JSON Formatter / Validator
Format, prettify, and validate JSON online. Supports 2-space, 4-space, and tab indentation. Minify JSON to a single line. Free online tool.
Indent:
How to Use
Paste your JSON
Click Paste to paste from clipboard, or type JSON directly in the input area. A sample is available to try the tool immediately.
Choose a mode
Select Format to prettify the JSON with readable indentation, or Minify to compress it into a single line.
Adjust indentation
In Format mode, choose 2 spaces, 4 spaces, or Tab as the indentation style.
Check validation and copy
A green indicator confirms valid JSON. If the JSON is invalid, the error message shows what went wrong. Copy the output with the Copy button.