JSON Formatter & Validator
Paste any JSON, format it with readable indentation or minify it to save space. Detects syntax errors and points to the line with the problem.
Paste JSON on the left and click Format
Frequently asked questions
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and machines to parse. It is widely used in APIs, configurations and databases.
What is the difference between formatting and minifying?
Formatting adds whitespace and line breaks for readability. Minifying removes unnecessary whitespace to reduce file size — ideal for production.
Is my JSON sent to a server?
No. All processing runs locally in your browser using JavaScript. Your JSON is never sent, stored or seen by anyone else.
Does the validator point out syntax errors?
Yes. If the JSON is invalid, the parser error is shown directly, indicating what is wrong (missing quotes, extra commas, etc.).