Create Caesar Cipher Puzzles

Encode hidden messages in Caesar cipher for scavenger hunts, escape rooms, and puzzle challenges.

ไม่ต้องเข้าสู่ระบบ

Shifts each letter by 13. Self-inverse — applying it twice returns the original.

Input

Output

Gur dhvpx oebja sbk whzcf bire gur ynml qbt.

Puzzles tips

🧩

Choose a shift of 3 (the original Caesar shift) for classic puzzle design. Players who know history will try 3 first.

💡

For harder puzzles, use a shift that doesn't have an obvious mnemonic. Shift 7 or 17 are harder to guess than 1, 3, or 13.

🔍

Frequency analysis: in English, E is the most common letter. If you see lots of H in the ciphertext, the shift might be 3 (E+3=H).

🎯

For escape rooms, hide the shift number in a visual clue. A clock showing 7 o'clock is the key to a shift-7 cipher.

ป้อนข้อมูล

Enter your data into the tool above. Everything stays local to your browser.

ประมวลผล

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

ดาวน์โหลด

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

✓ฟรีสมบูรณ์ — ไม่มีค่าใช้จ่ายซ่อนเร้น ตลอดไป

✓ไม่ต้องมีบัญชี อีเมล หรือเข้าสู่ระบบ

✓ไฟล์ไม่เคยออกจากอุปกรณ์ของคุณ

✓ไม่มีขีดจำกัดขนาดไฟล์ใดๆ

✓ไม่มีลายน้ำในผลลัพธ์ใดๆ

Encode and Decode ROT13

Use ROT13 to obscure text — the go-to cipher for s

Learn Classical Cryptography

Explore Caesar, Atbash, and Vigenère ciphers to un

Send Secret Messages

Encode personal messages, notes, and private commu

Apply the Atbash Cipher

Reverse the alphabet with Atbash: A becomes Z, B b