🔐 ROT13 / Caesar Cipher

Encode and decode text with rotation ciphers. Adjustable shift, ROT47, and brute force mode.

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Brute Force - All 25 Rotations

Free ROT13 / Caesar Cipher Tool

Apply rotation ciphers to any text with real-time encoding and decoding. ROT13 shifts each letter by 13 positions, making it its own inverse - encoding and decoding use the same operation. ROT47 extends this concept to cover numbers and symbols by rotating across the printable ASCII range (characters 33 through 126). The Caesar Cipher mode lets you choose any shift from 1 to 25. Use the brute force section to try all 25 rotations at once, which is useful for cracking an unknown shift. All processing happens entirely in your browser.