Add a Watermark to a PDF
A watermark tells readers that a document is a draft, confidential or not for distribution. Choose the text, colour, size, opacity and angle, or tile it across the page for documents that must be hard to reuse.
Key facts
- Category
- PDF & Documents
- Price
- Free
- Account
- Not required
- Processing
- In your browser
- Input
- Local files or pasted data
- Platform
- Modern desktop and mobile browsers
What it does
A watermark tells readers that a document is a draft, confidential or not for distribution. Choose the text, colour, size, opacity and angle, or tile it across the page for documents that must be hard to reuse.
Stamp custom text across every page with colour, opacity and rotation controls.
How to use it
Here is the short version of using Watermark PDF.
- Open the PDF — The watermark is applied to every page in the document.
- Style the stamp — Pick a colour and opacity, then set the size and rotation. Tiling repeats it across the page.
- Apply and download — The text is embedded as vector text, so it stays sharp at any zoom level.
Features that matter
What Watermark PDF does well.
- Nothing leaves your device — The work happens in your browser tab. There is no upload endpoint in this app, so your files and text cannot be stored, logged or seen by us.
- No upload wait — You skip the round trip to a server entirely. Results are limited by your own CPU, not by network speed or queue size.
- Free, no account, no quotas — No sign-up wall, no watermark, no daily limit. Optional accounts only exist to save favourites and presets across devices.
Frequently asked questions
Is my PDF safe to use here?
Yes. This tool runs entirely in your browser using JavaScript. Nothing you paste or open is sent to a server, and the page keeps no copy after you close it.
Do I need to create an account?
No. Every tool is fully usable without signing in. An account only adds saved favourites and reusable presets.
Does it work on a phone?
Yes. The interface is mobile-first with large touch targets and a stacked layout, so it works on phones and tablets as well as desktops.
Can a watermark be removed?
Any visible overlay can be cropped or painted over. Treat a watermark as a deterrent, not as encryption. For strong protection, rasterise the final pages or use access controls.
What opacity should I use?
Around 15–25% keeps the underlying text readable while making the stamp obvious. Increase it for documents that should not be reused.
Open Add a Watermark to a PDF
Try it now — it runs in your browser and needs no account.
Open the tool