Add Watermark to PDF Online
Add a custom text watermark to every page of your PDF document. Choose your text, color, size, and opacity. Free, private, and processed entirely in your browser.
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About This Tool
How to Use
- 1Click the upload area or drag and drop your PDF file (up to 100 MB).
- 2Enter your desired watermark text (e.g., "CONFIDENTIAL", "DRAFT", "SAMPLE").
- 3Adjust the font size, opacity, and color settings to your preference.
- 4Click "Process File" to apply the watermark to every page.
- 5Preview the result and download your watermarked PDF.
When to Use
- •When sharing sensitive documents that need to be clearly marked as confidential or restricted.
- •When distributing draft versions of documents that should not be treated as final.
- •When sending sample documents or proposals that need a visible "SAMPLE" or "PREVIEW" stamp.
- •When branding documents with your company name or copyright notice.
- •When protecting documents from unauthorized redistribution by adding visible ownership marks.
Tips & Tricks
- ✨Use a low opacity (0.10-0.20) for subtle watermarks that do not interfere with reading the content.
- ✨Use a higher opacity (0.30-0.50) when you want the watermark to be immediately noticeable.
- ✨Gray is the most professional and least intrusive color for most business documents.
- ✨Red is ideal for urgent markings like "CONFIDENTIAL" or "DO NOT DISTRIBUTE".
- ✨Keep watermark text short (1-3 words) for the best visual result. Longer text may extend beyond the page.
- ✨Adjust the font size based on your page size — larger pages may need bigger text for visibility.
Frequently Asked Questions
No. All processing happens entirely in your browser using client-side JavaScript. Your PDF is never sent to any server, ensuring complete privacy and security.
Yes. You can enter any text you want as the watermark, such as "CONFIDENTIAL", "DRAFT", "SAMPLE", your company name, or any other text.
Yes. The watermark is applied diagonally across every page of the PDF document, ensuring consistent marking throughout.
The watermark is embedded directly into the PDF content. To get an unwatermarked version, you would need to go back to the original file. We recommend keeping a copy of the original before watermarking.
No. The watermark is added as a text overlay on top of existing content. The original text, images, and formatting remain completely unchanged and at their original quality.
The tool supports PDF files up to 100 MB. Since processing happens in your browser, speed depends on your device and the number of pages.
Currently, only text watermarks are supported. Image watermark support may be added in a future update. For now, you can use text to add company names, dates, or status labels.
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