PDF Watermark Tool Free
Add a custom text watermark to every page of your PDF. Control position, color, opacity, and size.
Drop your PDF here
or click to browse files
PDF Watermark Features
Full control over watermark appearance and placement.
Watermark Options
Enter any text as your watermark, such as CONFIDENTIAL, DRAFT, or your company name.
Adjust watermark transparency from subtle to fully opaque using the opacity slider.
Choose any color for your watermark text using the built-in color picker.
Output
PDF.js and Canvas API render and watermark pages quickly in the browser.
Download each watermarked page individually as a high-quality JPG image.
Your PDF never leaves your device. All processing is done locally.
How to Add a Watermark to a PDF
Upload your PDF, enter the watermark text, configure position and appearance settings, then click Add Watermark. Each page will be rendered with the watermark and made available as a downloadable JPG.
Frequently Asked Questions
Are my PDF files uploaded to a server?
No. All processing is done locally in your browser using PDF.js and the Canvas API.
Your files never leave your device at any point.
Your documents remain completely private.
Why are the output files JPG and not PDF?
Adding a text watermark directly to a PDF binary requires server-side PDF editing.
This browser-based tool renders each PDF page to a canvas and draws the watermark on top.
The result is saved as a JPG image, which is suitable for most use cases.
What positions can I use for the watermark?
Center places the watermark diagonally across the middle of the page.
Corner positions (top-left, top-right, bottom-left, bottom-right) place the text near the edges.
The center diagonal style is the most common for confidentiality watermarks.
How do I make the watermark subtle?
Lower the opacity using the slider. Values between 15 and 30 percent create a light watermark.
Use a light color such as gray or light red for a more subtle effect.
A smaller font size also reduces the visual impact of the watermark.
Can I watermark a multi-page PDF?
Yes. All pages in the PDF are processed and watermarked.
Each page appears as a downloadable JPG image after processing.
Large PDFs may take a moment to process page by page.
Is the watermark permanent?
The watermark is embedded into the rendered JPG image and cannot be removed easily.
This provides a reasonable level of protection against casual removal.
For production use cases, a server-side PDF watermarking solution is recommended.
Is there a file size limit?
There is no enforced file size limit.
Very large PDFs may take more time to render each page.
Most typical documents will process quickly.
Is this tool free?
Yes, completely free with no registration.
There are no limits on the number of files you can watermark.
No extra watermarks or branding are added to your output.