Editing & Signing
How to Add a Watermark to a PDF on iPhone (Free)
Add a text or image watermark to a PDF on your iPhone for free. Stamp draft or confidential pages in Safari, with no app install required.
Hamza M.
PDF Workflow Editor
A document needs its status marked across every page, such as DRAFT, CONFIDENTIAL, or your logo on a sample file. That is what a watermark does, and on an iPhone there is no built-in way to add one across a whole PDF. A browser-based tool stamps text or an image on every page for free, with no app install.
Here is how to add a watermark to a PDF on an iPhone.
Why the iPhone has no built-in watermark tool
- The Markup tools can add a single text box, but not repeat it across every page
- The Files and Books apps cannot apply watermarks to PDFs
- App Store watermark apps are almost all paid subscriptions or limited trials
Markup is fine for a one-off handwritten note on a single page. For a watermark that repeats on every page of a document, you need a dedicated tool.
Add a watermark in Safari
- 1Open the Add Watermark tool in the Safari browser on your iPhone.
- 2Tap to choose the PDF from Files, iCloud Drive, or Downloads.
- 3Type the watermark text, such as DRAFT or CONFIDENTIAL, or upload a logo image.
- 4Set the size, opacity, and position of the watermark.
- 5Choose which pages it covers, all of them or a specific range.
- 6Download the watermarked PDF.
The tool runs in your browser tab. Your PDF is processed on your iPhone and not uploaded anywhere.
Text vs. image watermarks
| Watermark | Best for | Notes |
|---|---|---|
| Text (DRAFT, CONFIDENTIAL) | Marking document status | Simple, clear, and easy to read |
| Your name or company | Claiming ownership | Readable, and light opacity works best |
| Logo or image | Branding documents | A transparent-background image looks best |
| Tiled pattern | Discouraging redistribution | Repeats the mark across the full page |
Settings worth getting right
- Opacity: a light mark keeps content readable, while a heavy mark hides text beneath it
- Size: a watermark should be noticeable but not cover the document
- Pages: place DRAFT on every page, or only on the cover
- Rotation: diagonal placement matches the typical stamp style
A watermark does not stop a determined reader from copying text, but it clearly communicates status and ownership, which is exactly what draft and sample files need. Combine it with password protection for confidential documents.
Check before you send
- Open the watermarked PDF and flip through all pages
- Confirm the watermark appears on the pages you selected
- Check it is positioned where it does not hide key text
- Send the marked file when the recipient should see the status
Adding a watermark to a PDF on an iPhone does not require an app or a subscription. A Safari-based tool stamps text or an image across your pages in seconds, fully on-device.
Do it now
Add Watermark
Add text or image watermarks. It runs in this browser tab — your file is not uploaded anywhere.
Open Add WatermarkFrequently asked questions
How do I add a watermark to a PDF on my iPhone for free?+
Open a browser-based Add Watermark tool in Safari, choose your PDF, type the watermark text or upload a logo, set the size and opacity, and download the stamped file.
Can I watermark a PDF without an app?+
Yes. Markup can add a single text box on one page, but for a watermark on every page you need a Safari-based tool, which requires no app install.
Can I use a logo as a watermark on my iPhone?+
Yes. Choose the image option in a watermark tool and select a logo from your Photos. A PNG with a transparent background looks best.
Does a watermark make the document unreadable?+
No. Set the opacity low enough that the text stays readable. Light watermarks warn about status, while heavy ones obscure content.
Are my files uploaded when I add a watermark?+
No. The tool runs in your Safari browser tab. Your PDF is processed on your iPhone and never leaves your device.