Does ROT13 upload my file or text to Tool-You servers?

No. ROT13 runs in this browser tab. Files stay on the device. Limit note: Only A–Z and a–z rotate. Other characters copied. Max 200,000 characters.

Should I use Reverse Text instead of ROT13?

Use ROT13 when you need Rotate Latin letters by 13 places. Use Reverse Text when you need Reverse characters, including emoji clusters as code points. They share a category (Text) but not the same job.

ROT13

Rotate Latin letters by 13 places.

A becomes N, N becomes A. Digits and punctuation stay. Same function encodes and decodes. Not a cipher for secrets and not a full Caesar shift picker.

What ROT13 does

A becomes N, N becomes A. Digits and punctuation stay. Same function encodes and decodes. Not a cipher for secrets and not a full Caesar shift picker.

The interactive controls for ROT13 load after this article so crawlers still read the instructions. Path /rot13 is the canonical address. Work happens on this device; Tool-You does not take a copy of the file or pasted text for ROT13.

How to use ROT13

Keep this tab on ROT13 (/rot13). Pasting into the wrong Text tool (for example Reverse Text) changes the job.
Paste or type the input ROT13 expects. Path hint: rot13. Rotate Latin letters by 13 places.
Apply the ROT13 action only. Case Converter is a different transform (Switch text to lower, upper, title, sentence, camel, snake, or kebab.). A becomes N, N becomes A. Digits and punctuation stay. Same function encodes and decodes. Not a cipher for secrets and not a full Caesar shift picker.
Copy the output of ROT13 if you need it elsewhere. Size/complexity still follows: Only A–Z and a–z rotate. Other characters copied. Max 200,000 characters.
If the text job is actually Reverse characters, including emoji clusters as code points., leave ROT13 and open Reverse Text.

When not to use ROT13

Skip ROT13 when a neighbor tool matches better — start with Reverse Text or Case Converter — or when the description already warns the job will fail. In the tool’s own words: A becomes N, N becomes A. Digits and punctuation stay. Same function encodes and decodes. Not a cipher for secrets and not a full Caesar shift picker.

Questions about ROT13

What does ROT13 do that other Text pages on this site do not?: A becomes N, N becomes A. Digits and punctuation stay. Same function encodes and decodes. Not a cipher for secrets and not a full Caesar shift picker. Short version: Rotate Latin letters by 13 places.
Does ROT13 upload my file or text to Tool-You servers?: No. ROT13 runs in this browser tab. Files stay on the device. Limit note: Only A–Z and a–z rotate. Other characters copied. Max 200,000 characters.
Should I use Reverse Text instead of ROT13?: Use ROT13 when you need Rotate Latin letters by 13 places. Use Reverse Text when you need Reverse characters, including emoji clusters as code points. They share a category (Text) but not the same job.
What are the limits of ROT13?: Only A–Z and a–z rotate. Other characters copied. Max 200,000 characters. Also: A becomes N, N becomes A. Digits and punctuation stay. Same function encodes and decodes. Not a cipher for secrets and not a full Caesar shift picker.