Tools / Text & Data / JSON Formatter
Client-side

JSON Formatter

Format, minify, or validate JSON locally in your browser with 2- or 4-space indentation, so sensitive API payloads never leave the tab.

What it does

  • Pretty-print JSON with 2 or 4-space indentation
  • Minify JSON to a single line
  • Validate JSON syntax with error reporting
  • Runs via WebAssembly, no data sent externally
Indent

API payloads often carry bearer tokens or internal field names, and the JSON formatting guide makes the point clearly: "if the sample should stay private, the formatter should stay local" — format or validate here without pasting sensitive data externally.