JSON Formatter & Validator
Chaos to Order. Instantly debug, validate, and beautify your JSON data. Turn a wall of text into a structured, readable hierarchy.
The Language of the Web
If you are a web developer, you live and breathe JSON. It's how servers talk to browsers, how APIs trade secrets, and how configurations are saved. But machines prefer "minified" JSON—single lines of text with no spaces—which is a nightmare for humans to read.
Our JSON Formatter bridges the gap. It takes that unreadable glob of text and applies proper indentation, spacing, and tree structures, letting you spot errors and understand the data structure instantly.
Why Format JSON?
Reading raw data facilitates bugs. Formatting it exposes the logic.
Error Detection
"Unexpected token at position 452"? Good luck finding that in a minified file. Formatting breaks lines so you can see exactly where the missing comma is.
API Debugging
When an API returns a 500kb response, you need to navigate the nested objects to find the one field that's null. Tree views make this effortless.
Beautification
Indenting nested objects makes the hierarchy visual. You can see at a glance that `user.address.city` is nested three levels deep.
Minification
Sometimes you need to go the other way. Remove whitespace to reduce file size before sending data over the network.
Backend Developers
Validate API responses and configuration files. Ensure your endpoints are returning strictly valid JSON.
Frontend Developers
Paste mock data to verify the structure before coding your TypeScript interfaces or PropTyping.
Data Analysts
Convert massive log exports into readable formats to find anomalies or track down system failures.
Frequently Asked Questions
What happens if my JSON has comments?
Strict JSON does not support comments (unlike JavaScript). Our validator will flag comments as an error. You must remove them to have valid JSON.
Can it handle huge files?
Since we process data in-browser, the limit is your computer's RAM. Files up to 5-10MB are usually instant. 50MB+ might lag simply due to the DOM rendering.
Is there a dark mode?
Yes! Our entire site is built with a dark-first aesthetic, perfect for late-night coding sessions without eye strain.
Strict Validation
We validate against RFC 8259. This means keys must be double-quoted. {name: "John"} is invalid; {"name": "John"} is valid.
Data Privacy
We do not store your code. Your proprietary data never leaves your browser tab.