Stamp "Confidential", "Draft", your name or your logo on every page of a PDF, with control over opacity, angle, position and tiling. Nothing is uploaded.
No limits or paywall.
Use instantly, no account.
Processed inside your browser.
Clean, full-quality output.
No upload queue or waiting.
Works on phone and desktop.
A watermark tells everyone who sees a document what it is and who it belongs to: a draft that is not final, a confidential report that should not be forwarded, a portfolio sample that must not be reused, a copy issued to one specific person. Adding one in desktop PDF software usually means a paid licence, and many online tools upload your document to a server first.
This tool adds a text or logo watermark to every page of a PDF directly in your browser. Design it on a live preview, set opacity, angle, position or a repeating tiled pattern, and download the watermarked PDF. Your document never leaves your device.
Before
20-page proposal PDF
Unmarked
Easy to forward, reuse or pass off as final.
After
Same PDF, watermarked
"CONFIDENTIAL"
A semi-transparent diagonal stamp on every page; text stays selectable.
The watermark is added to each page of the original PDF, so text, links and quality are preserved. Text watermarks use the standard Helvetica font, which supports Latin characters.
Drop the PDF into the workspace above. The first page appears as a live preview.
Type your text (for example CONFIDENTIAL) or upload a logo image.
Set size, colour, opacity and rotation, choose a position, or enable tiling to repeat it across the page.
Click download: the watermark is applied to every page and you get a new PDF.
| Purpose | Watermark | Opacity | Layout |
|---|---|---|---|
| Confidential documents | "CONFIDENTIAL" | 15–25% | Diagonal, centred or tiled |
| Drafts for review | "DRAFT" | 20–30% | Diagonal, centred |
| Portfolio and samples | Your name or logo | 20–40% | Tiled across the page |
| Branded documents | Logo (PNG) | 30–60% | Corner position |
| Copies for a specific person | "Copy for J. Smith" | 15–25% | Tiled |
The tool opens your PDF with pdf-lib, a JavaScript PDF library, and draws the watermark onto each page as part of the page content: text with the standard Helvetica font, or your logo as an embedded image. Because the original pages are kept, their text stays selectable and searchable and images keep their original resolution. Only the watermark is added.
The first page is rendered as a preview so you can see exactly how the watermark will look before applying it to the whole document.
A good watermark is visible without making the document hard to read:
Text watermarks use Helvetica, one of the standard fonts built into every PDF reader. It covers English and most Western European languages, which keeps the output small and compatible. Characters outside that set, such as Hindi, Arabic, Chinese or emoji, cannot be drawn with it. For those, create your watermark text as a transparent PNG image and upload it as a logo watermark instead.
A watermark marks ownership and status and discourages casual copying, and a recipient-specific watermark makes leaks traceable. It is not encryption: anyone who can open the PDF can read it, and someone with editing software can remove overlay elements. For stronger deterrence, use a tiled, semi-transparent watermark across the whole page. For real access control, share the PDF through a system with permissions, or protect it with a password in dedicated PDF software.
The documents people watermark are usually exactly the ones that should not be uploaded anywhere: contracts, proposals, financial reports and unpublished work. Here the PDF is processed in your browser's memory and the watermarked copy is saved straight to your downloads.
The best watermark says exactly what the reader needs to know. Common choices include CONFIDENTIAL, DRAFT, SAMPLE, FOR REVIEW ONLY, NOT FOR DISTRIBUTION, or a recipient's name and date for traceable copies. Keep it short; long sentences become unreadable at low opacity.
Order matters when preparing documents. Merge everything into one PDF first with the PDF Merger, make your final edits, then watermark as the last step, so every page carries the same mark and nothing is added afterwards without it.
For a logo watermark, start from a PNG with a transparent background so only the logo itself appears on the page, not a white box. Lower the opacity until the logo is clearly visible but the text beneath remains easy to read, and use a position such as the bottom-right corner for branding, or tiling for protection. The AI Background Remover can make a transparent version of a logo that only exists on a white background.
The watermark is placed relative to each page, so mixed documents, for example A4 pages with a landscape appendix or a US Letter cover, are handled page by page. Centred and tiled watermarks adapt naturally to any page size. Corner positions keep a fixed margin from the chosen edge, which suits logos and page stamps; check the preview to make sure a corner watermark doesn't overlap headers, footers or page numbers.
Stamp reports, proposals and board papers as CONFIDENTIAL before sharing.
Mark documents as DRAFT so nobody mistakes them for the final version.
Protect design, photography and writing samples sent to prospective clients.
Put each recipient's name on their copy to discourage leaks.
Drop the PDF into the tool above, type your watermark text or upload a logo, adjust opacity, rotation and position, then download. Every page of the PDF is watermarked.
Yes. The watermark you design on the first-page preview is applied to every page of the document when you download.
No. The watermark is added to the existing pages of your PDF; text stays selectable and images keep their original quality.
Yes. Upload a PNG or JPG logo. A PNG with a transparent background looks best; lower the opacity so the page content stays readable.
Text watermarks use the standard Helvetica PDF font, which supports Latin characters (English and most Western European languages). For other scripts, create the text as a PNG image and use it as a logo watermark.
No. The PDF is read, watermarked and saved in your browser; it never leaves your device.
A watermark discourages copying and shows ownership, but someone with PDF editing software can remove overlay elements. Tiled, semi-transparent watermarks across the whole page are much harder to remove cleanly than a single corner stamp.
Encrypted PDFs need to be unlocked with their password in a PDF reader and saved without protection first.
The watermark is drawn on top of the page content. Lower the opacity to around 15–25% so the text underneath stays fully readable.
Not in this tool: every page receives the same watermark. Split the pages you need into a separate PDF first if only some should be marked.
Text watermarks add very little. A logo watermark adds the logo image once, so keep logo files small for large documents.