Format and validate JSON
Paste messy JSON, get it readable. If it's broken, you get where it's broken — not just “unexpected token”.
Runs entirely in your browser. Nothing is uploaded or stored.
Pretty print adds indentation for reading; Minify removes all whitespace for shipping.
FAQ
What does it do with invalid JSON?
It tells you the error and tries to point at the line and column, so you can fix it instead of guessing.
Is there a size limit?
No hard limit — it runs on your machine, so it handles large pastes as fast as your device does.
Does it send my data anywhere?
No. Useful if the JSON contains API keys or customer data.