Caesar Cipher Decoder

Reverse a Caesar shift by N positions.

Decoder Text Codecs Updated Apr 20, 2026
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How to Use
  1. Type or paste your input on the left.
  2. The result appears live on the right - no buttons needed.
  3. Copy the output with one click.
Input
Output
positions (1-25; ROT13 uses 13)
More codecs: base32 encode base32 decode base58 encode base58 decode base85 encode base85 decode

About this codec

Reverse a Caesar shift by N positions.

Frequently Asked Questions

Does this leave my browser?

No - the conversion runs entirely in JavaScript on this page.

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