Guide
How to play Codebreaker
Codebreaker is a daily cryptogram: every letter of the phrase was swapped for another and you rebuild the substitution to reveal it. It is free to play in the browser, with nothing to install and no login.
Play now · CodebreakerHow to play
- 1Tap a coded cell to select it, then tap a keyboard letter to assign that value; the selection auto-advances to the next cell.
- 2Use the crib: the two most frequent cipher letters come pre-solved, and the same cipher letter always shows the same letter.
- 3If two cipher letters get the same plaintext letter, the conflict warning lights up; fix it before moving on.
- 4Finish the whole phrase; your efficiency score rises the less time and fewer hints you spend.
Tips to score higher
- Each of the 3 hints reveals a correct letter but penalizes your time, so save them for when you are truly stuck.
- Turn on the Glyph variant for a cold challenge: abstract symbols replace the letters and the crib is withheld, so you decode with no foothold.
- Frequency is your ally: the most repeated cipher letter is usually a common vowel, so test there first.
Frequently asked questions
- Do I need an account or to pay?
- No. Codebreaker runs in the browser, is free, and asks for no sign-up; your progress and records are saved on your device.
- What is the difference between normal mode and the Glyph variant?
- In normal mode you get a crib (two letters pre-revealed) and see the cipher letters. The Glyph variant swaps the letters for abstract symbols and removes the crib, forcing you to deduce everything cold.