gdt.json

JSON Tools

Format, validate, minify and explore JSON with a collapsible tree viewer.

No account needed — runs in your browser open JSON Tools
A formatted document with the tree view expanded.
A formatted document with the tree view expanded.

What it does

  • Format messy JSON with proper indentation, or minify it for transport.
  • Validate and see exactly where a document is broken.
  • Explore large documents in a collapsible tree.
  • Load a file, copy the result or download it.

Who it's for

Developers and anyone handed a JSON export they need to read.

Your data

Everything happens in your browser. Nothing you type or upload is sent to the server, and nothing is stored unless the tool says it saves to your browser.