Is my JSON data uploaded to a server?

No. All formatting, minifying, and validation happens locally in your browser using JavaScript. Your JSON never leaves your device — it is never uploaded, logged, or stored anywhere.

What's the difference between Format and Minify?

Format (also called beautify or pretty-print) adds indentation and line breaks to make JSON human-readable. Minify strips all unnecessary whitespace to produce the smallest possible output, which is ideal for transmitting data or reducing file size.

How does validation report errors?

When your JSON is invalid, the tool shows the parser's error message along with the exact line and column where the problem occurs, so you can jump straight to the issue and fix it.

What does the 'sort keys' option do?

Sort keys recursively reorders every object's properties alphabetically. This is useful for producing deterministic output, making diffs cleaner, or comparing two JSON documents that contain the same data in a different order.

Is there a size limit for JSON?

There is no fixed limit. Because everything runs in your browser, you can format very large JSON documents, though extremely large files may be constrained by your device's available memory.

JSON Formatter & Validator

Beautify, minify, and validate JSON instantly — privately in your browser. Nothing is ever sent to a server.

Indent

Sort keys

Input JSON

Result

How it Works

Clean up and validate your JSON in three simple steps.

Paste your JSON

Type or paste any JSON into the input box — valid or messy, it's fine.

Choose an action

Format to beautify, Minify to compress, or Validate to check for errors.

Copy or download

Copy the result to your clipboard or download it as a .json file.

JSON Tips

Work with JSON more effectively with these tips.

Format before reviewing

Beautified JSON with consistent indentation is far easier to read, review, and debug than a single compressed line.

Minify for production

Strip whitespace before sending JSON over the network or storing it to reduce payload size and improve performance.

Sort keys for clean diffs

Alphabetically sorting keys makes two JSON documents easier to compare and produces smaller, clearer version-control diffs.

Watch for trailing commas

Unlike JavaScript objects, JSON does not allow trailing commas. The validator points you to the exact line and column when one slips in.