Watermark PDF
Add a custom text or image watermark to your PDF pages. Adjust its appearance, choose which pages to mark, and download a new copy.
Choose a PDF file
Drag and drop a PDF here, or select a file from your device.
One PDF at a time · Recommended maximum size: 50 MBWatermark settings
Choose a watermark type and customize its appearance.
Preview and create
Preview the first page, then apply your watermark to the selected pages.
The preview displays the first page of your PDF. Final watermark placement is calculated for each selected page.
How to Add a Watermark to a PDF Online
A watermark is a visible word, phrase, logo, or graphic placed on a document page. It can help identify the source of a file, communicate its status, or make a document easier to recognize when it is shared. Common examples include labels such as “Draft,” “Sample,” “Confidential,” and a company or creator logo.
What Is a PDF Watermark?
A PDF watermark is an additional visual element placed above or behind the original page content. It may be text or an image. A text watermark is useful when a document needs a simple status label, while an image watermark can display a logo, seal, or other brand asset. The appearance of a watermark can be adjusted through its size, color, transparency, rotation, and position.
Watermarks are often used on draft proposals, review copies, training materials, proofs, preview documents, and business paperwork. They can make the intended use of a copy clear to a reader. However, a visible watermark is not a security lock and should not be treated as proof of ownership or a substitute for access controls.
What You Can Do With This Watermark PDF Tool
This browser-based tool lets you add either a text watermark or a PNG/JPG image watermark to a PDF. For text, you can enter a short label, select a color, and set the font size. For an image, you can upload a logo or graphic and adjust its width relative to the page. Both watermark types support opacity, rotation, and placement settings.
You can apply the watermark to every page or specify a page selection. For example, enter 1-3, 5, 8-10 to mark pages one through three, page five, and pages eight through ten. The original PDF is not overwritten: the tool creates a separate watermarked copy that you can download.
How to Use the Online PDF Watermark Tool
- Select a PDF: Choose a PDF from your computer, tablet, or phone, or drag it into the upload area.
- Choose the watermark type: Select text to add a label, or image to add a PNG/JPG logo.
- Customize the appearance: Set the color and size for text, or the width for an image. Then adjust opacity, rotation, and position.
- Select pages: Keep “all” to watermark every page, or enter page numbers and ranges separated by commas.
- Create the new PDF: Select the apply button. When processing is complete, the watermarked PDF will be downloaded.
Frequently Asked Questions
1. Is this PDF watermark tool free to use?
Yes. The tool is provided for browser-based watermarking without a paid subscription. Your browser and device still need enough memory to process the selected PDF.
2. Can I add my company logo as a watermark?
Yes. Choose the image watermark option and upload a PNG or JPG file. A transparent PNG is often a good choice for logos because it can blend with the page more naturally.
3. Can I watermark only selected pages?
Yes. Enter page numbers or ranges in the page field. For example, “2-4, 7” applies the watermark to pages two, three, four, and seven. Page numbers start at one.
4. Can I change the transparency and angle?
Yes. Use the opacity slider to make the watermark lighter or stronger, and the rotation slider to change its angle. The available settings are applied when the new PDF is created.
5. Does watermarking delete the original PDF text?
No. This tool adds a visual layer over the selected pages. It does not edit or erase the original text. A watermark may cover content visually, but the underlying information can remain in the document.
6. Are my PDF files uploaded to a server?
The PDF processing is performed in your browser by the page's JavaScript libraries. The selected document is not sent to the Nawssai website by this tool. As with any online page, external library files are loaded from their CDN.
7. Can I remove an existing watermark with this tool?
No. This tool adds a new watermark. Removing an existing watermark requires a different process and may not be possible when the watermark is merged into the page content.
8. Is a visible watermark a legally valid digital signature?
No. A watermark is a visual mark, not a certificate-based digital signature. It does not verify the identity of a signer, prove when a document was signed, or provide cryptographic tamper evidence.
Choosing a Clear and Useful Watermark
A good watermark should be noticeable without making the document difficult to read. For a status label, use a short phrase and moderate transparency. A large, highly opaque watermark can obscure important paragraphs, figures, or tables. A small logo near a corner may be more suitable for branded documents, while a faint diagonal label can work for draft or preview copies.
Before sharing a watermarked document, review several pages. Documents can contain different page sizes or orientations, so a position that looks suitable on the first page may not look the same on every page. Also check that page numbers, charts, footnotes, and signatures remain readable.
Privacy, Security, and Document Limitations
This tool uses PDF-LIB in the browser to place the watermark and create a new PDF. PDF preview is provided by PDF.js. The original local file is not uploaded to a Nawssai processing server. The libraries themselves are loaded from public content delivery networks, so an internet connection is required to use the tool.
Some PDFs may not be editable by this browser-based workflow. Password-protected or encrypted files, files with unusual structures, and very large documents can fail to load or may require considerable memory. If a document is confidential, use a device and browser you trust, and do not share the finished file with people who are not authorized to see it.
Finally, a watermark is not a reliable way to prevent copying, editing, screenshots, or unauthorized distribution. For sensitive documents, combine clear document-handling rules with appropriate permissions, encryption, or a suitable digital rights management solution.
Final Thoughts
Adding a watermark can make a PDF easier to identify and can communicate whether a copy is a draft, sample, review document, or branded publication. Use the settings above to create a text or image watermark, choose the pages that need it, and download a separate copy. Always review the result before distribution, especially when the PDF contains important tables, signatures, or small print.