How to Add a Watermark to a PDF Online for Free

Watermarks serve two purposes: they mark a document's status (draft, confidential, sample) and they discourage unauthorized redistribution. Adding watermarks used to require Acrobat Pro or a server-side tool. Now you can do it for free in your browser.

When to Use Watermarks

Draft documents. Adding a "DRAFT" watermark prevents people from treating an unfinished document as final. This is especially important for contracts, proposals, and reports that go through multiple review rounds.

Confidential materials. A "CONFIDENTIAL" watermark signals that the document should not be shared outside the intended audience. It is not a security measure on its own, but it establishes clear intent.

Sample or preview files. If you sell digital products — templates, ebooks, courses — watermarking preview copies discourages people from using them without paying.

Company branding. Some organizations watermark all outgoing documents with their company name or logo for brand consistency.

Step-by-Step: Add a Watermark with EzPDF

1. Open the Watermark tool. Go to ezpdf.app/watermark in your browser.
2. Upload your PDF. Drag and drop your file or click to browse.
3. Enter your watermark text. Type the text you want to appear on every page — "DRAFT", "CONFIDENTIAL", your company name, or anything else.
4. Adjust settings. Choose the font size, color, opacity, and rotation angle. A semi-transparent diagonal watermark is the most common style.
5. Apply and download. EzPDF stamps the watermark on every page and generates your new PDF. Download it immediately.

Tips for Effective Watermarks

• Keep opacity between 15-30%. Too dark and the watermark makes the document hard to read. Too light and it is invisible. Something around 20% is usually right.
• Use diagonal placement. A watermark rotated 30-45 degrees is harder to crop out and more visible across different page layouts.
• Choose a neutral color. Gray or light red work well on most documents. Avoid bright colors that clash with the content.
• Keep text short. One or two words work best. Long text wraps awkwardly and reduces readability.

Watermarks vs. Password Protection

Watermarks are visual — they appear on the page but do not prevent someone from copying, editing, or printing the document. If you need to restrict what people can do with a PDF, use the Protect tool to add a password and set permissions. For maximum protection, use both: password-protect the file and add a watermark.

Privacy and Security

Like all EzPDF tools, watermarking happens entirely in your browser. Your PDF is never uploaded to a server. This is critical for confidential documents — the whole point of watermarking a sensitive file is to control access, and uploading it to a random website defeats that purpose.

Frequently Asked Questions

Can I remove a watermark later? Watermarks added by EzPDF are embedded in the PDF. They cannot be easily removed without the original unwatermarked file. Keep a copy of the original if you might need a clean version later.

Does the watermark appear on every page? Yes. The watermark is applied to all pages in the document.

Can I use an image as a watermark? Currently, EzPDF supports text watermarks. For image watermarks (like a logo), a desktop tool like LibreOffice Draw or Adobe Acrobat is a better option.