Diagonal text watermark
Your text runs across each page at an angle and is sized to fit the page.
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Watermark PDF
Stamp your PDF with a text watermark across every page.
🔒 Enterprise privacy — 100% client-side, no server uploads
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Drop your PDF here, or click to browse
🔒 Processed on your device — never uploaded, never stored.
What is Watermark PDF?
Watermark PDF is a free online tool that lets you stamp your PDF with a text watermark across every page. It works in your web browser with no signup. Add your PDF, choose your options and download the result. Your files stay on your device and are never uploaded.
Also searched as: add a watermark to PDF, stamp text on PDF, PDF watermark tool, mark PDF as draft or confidential.
Watermark PDF at a glance
- Price
- Free, with no paid plans
- Account
- No signup or login needed
- Where it runs
- In your web browser
- Your data
- Files are not uploaded to a server
- Works on
- Any modern browser, on desktop and mobile
- Category
- Document & PDF Suite
When to use Watermark PDF
- →Mark a document as DRAFT or CONFIDENTIAL
- →Put your name or business on shared files
- →Discourage reuse of a document you send out
How to use Watermark PDF
- 1
Open the Watermark PDF page and drop your PDF into the upload box, or click it to browse your device.
- 2
Adjust any options this tool needs — page numbers, rotation angle, or watermark text, depending on the tool.
- 3
Click the process button and watch the on-screen progress as your file is handled entirely in your browser.
- 4
Download the finished PDF straight to your device — nothing is kept on a server afterward.
Why use Watermark PDF
- ✓Runs entirely in your browser — your file is never uploaded to a server.
- ✓No account, signup, or email address required to use it.
- ✓Completely free, with no daily limit and no signup.
- ✓Works the same on Windows, Mac, Linux, and Chromebooks — anything with a modern browser.
Watermark PDF
Stamp every page with your watermark
Type a word like CONFIDENTIAL or DRAFT and it is placed diagonally across every page of your PDF.
Applied to every page
One step marks the whole document, so no page is missed.
Any wording you like
Use CONFIDENTIAL, DRAFT, your name or your business name.
Private
The PDF is marked in your browser and is not uploaded.
Quick
Type, process, download. It takes moments.
Free, no signup
No account and no limit.
Everything you need in Watermark PDF
- Diagonal text watermark
- Added to every page
- Sized to fit the page
- Any Latin-letter text
- Original file stays unchanged
- Runs in your browser
- Works on phone and computer
- Free and no signup
Tips for better results
- 1
Keep it short
One or two words read best across a page, such as DRAFT or CONFIDENTIAL.
- 2
Latin letters only
The watermark uses a standard font, so text in other scripts such as Urdu or Arabic is not supported.
- 3
A watermark is a label, not security
It discourages reuse but does not stop editing. To lock a file with a password, use Protect PDF.
0files uploaded
0signups needed
0cost to use
Tutorials on Watermark PDF
Short, practical guides that go with this tool.
🔒 Your privacy with Watermark PDF
Watermark PDF runs as client-side JavaScript inside your own browser tab. Your file or text is read, processed, and turned into a result on your device — it is never sent to, stored on, or seen by Toolkitties' servers. Closing or refreshing the page clears everything.
Frequently asked questions
Can I add an image or logo watermark?
No. This tool adds a text watermark.
Can I change the colour, size or angle?
The style is fixed: bold text placed diagonally and sized to fit the page. You choose the words.
Can I use Urdu or Arabic text?
No. The watermark uses a standard font, so only Latin letters are supported.
Does it add the watermark to every page?
Yes. Every page of the PDF gets the same watermark.
Does a watermark stop people editing my PDF?
No. It is a visible label. To control who can open the file, protect it with a password using Protect PDF.
Is my PDF uploaded?
No. The watermark is added in your browser.
Is Watermark PDF free to use?
Yes. Watermark PDF is 100% free, with no signup, no daily limit and no paid plans.
Do I need to create an account to use Watermark PDF?
No signup or login is required. Open the page and start using Watermark PDF immediately.
Is it safe to use Watermark PDF with private or sensitive files?
Yes. Watermark PDF processes your file locally in your browser using client-side code. The file itself is never uploaded to Toolkitties' servers.
Will Watermark PDF work on a large PDF?
Most PDFs process in a few seconds. Very large files (100+ MB) depend on your device's memory, since everything happens in your browser rather than on a remote server.