JSON Formatter & Validator

Pretty (format) adds line breaks and indentation (2 spaces, 4 spaces, or a tab) to lay the JSON out so it is easy for humans to read. Minify does the opposite: it removes all line breaks and extra whitespace and collapses the JSON onto a single line to make the data as small as possible. Use Minify when you want to reduce transfer size, and Pretty when you want to review or edit the content.

This tool validates your input with JSON.parse every time you type. If the syntax is valid it shows "✓ Valid JSON", and if there is a mistake it shows the message in the red error box. When possible it also notes the approximate location of the error (around line N), which makes it easier to spot missing commas or unclosed brackets.

No. Formatting, minifying, and validation all happen entirely in JavaScript inside your browser. The JSON you enter is never sent to or stored on a server, so you can safely use it even with data that contains sensitive information.