JSON Formatter
Beautify, validate and minify JSON instantly. Paste your data, pick an action — all processed privately in your browser.
Format, validate and minify — in one place
Messy JSON is hard to read and easy to break. Beautify turns a single dense line into clean, indented, readable structure; Minify strips it back down for production; and if anything is malformed, the built-in validator points you straight to the error. Because everything runs on your device, even JSON containing keys or private data stays completely secure.
Frequently asked questions
Is my JSON sent to a server?
No. All formatting and validation happens in your browser — your data never leaves your device, which matters for API keys and private data.
What does 'Beautify' do?
It re-formats your JSON with clean indentation and line breaks so it's easy to read. You can choose 2 spaces, 4 spaces or tabs.
What does 'Minify' do?
It removes all unnecessary whitespace to produce the smallest possible JSON — useful for storage or sending over a network.
How does validation work?
If your JSON has a syntax error, the tool shows the exact message from the parser so you can find and fix the problem quickly.