Cryptography Tools
Cyberchef
great for base conversions and more
Cipher detector
RSA decoder
Rot13 decoder
Barcode scanner
Md5 sum
inside of kali terminal you can run this command to get the md5sum of a file
md5sum file.xxxmd5hash generator
sha256 generator
Hyroglyphs (decoder)
Rumkin
Atbash cipher decoder