JSON · Data
JSON Formatter & Validator online
Paste your JSON, check that it is valid and turn it into a clear, readable format.
JSON tool
Input limit: 1 MB. Content is processed in this browser.
Quick guide
What is a JSON formatter?
A JSON formatter arranges objects and arrays with readable indentation. It is useful for reviewing API responses, configuration files and data exchanged between applications.
What does this tool validate?
It detects missing commas, incorrect quotes, unclosed braces, malformed arrays and other invalid characters. It also checks booleans, numbers and null.
Why format JSON?
Well-presented JSON makes reading, debugging and reviewing API responses easier. Minification removes whitespace to create a compact version.
Frequently asked questions
Questions about JSON
What is JSON?
JSON is a lightweight text format for exchanging data between applications.
How can I tell if JSON is valid?
Paste it into the tool and select Validate to check its syntax.
Is the entered JSON stored?
No. It is processed locally in the browser and is not sent to the server.
Can I minify JSON?
Yes. Select Minify to remove unnecessary whitespace and indentation.
What is the difference between formatting and validating JSON?
Validation checks syntax; formatting rearranges valid JSON to make it easier to read.
