Input
Paste text on the left and get a converted result on the right.
Choose a shift from 1 to 25. Encode shifts forward, decode shifts backward.
Caesar Cipher Encoder / Decoder
Encode and decode text with a configurable Caesar shift (1-25) for cryptography practice and puzzles.
Output
What is Caesar Cipher Encoder / Decoder?
Caesar Cipher shifts letters by a fixed offset to encode or decode messages.
How to Use Caesar Cipher Encoder / Decoder
- 1Enter text
- 2Set shift value
- 3Choose encode/decode
- 4Copy transformed text
Benefits of Caesar Cipher Encoder / Decoder
- ✓Cryptography learning
- ✓Puzzle creation
- ✓Simple obfuscation
- ✓Interactive practice
Use Cases
Class projects
CTF warmups
Word games
Tips
💡
Shifts wrap around alphabet
💡
Non-letters are preserved
Related Tools
Frequently Asked Questions
Is Caesar secure?
No, it is educational and easily broken with frequency analysis.
What shift should I use?
Any shift from 1-25 works; choose based on your puzzle or lesson.
Educational Deep Dive
Caesar cipher is a foundational substitution cipher used to teach core cryptography concepts.
✓100% Free
✓No Signup
✓Browser-based (Private)
✓Last Updated: Today