Watermark PDF
Drop a PDF here or click to choose
Choose a PDF, then set the words or an image.
Stamp the same text or picture on every page, faint enough to read the page underneath. Check the download. A watermark is not security.
How to use
- Open the PDF. Type a short label such as DRAFT or CONFIDENTIAL, or choose a PNG or JPG. If both are set, the image is used and the words are ignored until you clear the image.
- Pick diagonal, tiled, center, or bottom right. Opacity is how solid the mark is. Width is how much of the page width the mark uses. A long word is shrunk so it stays inside that width.
- Add the watermark and download. The same mark is placed on each of the first 40 pages.
A watermark is a stamp, not a lock
The mark is painted into the page content. A reader sees it. It does not encrypt the file, and it does not stop copy and paste of the text underneath. Someone with a PDF editor can cover the mark, crop it off with Crop PDF if you parked it in a margin, or export the page as an image and paint over it. If the file must not open without a password, use Protect PDF after the watermark is in place.
Text is drawn with a plain sans. Keep the label short. Accented Latin letters such as é usually work. Chinese, Japanese, and Korean are not a good fit: the stamp has no font for those characters. For a logo, upload a PNG with a transparent background. A JPEG will bring its own rectangle, including a white box around the logo. Clear the image to go back to the words.
Diagonal and tiled marks are built to the shape of each page, so a landscape sheet does not get a portrait stamp squeezed into the wrong aspect. Center and bottom right keep the mark's own aspect ratio and place that one mark, not a full-page picture. Width applies in every layout. Opacity in the download matches the slider. The preview uses the same value.
The original text stays selectable, unlike Compress PDF. The watermark itself is an image sitting on top. If you need a page number as well, add page numbers first or second. Order only matters where they overlap. A bottom-right logo and a bottom-right number will collide. Move one of them.
What this will not do
It will not make the mark undeletable. It will not apply a different phrase on each page. It will not rotate only some pages. Use Organize PDF if a page is sideways before you watermark, so the diagonal reads the way you expect on every sheet.
Very wide images are scaled down to the width you set. They are not sharpened. A tiny logo stretched to 80 percent of the page will look soft. Start near 30 percent for a corner mark and near 55 percent for a diagonal word.
Files that already ask for a password are refused. This tool does not remove passwords. Forty pages is the limit so the tab can build the new file without stalling. Split a longer PDF, watermark each part, then merge.
Questions
Can people still copy the text?
Yes. The watermark does not turn the page into a picture. Use Protect PDF if you need an open password. Permission flags are a weaker request and are explained on that page.
Does a white logo box disappear?
No. JPEG has no transparency. Export the logo as PNG if the page should show through around the mark.
Is the file uploaded?
No. The PDF and the logo are read in this tab. Nothing is sent to a server for the watermark itself. The page still loads the PDF libraries from a public CDN, which needs a network connection the first time.
Why is 100% opacity not offered?
A fully solid stamp hides the page. The slider stops at 80% so a draft mark stays readable. Covering a secret is a different job. See Redact PDF, and read its limit.