For developers · online · free
Format JSON
Paste JSON: it becomes readable.
What the tool does
Makes JSON readable with indentation or compacts it to one line, and shows what is wrong when it is invalid.
How to use it
- Paste JSON.
- Choose indentation or "Minify".
- Copy the result.
Good to know
- Data stays in your browser, so private data is fine.
- The error message hints at where the JSON is broken.
Frequently asked questions
- What is valid JSON?
- Text that parses without errors by the format rules: double quotes for keys and strings, no extra commas.
- Is my data sent anywhere?
- No.