and how many items). If it’s invalid, you get the exact line and column of the problem.
This catches the errors that are hardest to spot by eye: a missing comma, an extra trailing comma, or an unclosed brace buried in a large payload.
🛡️Secure & Private: Your data is processed, then deleted right away. Nothing is logged or saved.
Preview
⏳DOCX / XLSX: after clicking "Convert", please wait about 15 seconds for the file to finish being fully generated before clicking "Download" — the Download button will stay disabled and count down until it's ready.
📄 DOCX / PDF / RTF are document containers — pick which text format gets written inside them with the extra "Content" dropdown (e.g. keep it as JSON, or write XML/CSV/YAML text instead).
Input
Ready
Lines: 0Words: 0Chars: 0Size: 0 KB
Input statistics are available via the Stats button above this field.
Output
Lines: 0Words: 0Chars: 0Size: 0 KB
Output statistics are available via the Stats button above this field.
Results are provided for informational purposes only and may contain errors. Please verify important information independently. Use of this tool is at your own risk.
Is this tool free?
Free online. No signup, no email required. Get results on this page.
How do I get my result?
Use the tool on this page. Your result appears here; no email delivery is required.
Frequently Asked Questions
Does it tell me exactly where the error is?
Yes - errors are reported with line and column numbers whenever the underlying parser provides a position, so you don’t have to scan the whole document manually.
Does it check my data against a schema?
No - this validates JSON syntax (that it parses correctly), not structural rules like required fields or types. For that you’d need a JSON Schema validator.