Add Watermark
About the Add Watermark
The Add Watermark tool stamps a diagonal, semi-transparent text overlay across every page of a PDF — the classic "CONFIDENTIAL," "DRAFT," or company-name watermark you've seen on countless business documents. Watermarking is one of the simplest and most effective ways to visually mark a document's status or ownership at a glance, without altering the underlying content beneath it.
You control three things: the watermark text itself (defaulting to "CONFIDENTIAL" but fully customizable to anything you need — "DRAFT," a company name, a case number, "SAMPLE," or any other label), the color using a standard color picker, and the opacity via a slider ranging from subtle (5%) to bold (80%). The tool automatically sizes the watermark text to fit proportionally across each page's width and rotates it 45 degrees, the same diagonal placement used in traditional paper watermarking, so it reads clearly without obscuring the readable content underneath.
This is a staple of professional and legal document workflows: marking a document "DRAFT" before it's finalized so no one mistakes it for the approved version, stamping "CONFIDENTIAL" across sensitive internal reports before circulating them, adding a company name or logo-text watermark to prevent unauthorized redistribution of proprietary materials, or labeling a document "SAMPLE" when sharing a preview version that shouldn't be treated as final. Because the watermark applies to every page in the document automatically, there's no need to manually stamp each page individually.
Because the watermark is drawn as a semi-transparent text layer on top of the existing page content rather than replacing it, the original text and images beneath remain fully visible and legible — the watermark is meant to be noticeable without making the underlying document unreadable. For an even more official look, consider pairing this tool with the Add Stamp tool, which offers pre-set official-looking stamps like APPROVED or REJECTED, or the PDF Signer tool if you also need to add a signature to the same document.
A tip on choosing your opacity setting: lower values around 15-25% work well when you still want the watermark clearly visible but don't want it competing for attention with the document's actual content, which is usually the right balance for something like a DRAFT label on a document people still need to read closely. Higher opacity values closer to 50-80% make sense when the watermark's message is the priority — for example, a strong CONFIDENTIAL stamp meant to be impossible to miss even in a quick glance or a low-quality printout. If you're branding a document with a company name rather than a status word, a mid-range opacity and a color that complements rather than clashes with your existing branding usually looks the most professional.
Because the watermark is embedded directly as part of the page content rather than as a separate overlay layer that could be toggled off, it remains visible consistently across every PDF viewer, every print job, and every future copy of the file — there's no risk of someone opening the document in different software and finding the watermark missing. This consistency is one of the main reasons watermarking directly into the page content, rather than relying on a viewer-specific overlay feature, remains the standard approach for marking document status. If you need more visual control over exact placement, size, and styling than a full-page watermark offers, the Add Text & Images to PDF tool lets you drag, resize, and style text or a logo anywhere on the page.
Step-by-Step Instructions
- Upload your PDF into the drop zone.
- Type your watermark text into the field (defaults to "CONFIDENTIAL").
- Choose a color using the color picker.
- Adjust the opacity slider to control how bold or subtle the watermark appears.
- Click "Add Watermark" to apply it to every page.
- Your browser downloads the result automatically as watermarked.pdf.
Benefits & Use Cases
- Marks a document's status or ownership at a glance
- Fully customizable text, color, and opacity
- Applies automatically to every page in one click
- Original content remains fully legible beneath the watermark
- Useful for drafts, confidential material, and brand protection
- Runs entirely offline in your browser