Cybersecurity & developer tools
Free, fast and practical. Most of these run entirely in your browser, so nothing you type is transmitted to us — which matters when the input is a token, a password or production data.
7 tools available · more in progress
Networking
Addressing, subnetting and IP maths
Web Security
TLS, headers and browser policy
Developer
Encode, decode, format and inspect
- JWT DecoderDecode a JSON Web Token to read its header, payload and registered claims, with expiry checked against the current time. Nothing leaves your browser.Runs in your browser
- Base64 Encoder / DecoderEncode text to Base64 or decode Base64 back to text, with full Unicode support and a URL-safe variant. Runs entirely in your browser.Runs in your browser
- JSON Formatter & ValidatorFormat, minify and validate JSON with precise error positions, so you can find the exact character where parsing failed.Runs in your browser
Cryptography
Hashing, entropy and secure randomness
Linux
Permissions, scheduling and the shell