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.
What is the Add Watermark to PDF?
The Add Watermark to PDF tool stamps a custom text watermark across every page of your document. Use it to mark a file as "Confidential", "Draft", "Sample" or with your company name so recipients know its status at a glance.
Watermarks are a soft form of copyright protection. They discourage casual redistribution and clearly signal ownership, without needing complex DRM. This tool lets you set the text, font size, opacity, angle and colour of the watermark so it fits your brand or workflow.
The stamping happens locally in your browser. No PDFs are uploaded to a third-party server, which is important when watermarking sensitive contracts, quotations or design proofs.
How to use the Add Watermark to PDF
- 1Upload the PDF you want to watermark.
- 2Type the watermark text (for example, "CONFIDENTIAL" or your name).
- 3Adjust the font size, colour, opacity and rotation angle to taste.
- 4Preview the first page to make sure the watermark looks right.
- 5Click "Apply watermark" and download the stamped PDF.
Key features
- Custom text, font size, colour and angle
- Adjustable opacity for subtle or bold marks
- Applies to every page automatically
- Preview before download
- Preserves original document quality
- No file leaves your device
Examples
Draft contract
Add a diagonal "DRAFT" watermark to every page of a contract to prevent accidental signing.
Client proof
A design agency stamps "SAMPLE — do not print" across brochure proofs sent for approval.
Confidential report
An internal report is watermarked with the employee’s name to deter leaks.
Why use this tool
- Deters unauthorised sharing
- Marks the status of a document (draft, final, sample)
- Signals ownership without editing content
- Works on any PDF, no fonts to install
- Fully customisable appearance
Common use cases
- Marking contracts as drafts before final signing
- Distributing sample chapters of a book
- Sending client proofs of designs
- Adding "Confidential" to internal memos
- Branding reports with a company name
- Tracking leaks by stamping each recipient’s name
Frequently asked questions
Can I add an image watermark?
The current version supports text watermarks. Image watermarks are on the roadmap.
Will the watermark be selectable?
Yes, it is rendered as text, so it can be copied. To make it uncopyable, convert the PDF pages to images first.
Can I place the watermark only on certain pages?
The current version applies to every page. Split the PDF, watermark the pages you want, then merge back.
What fonts are supported?
Standard PDF fonts (Helvetica, Times, Courier) are always available. Custom fonts may be added in a future update.
Does the watermark affect print quality?
No. Watermarks are added as a vector layer on top of the page and remain sharp at any zoom or print size.