Add Watermark to PDF
Stamp a text watermark across every page of a PDF. Choose colour, opacity, size and position. Works entirely in your browser.
About Add Watermark to PDF
The Add Watermark to PDF tool stamps custom text — "CONFIDENTIAL", "DRAFT", your company name — across every page of a document. Control the text, position, font size, colour and opacity, and check the result in the live preview before downloading.
The live preview helps balance visibility with readability before making any change. A pale diagonal mark can identify a review copy without hiding its contents, while an opaque corner label can show a department, owner or status. Page navigation lets you inspect the placement against different layouts in the same file.
The watermark is added as a vector text layer, so it stays sharp at any zoom or print size. Stamping runs locally in your browser and creates a new PDF, leaving the source document available if you want to test another colour or opacity.
How Add Watermark to PDF works in practice
- 1Upload the PDF you want to watermark.
- 2Type the watermark text and pick a position (diagonal centre, corners, top or bottom).
- 3Adjust font size, colour and opacity — the live preview updates instantly.
- 4Use the page arrows to check the watermark on every page.
- 5Click "Add watermark & download" to save the stamped PDF.
Jobs this tool is built for
- Mark an internal proposal as DRAFT before circulating it for comments.
- Stamp confidential reports with a visible handling reminder before sharing them with authorised reviewers.
- Add a company or department name to training handouts distributed outside the organisation.
- Label sample documents, proofs or portfolio extracts so they are not mistaken for final versions.
What you can do here
- Custom text, position, font size, colour and opacity
- Live preview with per-page navigation
- Applies to every page automatically
- Vector watermark stays sharp when printed
- Fully client-side processing
Limits and honest caveats
- The watermark is rendered as selectable text. To make it uncopyable, convert the PDF pages to images first.
- The current version applies the watermark to every page — split the PDF first if you only want some pages stamped.
Common questions about Add Watermark to PDF
Can I add an image watermark?
The current version supports text watermarks only.
What fonts are supported?
The watermark uses Helvetica Bold, one of the standard PDF fonts available in every viewer.
Can I watermark only selected pages?
Not directly in the current version. Split out the intended pages, watermark that file, and merge the sections again.
Does a watermark prevent copying or editing?
No. It is a visible text layer, not access control or digital rights management. It communicates status or ownership but does not secure the file.
This page was written by the ToolSink team to explain how Add Watermark to PDF works on this site — it is not syndicated, scraped, or spun from another publisher. How we write tool guides · Site updates · About ToolSink.
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