Watermark PDF — free, private, in your browser
Watermark PDF draws a text watermark across every page of a PDF at an opacity you choose, using pdf-lib in the page. Free, no signup, 5 runs a day. It runs in your browser; nothing you add is uploaded.
📝 Watermark PDF
Stamp a text watermark across every page of your PDF. Adjust opacity, angle, and color.
About Watermark PDF
Stamp a text watermark — like CONFIDENTIAL or DRAFT — across every page of a PDF, with control over opacity, angle, and color, all in your browser. The file is never uploaded; TaimurTools writes the watermark locally on your device, so sensitive documents stay private. No signup, no watermark-on-the-watermark. Ideal for marking proposals and drafts before sharing.
- Text watermark on every page
- Adjustable opacity, angle, color
- No upload — fully private
- Free, no signup
Runs on your device
Your file is opened and processed by JavaScript inside this page. It is never uploaded and we never receive it. The page does download the processing library it needs from a public CDN the first time you use it - that request carries no part of your file.
Free tier: 5 runs per day for this tool, counted in your browser. The counter resets at midnight UTC and is not shared between browsers or devices.
How TaimurTools handles data · Why most of these tools run on your device
What this tool is for
- Marking a document DRAFT or CONFIDENTIAL before circulating it
- Labelling a sample or a proof copy
| What it does | Draws a text watermark across every page of a PDF at an opacity you choose, using pdf-lib in the page. |
|---|---|
| Accepted input | One PDF (application/pdf) plus the watermark text you type. |
| What you get back | The same PDF with the watermark drawn on every page. |
| Limits | Capped at 5 runs per day for this tool, counted in your browser and reset at midnight UTC. Text watermarks only - image watermarks are not supported. |
| Browser requirements | Any current desktop or mobile browser with JavaScript enabled. |
A worked example
- Input
- A 5-page proposal, watermark text "DRAFT", medium opacity.
- What comes back
- All 5 pages carry a diagonal "DRAFT" behind the existing content.
- Worth knowing
- This is a visual mark, not a security control. Anyone can remove it with a PDF editor - it does not protect or restrict the document.
If it does not work
The watermark hides the text underneath
Lower the opacity.
Non-Latin text comes out as boxes
The embedded standard font covers Latin characters. Watermarks in Arabic, Urdu, Chinese or similar scripts will not render correctly.
"Failed to load PDF"
The file is encrypted. Remove the password first.
Nothing happens when you run it
You may have used your 5 free runs of this tool for today. The page shows a "Daily limit reached" notice; the counter resets at midnight UTC.
How to use Watermark PDF
- Add your PDFDrop the PDF onto the upload area, or click to pick it.
- Type the watermark and set opacityEnter the text and choose how strong it should be.
- Apply and downloadClick Apply Watermark and save the result.
When to use Watermark PDF
Marking a document DRAFT before circulating it
A diagonal DRAFT across every page makes it clear the document is not final, so nobody acts on it by mistake.
Labelling a confidential copy
CONFIDENTIAL, or the recipient's name, reminds readers how the document should be handled.
Marking samples and proof copies
SAMPLE or PROOF on a design or a report signals that it is not the finished deliverable.
Identifying which copy went where
Watermarking each copy with a recipient's name makes it obvious where a forwarded copy came from.
The options, explained
Watermark PDF draws your text across every page with pdf-lib, in your browser:
- Watermark text
- Type what should appear, such as DRAFT, CONFIDENTIAL or a name.
- Opacity
- How strong the mark is. Lower values keep the page readable underneath; higher values make the mark harder to ignore.
- Every page
- The watermark is applied to all pages of the file.
- The result
- The same PDF with the text drawn diagonally across each page.
What it cannot do
- It is a visual mark, not a security control. Anyone with a PDF editor can remove it, and it does not stop copying, printing or editing.
- Text only. Image watermarks such as a logo are not supported.
- The embedded standard font covers Latin characters. Watermarks in Arabic, Urdu, Chinese or similar scripts will not render correctly.
- Encrypted PDFs cannot be opened; remove the password first. The free allowance is 5 runs per day for this tool, counted in your browser and reset at midnight UTC.
How it compares with the alternatives
Acrobat and some document tools add watermarks with image support, font choice and page ranges, and can combine them with real restrictions such as password protection. If the document genuinely needs protecting, use those controls rather than a watermark alone.
Watermark PDF is the quick way to label a document clearly before you share it, without uploading it to an online service. The watermark is added in your browser tab.
How in-browser processing works, and exactly which tools are the exception, is explained on the why client-side page.
Getting a better result
Keep it short
One word such as DRAFT reads well across a page; a long sentence becomes small and cluttered.
Start with a low opacity
The page should still be easy to read through the mark.
Use Latin characters
Non-Latin scripts come out as boxes with the built-in font.
Keep an unmarked original
The watermark is drawn into the pages.
More questions about Watermark PDF
Does a watermark protect my PDF?
No. It is a visual label that anyone with an editor can remove.
Can I use my logo as a watermark?
No. Only text watermarks are supported.
Why does my watermark show boxes?
The font covers Latin characters only. Arabic, Urdu, Chinese and similar scripts will not render.
Is my PDF uploaded?
No. The watermark is added in your browser.
Related tools
- Add Page Numbers - number the pages too
- Edit PDF - add a signature or notes
- Merge PDF - combine documents before marking them
- Compress PDF - shrink the file for email
We build fillable PDF forms, contracts, invoices and document templates that customers and staff can complete in any PDF viewer, with calculations, validation and your branding. The free tool above stays free.
Frequently asked questions
Does the watermark protect my document?
No. It is a visible mark only and can be removed by anyone with a PDF editor. Treat it as a label, not as security.
Can I use my logo as the watermark?
Not in this tool - it stamps text only.
Is the file uploaded?
No. It is watermarked in this page by pdf-lib.