ROT13 encoder/decoder

ROT13 encoder/decoder: rot13 for text—free, in-browser.

ROT13 encoder/decoder runs rot13 on plain text—handy for logs, posts, and drafts. Everything runs in your browser; nothing is uploaded to our servers.

How to use

Paste source text into ROT13 encoder/decoder.
Run the transform and scan the output panel.
Copy the result back to your editor.

FAQ

Does ROT13 encoder/decoder store my text?

No server storage—processing happens only while the tab is open.

Is there a length limit for ROT13 encoder/decoder?

Very large pastes may slow mobile browsers; split huge files if needed.

Embed this calculator

Paste the snippet on your site or blog — the widget stays responsive inside the iframe.

<iframe src="https://lagnis.com/tools/rot13-encoder/embed/" title="ROT13 encoder/decoder" loading="lazy" style="width:100%;max-width:640px;min-height:420px;border:0;border-radius:12px" referrerpolicy="strict-origin-when-cross-origin"></iframe>

Related tools

All tools · Text tools →