Encoder / Decoder
Encode and decode text in the most common formats. UTF-8 safe.
JWT Decoder
Decode a JSON Web Token and inspect its contents. The signature is not verified (that needs the secret key).
Hash Identifier
Guess what a hash could be from its format and length. A guess, not a certainty: many formats share the same length.
Classic Ciphers
Caesar, Vigenère and XOR. Handy for CTF challenges.
Subnet Calculator
Work out an IPv4 subnet from an address in CIDR notation.
Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Unix → Date
Date → Unix
Password Strength
Estimate how strong a password is. Checked locally; nothing is sent anywhere.