Coded message generator

Create an encoded message with its explained solution.

Codes

Encode a message with Caesar, ROT13, Atbash, A1Z26, Morse, binary, hexadecimal, Polybius, Tap code, Bacon, substitution alphabet, or Vigenère, then export the solution.

Settings

Encoding method

Caesar shift

Vigenère key

Morse style

Plain message

0 source char.

Encoded message

Add a plain message.

Solution

Report a bug

Quick explanation

Enter a plain message, choose the encoding method, then retrieve the encoded message and a written solution for the organizer. You can copy, download, or print everything.

Try this too

Need to test several decodings?

Use the Multi-tool decoder to quickly compare ROT13, Atbash, mirror readings, and all 25 possible Caesar shifts.

Try this tool

Additional information

Create an encoded puzzle with its solution

This generator is made for preparing a hidden message in a treasure hunt, home escape game, puzzle trail, or printed riddle. You write the plain message, choose a method, then retrieve both the encoded message and the solution to keep for the organizer.

A creation tool

Unlike a training tool, the solution stays visible. The goal is to build a clean puzzle, not to hide the answer from you.

Simple or technical codes

Caesar, ROT13, and Atbash are quick to explain. Morse, Polybius, Tap code, Bacon, binary, or hexadecimal create a more mysterious look.

Ready to print

Copy or download the encoded message alone, or export the complete sheet with plain message, encoded message, and explanation. The print button prepares a readable A4 page.

Which method should you choose?

Method	Effect	Good use
Caesar / ROT13 / Atbash	Very readable letter substitution.	First puzzle, beginners, easy clue to reveal.
A1Z26	Turns letters into numbers.	Number sequences, fake safe codes, coordinate-style clues.
Disguised Morse	Replaces dots and dashes with other symbols.	Less obvious than classic Morse while staying explainable.
Polybius / Tap code	Uses a 5×5 grid and coordinates.	Grid, square, tap, or rhythm-based puzzles.
Bacon	Produces five-symbol A/B groups.	Visual messages using two shapes, colors, or fonts.
Binary / hexadecimal	Displays the text bytes.	Computer, terminal, robot, or laboratory mood.
Substitution alphabet / Vigenère	Uses a key to keep.	Harder puzzle where the solution is essential.

Good to know

These methods are playful and educational: they help create a challenge, but they do not protect sensitive information. To fine-tune a method, use the dedicated tools: Caesar cipher, Vigenère cipher, Morse code, Polybius square, Tap code, Bacon cipher, Binary code, or Hexadecimal code.

Limits and reuse

AppErgo tools are provided free of charge for practical and informational purposes. Although care is taken in their design, a result may be incomplete, unexpected or incorrect. Before relying on a result for any important use, check it using an appropriate method.

To report a bug in the tool, you can use the dedicated bug report form.

Results produced by AppErgo tools may be copied and reused freely. When publicly reusing a result, a method or an AppErgo page, a link to the relevant page is appreciated.

Unless otherwise stated, AppErgo texts, images, visual elements, scripts, templates and internal components remain the property of AppErgo.

For any other request, you can contact the webmaster.