JSON Formatter
Paste JSON, get it prettified. Free, no signup, runs in your browser.
How It Works
Paste any JSON string — minified, messy, or single-line — into the input field and click Format. The output shows clean, indented JSON with 2-space indentation. If the JSON is invalid, you will see a specific error message pointing to what went wrong.
Everything runs in your browser. No server receives your data — formatting is done using JavaScript on your device.
What Is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format used by virtually every web API. It is easy for humans to read when formatted properly, but APIs and logs often return it as a single minified line.
A JSON formatter takes that compact output and adds line breaks and indentation, making it easy to read, debug, and understand the structure of the data.