How to Use
What is JSON Formatter?
JSON Formatter is a free browser-based tool for beautifying, minifying, validating, filtering and exploring JSON data. It works fully offline and never uploads your data.
How to use it
1. Paste or type JSON into the input box.
2. Switch between the three tabs.
3. In Format, click Format to beautify with type highlighting, or Minify to compress into one line.
4. In Filter by Path, enter a path such as data.*.b to collect every matching value.
5. In Structure Explorer, inspect the field tree with type badges and example values.
Path syntax examples
- data.a.b — nested field access
- data.*.b — match every element of an array
- data[0].b — access an array element by index
- $.data.a.b — optional dollar prefix
Tips
- Invalid JSON shows a readable error with the problem location.
- Nesting deeper than 100 levels is reported as a safety limit.
- Inputs larger than 2 MB trigger a performance warning.
- Use Filter by Path to debug large API responses without scanning the whole document.
Privacy
All processing happens in your browser. Nothing is sent to any server.