Add a Watermark to a PDF
Stamp text like CONFIDENTIAL or DRAFT diagonally across every page, right in your browser. Your file is never uploaded.
Drop a PDF here, or click to browse
Applied to every page
About this tool
This tool adds a semi-transparent diagonal text watermark to every page of your PDF, directly on your device. It's commonly used to mark a document as a draft, confidential, or sample before sharing it, or simply to make clear which version of a document is which when multiple copies are circulating.
You can set the exact text and adjust its opacity — lower opacity keeps the watermark subtle enough that the underlying document stays fully readable, while higher opacity makes it more prominent. The watermark is added as real text on the page, not an image, so the file stays small.
Keep in mind a text watermark like this is a visual marker, not a security or copy-protection measure — it doesn't prevent someone from removing it with PDF-editing software. For genuine access control, you'd want password protection instead.
Frequently asked questions
- Can I remove the watermark later?
- Not with this tool — once applied, you'd need PDF-editing software to remove it. Keep a copy of your original file if you might need an unwatermarked version later.
- Does the watermark actually protect my document?
- It's a visible deterrent and a way to mark document status, not real security — determined users can remove text watermarks with PDF-editing tools. For actual access control, use password protection instead.
- Can I change the watermark's color or angle?
- This tool currently offers a fixed gray, 45-degree diagonal style with adjustable opacity, which covers the most common use case. More customization options may be added later.
- Is my PDF uploaded anywhere?
- No — the watermark is applied entirely in your browser. Your file is never sent to a server.