Free PDF Watermark Tool

The Add Watermark tool is a free online utility that adds text or image watermarks to your PDF documents for branding or copyright protection.

Yes, it is completely free with no registration required. All processing happens client-side in your browser.

Yes, the Add Watermark tool lets you adjust the text, font, size, color, opacity, and position of your watermark on PDF pages.

Absolutely. The PDF Watermark Tool processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the PDF Watermark Tool is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the PDF Watermark Tool in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Since the PDF Watermark Tool processes files in your browser, the size limit depends on your device's memory. Most devices can handle PDFs up to 50-100MB without issues.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The PDF Watermark Tool works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

A text watermark stamps a word or phrase you type onto the page, rendered in Helvetica Bold with control over font size, color, opacity, and angle. It is ideal for status labels like CONFIDENTIAL, DRAFT, or SAMPLE, which this tool offers as one-click presets. An image watermark instead overlays a picture you upload — typically a company logo or a scanned signature in PNG or JPEG — with its own scale and opacity sliders. PNG transparency is preserved, so a logo on a clear background sits cleanly over your content. In short, choose a text watermark to mark a document's status or ownership in words, and an image watermark to brand it with a visual mark. This tool supports both: pick the text or image tab, configure it, and download the stamped PDF.

A watermark is meant to be a faint overlay that signals status or ownership without hiding the words beneath it, so a light setting works best. In practice a value around 25 to 35 percent keeps the underlying text fully readable while the mark stays clearly visible. Go lower, near 5 to 15 percent, when you want a subtle background brand; go higher, toward 50 percent or more, only when the goal is to make copying or reuse obviously discouraged. This tool's opacity slider runs from 5 to 100 percent for both text and image watermarks, and the live preview shows roughly how your choice will look before you commit. Start at 30 percent, glance at the preview over your actual page, and nudge it until the balance feels right, then download the result.

By default the watermark is applied to every page, but you can limit it to a selection by entering a page range. Type comma-separated pages and hyphenated spans together, such as "1-3, 5", and the tool reads them as pages one through three plus page five. This is useful when only a cover page needs your logo, or only the body of a document should carry a SAMPLE stamp, while the rest stays clean. The output keeps your original page count and downloads as a fresh file with a "_watermarked" suffix, so your source PDF is never altered. Pages outside the range you specify are left exactly as they were. Open the tool, load your PDF, type the range you need in the page field, then preview and download the stamped copy.

A single stamp places one watermark in a chosen spot — diagonally, centered, in a corner, or as a header or footer band. Tile mode instead repeats the watermark in a grid across the entire page, and you control the spacing between repeats from 80 to 300 pixels. The practical reason to choose tiling is protection: a single mark can be cropped out or painted over fairly easily, whereas a tiled, low-opacity pattern covers the whole page and is far harder to remove cleanly. Use a single stamp when you simply want to label a document's status, and switch to tile mode when your goal is discouraging redistribution or screenshots of sensitive material. The live preview reflects your spacing as you adjust it. Toggle Tile Pattern in the tool, set the spacing, and download.

Yes. Switch to the image watermark option and upload a PNG or JPEG of your logo or signature. If your file is a PNG with a transparent background, that transparency is preserved when the image is embedded, so the logo sits over your page without an opaque white box around it — which is why PNG is the better format for branding. You can adjust the image scale from 10 to 200 percent of its native size and set its opacity independently, so a large logo can be shrunk and softened to sit discreetly behind your text. JPEG files work too but are best for photos or marks that already have a solid background. Drop your PDF and logo into the tool, tune the scale and opacity in the preview, then download the branded file.