Free Online Tools
Handy, in-browser tools for Linux, networking and security - no install, no signup, and nothing you enter leaves your browser.
chmod Calculator
Turn Linux file permissions into an octal chmod number, and back.
Crontab Generator
Build a cron schedule and read it back in plain English.
Subnet Calculator
Work out the network, broadcast, host range and mask from an IP and CIDR.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text, in your browser.
JWT Decoder
Decode a JSON Web Token to read its header and payload, in your browser.