The week of codes
The week climbs from easy to hard, so you can start on Monday and grow into Sunday.
- Monday, A1Z26: numbers for letters. See the letter to number converter.
- Tuesday, Caesar: one secret shift for the whole message. See the Caesar cipher decoder.
- Wednesday, Atbash: the alphabet flipped. See the Atbash cipher.
- Thursday, Morse: dots and dashes. See the Morse code translator.
- Friday, braille: patterns of raised dots. See the braille translator.
- Saturday, Wingdings: little pictures. See the Wingdings translator.
- Sunday, mixed alphabet: no key to look up, just logic. Practice with the daily cryptogram.
How to play
- Tap a symbol, then tap the letter you think it stands for. It fills in everywhere that symbol appears.
- Use the words you can see to guess the rest. One word often unlocks several others.
- Stuck? Try Reveal letter, Check or Show the key. Each one counts as a hint.
When you finish, a short note explains how the day's cipher works, and you can share your result without giving the answer away.
More games
Want more? Practice mode gives you unlimited puzzles from every day of the week. You can also race the clock in Cipher Sprint or play all our games.