How It Works

Three steps to a perfect printable cryptogram

Type a Message

Enter your own secret phrase or pick from our kid-friendly pre-built quotes.

Choose a Cipher

Pick from Number Code, Symbol Code, Reverse Alphabet, or Caesar Shift.

Download

Export the puzzle and its solution as print-ready 300 DPI PNG files.

Features

Everything you need for cryptograms in activity books

4 Cipher Types

Number Code, Symbol Code, Reverse Alphabet, and Caesar Shift. Each one creates a unique decoding challenge for kids and adults alike.

Pre-built Quotes

Choose from kid-friendly motivational phrases and fun animal facts, or type your own custom message up to 120 characters.

Print-Ready Quality

Export at 300 DPI on US Letter or A4 paper. Clean layout with decoder key and answer boxes, ready for your activity book.

100% Free & Private

Everything runs in your browser. No upload, no server, no login. Generate unlimited cryptogram puzzles instantly.

Printable Cryptogram Puzzle Generator for Activity Books

Create professional secret code puzzles for children's activity books, brain training worksheets, or classroom printables in seconds. Choose from four cipher types — Number Code for beginners, Symbol Code for a visual challenge, Reverse Alphabet for pattern recognition, and Caesar Shift for an introduction to real cryptography. Each puzzle is generated entirely in your browser.

Type your own custom message or choose from pre-built kid-friendly quotes including motivational phrases and fun animal facts. The encoded message is displayed with blank answer boxes below each symbol, and an optional decoder key helps younger kids solve the puzzle. Download both the puzzle and solution at 300 DPI — print-ready on US Letter or A4 paper.

Frequently Asked Questions

Is the cryptogram generator really free?: Yes, 100% free with no limits. Everything runs in your browser — no account, no credits, no watermarks on the puzzle area.
What cipher types are available?: Number Code (A=1, B=2), Symbol Code (letters replaced by unique symbols), Reverse Alphabet (A=Z, B=Y), and Caesar Shift (letters shifted by a random amount).
Can I type my own secret message?: Absolutely! Type any phrase up to 120 characters. The generator normalizes it to uppercase letters and spaces automatically.
Can I use these cryptograms in a book I sell?: Yes. Puzzles you generate are yours to use commercially — in activity books, worksheets, or any other project.
Is there a decoder key for younger kids?: Yes. Toggle "Show Decoder Key" to include the full A-Z cipher mapping at the bottom of the puzzle page.
What resolution are the downloaded files?: All exports are 300 DPI PNG files sized for the selected page format (US Letter or A4). They are print-ready.

Printable Cryptogram Generator