Add one AES-256 opening password, watermarks, or page numbers. Watermarks and page numbers are processed locally; password encryption uses temporary server processing.
Drop PDF here or click to open
Supports PDF files up to 100MB
Drag and drop or click to select your PDF file.
Choose one opening password, configure watermarks, or set up page numbers.
Download and verify the result before sharing.
Yes. OnePDFs is free to use, requires no account, and does not add an extra OnePDFs branding watermark; watermark tools add only the watermark you choose.
Watermarks and page numbers are applied locally in your browser. Password encryption sends the PDF and password over HTTPS; its temporary output is deleted after the response finishes, while interrupted leftovers enter periodic cleanup after the one-hour retention window. A browser copy can remain in this site's IndexedDB until you clear site data or the browser evicts it.
The tool supports PDFs up to 100MB. Browser-local actions depend mainly on the document and your device; processing-service actions also depend on network transfer and service availability.
No installation is needed. Some actions run locally in your browser, while the privacy answer above identifies actions that use HTTPS upload and their server-retention policy.