Open Tools Tools Features Blog About Contact Proof of Privacy

Developer utilities

Small tools for the things you would otherwise paste into a random website. These run entirely in the page, which matters when the string you are debugging is a token, a payload or a customer record.

7 tools in this category. Every one of them runs in your browser — see how that is verified.

Inspect and format

  • JSON formatter — Beautify, minify and validate JSON with error positions.
  • Hash generator — Produce MD5, SHA-1, SHA-256 and SHA-512 digests from text.

Encode and decode

  • Base64 encoder — Encode or decode Base64, UTF-8 safe, with a URL-safe option.
  • URL encoder — Percent-encode or decode URLs and query parameters.

Working with files

Useful alongside the utilities above.

Guides for these tools

  • Proof of privacy — How to confirm with DevTools that a pasted string is not transmitted.

Questions people ask

Are these tools safe for secrets?

The tools do not transmit what you paste. That said, treat any browser page as untrusted for production credentials: rotate anything you paste anywhere, here included.

Why is MD5 still offered?

MD5 and SHA-1 remain useful for checksums and for matching against legacy systems. Neither is suitable for password hashing or signatures.