JSON Tools

Yes, completely free with no account, login, or signup required. All features are available immediately.

All processing happens entirely in your browser. Your JSON is never sent to any server.

Format (pretty print), Validate, Minify, Tree viewer, Escape/Unescape, Sort keys, Flatten, and Compare two JSON objects.

Yes. The formatter handles large JSON files efficiently in the browser without sending data to a server.

Yes. Click the Share button to copy a link that restores your JSON and active tab when opened.

JSON (JavaScript Object Notation) is a lightweight text format for storing and exchanging data. It is human-readable and widely used for APIs, configuration files, and data storage.

Paste your JSON into the Format tab and choose 2 spaces, 4 spaces, or Tab indent. Click Format to pretty-print it instantly.

Switch to the Validate tab, paste your JSON, and the tool highlights exactly which line contains a syntax error.

JSON is a text string — keys must be double-quoted and trailing commas are not allowed. A JavaScript object is runtime data that allows unquoted keys and functions.

Use the Minify tab. It strips all whitespace and newlines, reducing payload size for HTTP responses and storage.

Yes. The Sort tab recursively sorts all object keys alphabetically, which helps with diffing and version control.

It means the parser found a character it did not expect — common causes are a trailing comma, an unquoted key, or a single-quoted string.

Use the Compare tab. Paste two JSON values and the tool highlights keys that differ, are missing, or have different types.

Use the Flatten tab. It converts deeply nested objects into a single-level object using dot notation keys, e.g. user.address.city.