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JSON Formatter format · validate · minify

Paste JSON and get it indented, validated or minified — with the exact line and column when it is broken. Everything runs in this tab.

Input 0 B

Output —

Questions we get a lot

Will it sort keys?

Yes, as an option — sorting is off by default because key order can be meaningful in some APIs.

Does it preserve number precision?

It uses the browser number type, so integers beyond 2^53 lose precision. Large IDs should be kept as strings.

What happens on invalid input?

The parse error is translated into a line and column, and the cursor is placed on the offending character. Nothing is auto-corrected — guessing what you meant is how data gets corrupted.