JSON formatter

Format, validate and minify JSON. Shows clear error messages. Processing stays in your browser.

Runs in your browser · nothing is sentConvert & format

JSON

The result appears here

About this tool

Paste your JSON and choose Format or Minify. If something is wrong, you see what.

🔒 Your input stays in your browser and is never sent anywhere.

Why is my JSON invalid?

Often because of a trailing comma, single quotes or a key without quotes.

XML formatterFormat, validate and minify XML. Shows the element count and any syntax problems, with line and column numbers.
String escape & unescapeEscape or unescape text for JSON strings, regular expressions and shell commands. Avoids quoting mistakes.
Text compare (diff)Compare two texts line by line and see added and removed lines. Handy for configs and scripts.

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