JSON Formatter & Validator

Paste JSON to beautify, minify or validate it. Errors show a line number. Nothing is sent to a server.

JSON

Tree

How to validate JSON

This page uses JSON.parse. Trailing commas, comments and single quotes are invalid in standard JSON. The error message includes the character position so you can jump to the problem.

Frequently asked questions

Is my JSON uploaded?

No. Parsing is done with JSON.parse in your browser.

Why is my JSON invalid?

Common issues: trailing commas, single quotes, comments or unquoted keys. The error message points to the first problem.

Can I minify for production?

Yes. Minify removes whitespace so payloads are smaller.

Does it sort keys?

Beautify keeps the original key order.

Large files?

Very large JSON (many megabytes) may freeze a tab. Split it if needed.

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