Hill cipher 2×2
ClientHill matrix cipher on A–Z pairs—key as four comma-separated ints mod 26.
HIAT
Nearby workflows on Toolcore
- Affine cipher encoder — Map A–Z with (ax+b) mod 26—enter a,b coprime to 26 for a valid key. for the next text or markup step in your edit loop.
- Vigenère cipher — Encrypt or decrypt A–Z with a repeating keyword—classic polyalphabetic cipher locally. for the next text or markup step in your edit loop.
- Beaufort cipher — Beaufort substitution cipher with repeating keyword. for the next text or markup step in your edit loop.
- Atbash cipher — Encode or decode text with Atbash letter substitution (a↔z)—reversible, in your browser. for the next text or markup step in your edit loop.
About this tool
2×2 Hill cipher on letter pairs—pad with X if odd length.
Common use cases
- Hill cipher 2×2 for quick local checks without uploading data.
- Copy results into tickets, docs, or classroom notes.
Common mistakes to avoid
Unexpected input shape
See the intro and how-to notes for accepted formats.
FAQ
Is processing local?
Yes—this runs entirely in your browser.
Agent prefill?
Use q or qb for the main text field when supported.
More tools
Related utilities you can open in another tab—mostly client-side.
Affine cipher encoder
ClientMap A–Z with (ax+b) mod 26—enter a,b coprime to 26 for a valid key.
Vigenère cipher
ClientEncrypt or decrypt A–Z with a repeating keyword—classic polyalphabetic cipher locally.
Beaufort cipher
ClientBeaufort substitution cipher with repeating keyword.
Atbash cipher
ClientEncode or decode text with Atbash letter substitution (a↔z)—reversible, in your browser.