Encoding & Crypto for Student
11 encoding & crypto tools hand-picked for Student.
-
Affine Cipher Encoder & Decoder
Encrypt and decrypt the ax+b affine cipher with live modular-inverse check, browser-only
-
Atbash Cipher
Mirror the alphabet, A↔Z B↔Y, no key, self-reciprocal so the same button encodes and decodes, browser-only
-
Bacon Cipher Encoder & Decoder
Turn text into five-letter A/B groups, or read a Baconian message back — 24 and 26 letter alphabets, custom symbols, browser only
-
Caesar Cipher Encoder & Decoder
Encrypt, decrypt and brute-force a Caesar shift cipher — all 25 shifts at once, ROT13 shortcut, browser-only
-
Password Strength Checker
Check password strength — entropy, time-to-crack, breach pattern check (offline).
-
Polybius Square Cipher Encoder & Decoder
Turn letters into 5x5 grid coordinates and back, with a keyword square, origin switch and a live grid, browser-only
-
Rail Fence Cipher Encoder & Decoder
Encrypt, decrypt and brute-force a rail fence zigzag cipher, with a live grid, rail count plus offset, browser-only
-
ROT13 Encoder & Decoder
ROT13 / ROT47 / Caesar cipher — encode and decode in your browser, instant.
-
ROT47 Encoder & Decoder
Rotate all visible ASCII by 47. Digits and symbols change too, fully self-inverse, runs in your browser.
-
Text to Binary Converter
Text to binary (and back) — UTF-8 aware, 8/16/32 bit grouping, emoji safe.
-
Vigenère Cipher Encoder / Decoder
Encrypt and decrypt with a keyword, polyalphabetic shift, case kept, non-letters passed through, browser-only