Drop a PDF to overlay a text or image watermark — it is applied in your browser and your file never leaves your device.
How it works
- Text or image watermarks — upload a logo PNG/JPG to stamp your brand across pages.
- Tiled repeats the watermark across the entire page (much harder to crop out than a single center mark). Diagonal band draws one large angled stamp.
- Apply to all pages, just the first page, or a custom list.
- Note: a visual watermark is a deterrent, not security — it can be removed by someone determined. For real protection you'd need PDF encryption/permissions, which this tool doesn't do.
- A short ad plays before your download starts — it helps keep this tool free. Processing itself happens instantly; the ad is just a brief pause before the file downloads.
- All processing happens locally in your browser using pdf-lib — your files are never uploaded anywhere.
A watermark should have one clear job
A useful watermark normally answers one question.
Is the document a draft?
Is it confidential?
Which department or organization owns the copy?
Is it an internal working document?
A watermark becomes less useful when it tries to communicate several messages at once.
Use opacity as a readability control. A watermark should remain visible without making the underlying document difficult to read. Check it on normal-sized text, tables, signatures and charts instead of judging it only on a large screen.
Text and logos serve slightly different purposes. A text mark such as "DRAFT" or "CONFIDENTIAL" is immediately understandable. A logo can be useful for branding or ownership. Pick the smallest visual intervention that serves the purpose.
Most importantly, do not confuse watermarking with document security.
A watermark is a visual label. It does not, by itself, stop copying, screenshots, redistribution or extraction. Password protection, encryption and access control are separate security measures.
Keep a clean original and make the watermarked file a separate copy. That makes it easier to create a different version later without stacking multiple watermarks on the same source.
Learn how to watermark a PDF without making it hard to read →
Frequently asked questions
Can I watermark every page at once?
Yes. The tool can apply a text or logo watermark across the document, including repeated placement when a tiled mark is appropriate.
Can I make a watermark lighter?
Yes. Use opacity to keep the mark visible without overpowering the underlying content.
Should I use text or a logo?
Use text when the purpose is immediately communicating a status such as "DRAFT" or "CONFIDENTIAL". Use a logo when the purpose is branding or identifying the source. Avoid combining too many elements.
Are my PDFs uploaded?
The watermarking process runs in your browser, so the PDF and watermark asset remain in the local browser workflow rather than being sent to an AllDays processing server.
What a watermark does
A watermark overlays text or an image on top of each page — a word like DRAFT or CONFIDENTIAL, a company name, or a logo. It sits above the existing content, so the original pages show through underneath. It's a visual mark, added to every page you choose.
Opacity and placement
Opacity controls how see-through the mark is. A low opacity lets the page content remain readable beneath a faint stamp; a higher opacity makes the watermark more prominent but can obscure text. Where you place it — across the middle, in a corner, tiled — is a trade-off between visibility and keeping the page legible.
A watermark is not access control
This is worth being clear about: a watermark is a visible label, not security. It doesn't stop anyone from opening, copying, or printing the document — it just marks it. If you need to restrict what people can do with a file, that's password protection or encryption, which is a different thing entirely.
Watermarks predate digital documents
Paper makers historically used marks visible through paper to identify origin or manufacture. Digital watermarking borrowed the idea of placing identifying information over or within a document.
Visible watermarking is not encryption
A watermark can communicate ownership, status or confidentiality, but it does not stop someone from reading the document. It solves a different problem from access control.