JSON Formatter
Format, minify, and validate JSON instantly in your browser.
Everything is formatted in your browser. Nothing you paste is sent anywhere.
Tool
Paste JSON
Formatting runs locally in your browser as you type.
Why Dockzio?
Simple tools that respect your time and your privacy.
Free and instant
No subscriptions, no paywalls, no waiting.
No sign-up required
Open a tool and get to work immediately.
Private by design
Processing happens locally in your browser whenever possible.
Beautifully built
Clean, fast interfaces designed for everyday productivity.
About the JSON formatter
Paste any JSON to validate it, pretty-print it with a 2-space indent, or minify it onto a single line. Parse errors point to the exact line and column that failed.
How it works
Your text is parsed with the browser’s built-in JSON parser, then re-serialized. Formatting reflows the parsed value, so comments, trailing commas, and key order from unusual sources are not preserved — only valid, standard JSON round-trips.
Reading errors
An invalid document shows the parser’s message plus the line and column where it stopped, so you can jump straight to the problem instead of scanning the whole document.
Limits
Input up to 5,000,000 characters. Very large documents may take a moment to format on slower devices.
Privacy first
Formatting runs locally in your browser. Nothing you paste is sent to a Dockzio server.
FAQ
Quick answers to common questions.