Add Watermark to PDF

Add Watermark to PDF is built for people who need a visible review mark, draft label, or ownership stamp without sending the document to a hosted watermark service. The same local Plain Tools watermark workflow runs here, so you can place text or image watermarks, adjust opacity and position, and review the result before download.

What this tool does

Apply text or image watermarks to PDF pages locally with opacity, position, size, and review-copy controls.

This landing page uses the same underlying workflow as Add Watermark to PDF. The core operation runs locally in your browser, so the file stays on your device during processing.

Step-by-step instructions

1Upload the PDF and choose whether you want a text watermark or an image watermark.
2Adjust opacity, size, placement, and repeat settings until the preview matches your intended output.
3Export the finished PDF locally and review a few pages before sending it onward.

Tool workspace

Open the live tool here or jump to Add Watermark to PDF.

Add watermark to every page

Add text or image watermark overlays locally in your browser. Files never leave your device.

Drop a PDF here, or click to browse

Local-only processing with no upload step

Click or drop files to continue

Watermark options

Upload a PDF and configure your watermark options.

Watermark text

Position

Opacity (0.25)

Rotation angle (35°)

Text size (42px)

Text colour

Apply watermark

Watermark is applied to each page in a new output file.

Why Plain.tools is private

No upload step

The core file workflow on this page runs in your browser, so the document does not need to be sent to a Plain.tools server to complete the task.

Easy to verify

You can inspect browser network requests yourself while using the tool and confirm whether file bytes are being transmitted.

Built for task flow

The aim is to let you finish a PDF job quickly without account friction, upload queues, or hidden processing steps that are hard to audit.

Limitations and checks

Check a few pages after export to confirm the watermark does not cover signatures, page numbers, or fine print.
Large PDFs can take longer because every page needs a local watermark pass before download.
If the watermark is only for review, keep an unmarked source copy for the final release workflow.

FAQ

Can I add a watermark to PDF files without uploading them?

Yes. This page uses the local watermark workflow, so the PDF stays on your device during the core processing step.

Can I use an image as the watermark?

Yes. You can apply either text or image watermarks and adjust their scale, opacity, and placement.

Should I watermark the final release copy?

Usually only if the recipient actually needs the watermark. Draft, review, and internal versions are the most common cases.