Offline, always

Simple tools for everyday analysis.

Safely format an address, convert text, hash a file or read a JWT token. These calculations stay on your device.

What do I enter?

Text, an address, a file or a JWT token, depending on the section.

Safe-to-share address text, encoded or decoded content, hashes and decoded JWT fields.

How to use it: 1. Choose one of the four tool panels. 2. Enter your input. 3. Click an action and copy the result if needed.

New to these terms? See quick explanations

Defang: Changes an address so it is harder to click accidentally when shared.
Base64 / hex: Ways to represent data, not ways to keep it secret.
Hash: A fingerprint of text or a file that can be compared with another hash.
JWT: A token format used by applications. Reading a token does not verify its signature.

Make links and emails safe to paste into reports and chats, or restore them.

Input

Output

Base64 (standard or URL-safe), URL, hex and ROT13.

Format

SHA-1, SHA-256, SHA-384 and SHA-512 of text or a file (up to 512 MB). MD5 is not offered by browsers.

…or choose a file

Compare with an expected hash

Decodes the header and payload. It does not verify the signature, so never treat a decoded token as trusted.