Paste text and apply ROT13 in your browser - A-Z and a-z shift by 13; digits and punctuation stay as-is. Output updates as you type; Copy puts the current result on the clipboard.
How to use ROT13 Encoder
- Paste or type the text you want to shift into the box.
- Read the live output - Latin letters move 13 places; other characters stay unchanged.
- Click Copy to put the result on the clipboard, or paste the output back in to reverse the shift.
ROT13 Encoder
Paste text and apply ROT13 in your browser - A-Z and a-z shift by 13; digits and punctuation stay as-is.
Key features
- Output updates as you type; Copy puts the current result on the clipboard.
- ROT13 is its own inverse - run it again on the result to restore the original Latin letters.
- Does not apply Caesar shifts other than 13, and does not transliterate non-Latin scripts.
When to use it
Prefer this for puzzle spoilers, Usenet-style obfuscation demos, or quick letter-shift checks without installing an editor.
How ROT13 works
ROT13 shifts each Latin letter by 13 places, so the same action encodes and decodes - running it a second time on the result restores the original letters, while digits and punctuation stay as-is.
Privacy
Not encryption for secrecy - anyone who knows ROT13 can reverse it instantly. Nothing you paste is saved between visits.
Frequently Asked Questions
What does ROT13 Encoder do?
Paste text and apply ROT13 in your browser - A-Z and a-z shift by 13; digits and punctuation stay as-is. Output updates as you type; Copy puts the current result on the clipboard.
Is ROT13 encryption?
No. Not encryption for secrecy - anyone who knows ROT13 can reverse it instantly. ROT13 is its own inverse - run it again on the result to restore the original Latin letters.
Does my text leave this device?
No. The shift runs locally in your browser. Nothing you paste is saved between visits.