JSON Formatter & Pretty Printer
Paste messy JSON and get a clean, indented, readable result in one click. Everything runs locally in your browser.
Input JSON
Output
FORMAT
Tips
Paste JSON in the left pane. Output updates instantly.
Runs entirely in your browser
How it works
Pretty printing runs JSON.parse on your input to validate it and turn the text into an in-memory tree, then JSON.stringify(value, null, 2) re-serialises the tree with two-space indentation. The two-space convention matches the most common style guides and produces output that is easy to read in a diff or a pull request review.
Processing runs in your browser
All processing happens inside your browser tab. Our servers are not involved at any point.
Related operations
For converting between data formats, try CSV to JSON or the YAML formatter. To decode tokens, use the JWT decoder. For escaping URL data, try URL encode.
Frequently asked questions
- Is my JSON data sent to a server?
- All processing runs in your browser using JavaScript's built-in JSON.parse and JSON.stringify.
- What indentation does it use?
- Two spaces by default, which is the most common convention.
- What if my JSON is invalid?
- The tool will show a clear error message pointing to where the syntax breaks.
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