JSON FORMATTER

Paste JSON and it formats automatically — nothing leaves your browser.

JSON Editor 0 lines
1
Formatted Preview 0 lines
1
UTF-8 · 0 B Indent: 2 spaces
Waiting for input
Related tools XML Formatter JSON Viewer JSON Compare

Why Use Our JSON Formatter?

  • Instant formatting as you paste
  • Clear errors with line and column numbers
  • Reduces errors and debugging time
  • Works completely in your browser
  • Copy, download and use anywhere

Features & Supported Capabilities

  • Two-space indentation, applied consistently
  • Syntax validation with line and column errors
  • Handles files up to 10 MB
  • Optional line wrapping for long lines

About this JSON formatter, beautifier and validator

Minified JSON is compact for machines and painful for people. This free online JSON formatter pretty-prints it with clean indentation and validates it at the same time: if the JSON is invalid it points to the exact position of the syntax error, such as a missing comma, an unquoted key or a trailing comma.

It runs entirely in your browser, so API responses, tokens and config files you paste never leave your machine. From here you can explore the result in the JSON viewer, query it with the JSONPath tester, or convert it with JSON to XML, JSON to CSV or JSON to YAML.

Frequently Asked Questions

Everything you might want to know about the online JSON Formatter.

It re-indents a JSON document so objects and arrays are laid out with consistent spacing, turning minified or single-line JSON into something readable.
No. Formatting happens entirely in your browser. Your JSON is never uploaded, stored, or logged.
No, it formats valid JSON only. If there's a syntax error — a trailing comma, an unquoted key — the tool reports the line and column so you can fix it yourself.
Two spaces per nesting level, matching common JSON style conventions.
Yes. Use the Copy button to copy it to your clipboard, or Download to save it as a .json file.
You can paste text or upload a file up to 10 MB.
Yes. The document is parsed before it's formatted, so any syntax error is caught and reported immediately rather than silently ignored. Once it's valid, you can convert it to XML with JSON to XML.
Yes. Click Wrap to wrap long lines instead of scrolling sideways. Very long single-line documents also wrap automatically.
The formatter neatly indents JSON as text. The JSON Viewer turns it into a collapsible tree you can navigate, search, and copy paths from.