Secret Code Maker – printable code puzzle (PDF)
Your own text, turned into numbers or shifted letters. The task: crack the code and write the letters in the boxes. With an answer sheet, free as a PDF.
How it works & FAQHow the secret code works
Demti writes each letter of your text as a number: A = 1, B = 2 and so on. Above each number there is an empty box for the letter. Punctuation stays as it is, and words and lines keep their shape.
For more of a challenge, choose “Numbers plus one” or “Next letter”. Then it takes one extra step of thinking before the letter is clear.
Who is the secret code for?
At home and in memory training, a greeting, a saying or a seasonal poem becomes a small puzzle. Personal texts make people curious about the answer.
In elementary school, the secret code practices the alphabet and careful reading.
Adjusting the difficulty
The letter table at the bottom of the sheet helps to look letters up. Without it, the alphabet has to be counted in your head.
Short, familiar texts are easier than long ones. Larger boxes leave more room to write.
Your worksheet in five steps
- Enter a text, for example a greeting or a short poem.
- Choose the code: numbers, numbers plus one or next letter.
- If you like, adjust the letter table and the box size.
- Decide whether to add the answer sheet.
- Download the PDF and print it.
Frequently asked questions
Is the secret code free?
Yes. All worksheets on Demti are free and work without signing up. You may print and copy them at home, in groups and in the classroom.
What happens to accented letters?
They are written without the accent (É = E). German umlauts and ß are spelled out, as in many puzzle books: Ä = AE, Ö = OE, Ü = UE and ß = SS.
How long can the text be?
As long as you like. If it does not fit on one page, it continues on more pages. One to three sentences are ideal to start with.
How do I check the answers?
Add the answer sheet. It shows every letter already written in its box.