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JSON Formatter & Validator

Paste your JSON to validate syntax with precise error reporting, format with clean indentation, or minify to a single line.

Indentação:
✓ Valid JSON
Size: 316 BLines: 22Keys: 11Depth: 4
Formatted JSON:22 linhas

How it works

1

Paste or type your JSON in the input box.

2

Verify instant syntax validity and pinpoint any errors by line and column.

3

Select 2 or 4 spaces, tab indentation, or minify.

4

Copy the formatted JSON with one click.

Frequently asked questions

Is it really free?

Yes. The site is supported by ads, so you never pay or need to create an account.

Does it send my JSON to a server?

This tool runs entirely in your browser: nothing is uploaded to a server.

How do I fix syntax errors?

The validator highlights the exact line and column where the syntax broke, helping you fix missing brackets or trailing commas.

Does it work on mobile?

Yes. The page adapts to your screen and does not require installing any app.