Hashify (for Windows) was my first Python program. It’s really simple, and there are bound to be more functional and complete tools than this. But here it is anyway.

With Hashify you can hash either any block of text or any file with a choice of hashing algorithms:
blake2b
blake2s
md5
sha1
sha224
sha256
sha384
sha512
sha3_224
sha3_256
sha3_384
sha3_512

Open source. https://github.com/BXL909 for source code.