Is the rotation permanent?
It is saved in the file: the document will open the right way up in every PDF reader.
Does the quality change?
No: only the page orientation is changed, without recompression.
Can I rotate a single page?
Yes: click the pages to turn, then apply the rotation.
Are my files sent to a server?
No. Everything is processed in your browser, on your device: no file is sent anywhere, neither to ElniDocs nor to anyone else. You can check this by going offline once the page has loaded: the tool keeps working.
Is it free? Do I need an account?
It is free, with no sign-up, no adverts and no watermark added to your files. The only limit is your device's memory (up to 500 MB per file).