What is Watermark PDF?
Watermark PDF overlays text or an image on each page of your document. Use it to mark drafts, protect previews you send to clients, or brand documents with your logo. A preview of the first page updates as you change settings, so you know exactly what you will get before downloading.
When to use it
- Mark documents as DRAFT or CONFIDENTIAL before review.
- Add your company logo to proposals and price lists.
- Discourage reuse of sample work sent to prospective clients.
- Label copies “For KYC only” before sharing ID documents.
Tips for the best result
- 20–35% opacity keeps the document readable.
- 45° rotation is the classic diagonal watermark.
- Use a transparent PNG for logo watermarks.
Limits and privacy
A watermark is a visual overlay and can be removed by determined editing; it is not security. Encrypted PDFs must be unlocked first. Processing happens entirely in your browser, so your data never leaves your device and there is nothing to sign up for. Files are processed in your browser and never uploaded.
Related tasks
Many people who use Watermark PDF also need Add page numbers or Sign PDF, and Merge PDF is one click away. Every MondayKit tool works the same way – open the page, add your input, get the result – with no account, no watermark and no upload.