ROT13 Encoder Decoder

Convert text to and from ROT13 instantly. ROT13 is a Caesar cipher with a fixed shift of 13, so the same action both encodes and decodes. Useful for hiding spoilers, puzzle answers, and quick reversible obfuscation.

Built for rot13 workflows with instant in-browser results.

Enter text

13 chars2 words

ROT13 outputLive preview

Uryyb, Jbeyq!

Ctrl+Enter to copy | Ctrl+Z to undo

Example usage

Example input

Hello, World!

Example output

Uryyb, Jbeyq!

Batch Processing

Enter multiple inputs, one per line. Each line will be processed separately.

Input (one per line)

Results

Why this tool?

All tools run entirely in your browser no uploads, no tracking.. All processing happens in your browser so no text ever leaves your device.

Quick tips

•Outputs update live as you type.
•Use the sticky copy button to grab results quickly.
•Bookmark this page for fast access.

encoding cluster

Explore the full tool family, supporting guides, and priority pages around this workflow.

Explore all related tools

How it works

Paste the text you want to convert.
Each letter is rotated 13 places through the alphabet.
Run ROT13 again on the result to get back the original text.

Use cases

Hide spoilers, punchlines, and puzzle answers in forums.

Quickly obfuscate text in a reversible way.

Decode ROT13 messages found in games and online threads.

Demonstrate how a symmetric cipher works.

Encoding

Explore all encoding and decoding tools

Jump back to the cluster hub to browse the full tool family, the strongest money pages, and the supporting guides tied to this workflow.

Browse Encoding

Related tools in this cluster

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Letters to Numbers Converter

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Text to Hex

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Text to Binary

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Text to Base64

Encode text into Base64 safely. This Text to Base64 converter transforms plain text into Base64-encoded strings using UTF-8 encoding for secure data transmission.

Supporting guides

Numbers to Letters Calculator Explained

Learn how A1Z26 decoding works, which separators to use, and how to turn number strings into readable words quickly.

Text to Hex: Fast UTF-8 Examples for Developers

Understand how text maps to bytes and hex values with clear UTF-8 examples you can copy and test.

Conversion History

FAQ

What is ROT13?

ROT13 is a special Caesar cipher that shifts every letter 13 positions. Because the alphabet has 26 letters, applying ROT13 twice returns the original text.

How do I decode ROT13?

Just run ROT13 on the encoded text again. The same operation both encodes and decodes, so no separate decode mode is needed.

Is ROT13 secure?

No. ROT13 is meant for casual obfuscation like hiding spoilers, not for real security. Anyone can decode it instantly.