About the Watermark PDF
Tezmy's Watermark PDF tool stamps text across every page of a PDF, such as CONFIDENTIAL, DRAFT, SAMPLE, COPY or your company name, so documents can't be passed off as final or reused without credit. Choose the size, colour and transparency, place it diagonally or straight, once in the middle or repeated across the whole page. It runs in your browser, so contracts and private documents are never uploaded.
Updated September 2026
How to use the Watermark PDF
- 1Click Select PDF file, or drop your PDF on the page.
- 2Type your watermark text.
- 3Adjust the size, opacity, colour, angle and layout.
- 4Click Add watermark and download your PDF.
When to use a watermark
- DRAFT: shows a document isn't final yet.
- CONFIDENTIAL: reminds readers not to share it.
- COPY or SAMPLE: stops copies from being used as originals.
- Your name or company: when sending ID copies, quotes or portfolio work, so they can't be reused without credit.
Watermark ID copies safely
When a landlord, bank or website asks for a copy of your passport or ID, a watermark like “For rental application only, 2026” makes the copy much harder to misuse. Place it across the document at medium opacity, so the details are still readable but the purpose is clear.
Getting the look right
Diagonal text across the middle is the classic style and hardest to crop out. Repeating it over the whole page protects every part. An opacity of 15–30% keeps the document readable; go higher for DRAFT or SAMPLE stamps that must stand out.
Watermark PDFs on iPhone, Android or computer
It works in any modern browser. On a phone, tap Select PDF file, choose the document, type your watermark and download the stamped copy. Because the watermark is added on your own device, private documents like contracts and ID copies are never uploaded to any server.
Watermarks and page numbers
Watermarking is often the last step before sharing. Combine documents with Merge PDF, add numbers with Add Page Numbers to PDF, then stamp the final file here. The watermark is drawn onto every page, so it prints and appears in every PDF viewer.
Features
- Any watermark text
- Custom size, colour and opacity
- Diagonal or horizontal
- Centred once or repeated
- Applied to every page
- Private: files never leave your device
Frequently asked questions
Can the watermark be removed?
It's drawn onto every page, so it can't be switched off like a comment. Determined people with PDF editing software can still remove it, so use it as a clear label, not strong protection.
What opacity should I use?
15–30% keeps the document easy to read while the watermark stays clearly visible. Use higher values for a bolder stamp.
Can I add an image or logo as a watermark?
Not yet. This tool adds text watermarks. Image watermarks are on our list.
Why are some characters missing?
The built-in PDF fonts support Western European letters. Characters outside that set are skipped for now.
Is my PDF uploaded?
No. The watermark is added in your browser.
How do I add a watermark to a PDF for free?
Select your PDF, type the watermark text, adjust the size, colour and angle, and download the watermarked copy. It's free, with no sign-up.
Can I watermark an ID card or passport copy?
Yes. Turn the photo into a PDF with JPG to PDF first, then add a watermark saying who the copy is for.
Does the watermark appear on every page?
Yes, the same watermark is added to every page of the PDF.
Which colour works best?
Grey or light red at low opacity looks professional and keeps text readable. Use a strong colour only when the stamp must stand out, like DRAFT.