URL Encoder/Decoder

Rates a password and estimates how long a brute-force attack would take, without sending it anywhere.

Compares the execution time of several tasks you enter and presents the results side by side.

Calculates Unix file permission values from read, write and execute checkboxes and shows the chmod command.

Encodes a username and password pair into the value of an HTTP Basic Authorization header.

Hashes a string with bcrypt at a chosen salt-round count and checks a string against an existing bcrypt hash.

Locks text with a passphrase using a symmetric cipher of your pick (AES, TripleDES, Rabbit, RC4) and reverses it.