Watermark PDF
Add a visible document stamp for branding, ownership, or review control in a streamlined browser-first workflow.
Up to 120 characters. The watermark is centered on every page; its font, color, and opacity are fixed.
How to use this tool
- Select one readable PDF file.
- Enter the text to place on the pages. The default is “Confidential.”
- Choose Watermark PDF and wait for local processing to finish.
- Save watermarked.pdf and review it before sharing.
Features
- Draws a visible diagonal text mark across every page.
- Uses a built-in bold font and a light gray color.
- Keeps the original source PDF unchanged.
Common use cases
- Marking a review copy as a draft.
- Adding a simple ownership or internal-use label.
- Making a document's review status visible to recipients.
Supported files and limitations
Supported inputs
- One readable PDF and up to 120 characters of watermark text.
- Basic Latin text supported by the built-in PDF font.
Limitations
- The same watermark is applied to every page; placement, opacity, color, and size are fixed.
- This is a visible label, not encryption, access control, or a tamper-proof ownership claim.
- Password-protected or damaged PDFs may fail. Editing may invalidate digital signatures.
Troubleshooting
- Some characters do not appear.
- Use basic Latin characters supported by the built-in PDF font.
- The watermark is hard to read or too large.
- Shorten the text and preview the downloaded result. This tool uses fixed placement and styling.
Privacy and security
The selected PDF and watermark are processed in the browser. The document is not uploaded; the watermarked copy is created and downloaded locally.
Frequently asked questions
Can I choose which pages receive a watermark?
No. This tool currently applies the same watermark to every page.
Does a watermark protect a PDF from copying?
No. A visible watermark labels the page but does not encrypt the document or prevent copying or editing.
Can I change the watermark appearance?
The text can be changed, but placement, font, color, size, and opacity are currently fixed.