Watermark PDF

Yes. Your file is opened and stamped by your own browser. It is never uploaded, never stored and never logged. Close the tab and nothing is left behind.

That matters for the files people usually stamp, because contracts, offers and early drafts hold private details. Here you can watermark PDF documents without handing them to a stranger. It is free, there is no sign-up, and there is no page limit.

You can insert a watermark in PDF pages in two steps: type the words, then tune how they look. CONFIDENTIAL, DRAFT, a company name or a date all work well.

The stamp starts as red text, leaning at 45 degrees, at 6 percent of the page and 30 percent opacity, and every part of that is yours to change.

• Font. A drop-down of fonts, including ones that cover Arabic, Korean and Chinese, so non-Latin words stamp cleanly.
• Color. Pick a color, or paste a hex code such as #1a73e8.
• Size. 2 to 16 percent of the page, so the stamp grows with the paper.
• Opacity. 5 to 100 percent. Low is a faint background mark. High is a bold stamp.
• Rotation. Anywhere from -90 to 90 degrees. Zero sits flat across the page.
• Layout. One stamp in the middle, or tiled so it repeats over the page.

The page preview updates as you drag each slider, so you can see your custom watermark before you save anything.

Text is not your only choice. Switch Type from Text to Image, then tap Upload image and pick a picture from your device, and your logo is placed the same way the words would be.

Scale sets how wide the image sits on the page and starts at 40 percent. Opacity, rotation, layout and the page range all still apply. A logo with a see-through background sits over a page most cleanly, since a white box around it will hide part of the text.

The picture is embedded in the file, so a stamped copy is a little larger rather than smaller. We stamped a 41 KB page with a 512 pixel logo and it came back at 47 KB, with the see-through background still see-through.

Leave the Pages box empty and every page is stamped, or type a range like 1-3,5 and only those pages get the mark.

We tested that on a 7 page file with 1-2 in the box, and only the first two pages came back stamped. The other five were untouched, pixel for pixel, which helps when a cover page or a signature page needs to stay clean.

Add one PDF and it opens in the editor, but add two or more and you get a bulk panel instead. Set the text, size, opacity, angle and layout once, and every file is stamped the same way. That is the fast way to bulk watermark PDF files for a whole folder of documents.

Files are handled one at a time, so even a large batch stays light on memory. Any file that cannot be read is skipped, and the rest still finish. Download each stamped file on its own, or take them all as one ZIP.

If a PDF opens on your device without asking for a password, it will load and get stamped here without any extra steps. If a file needs a password just to open it, frisqoo shows a small unlock box right here, you type the password, and the file is unlocked on your device so you can watermark it. Your password is used in your browser and never leaves your device. A PDF that only limits printing or copying, rather than opening, opens straight away with no prompt at all.

• Your text and images stay as they were. The stamp goes on top as a new layer.
• Page count, page size and page order all stay the same.
• Clickable links survive. A 7 page file with 206 links came back with all 206.
• Form fields survive. A fillable form with 7 named fields came back with all 7 still in place.
• The stamp cannot be peeled off later, because it becomes part of the saved page.
• File size barely moves. The file is written out fresh, so it often lands a little smaller: a 377 KB file came back at 307 KB.

If you do need a smaller file after stamping, run it through Compress PDF.

A stamp tells people how to treat a document, but it does not stop them. Anyone who opens the file can still read every word, copy the text and print the pages. The words under the stamp are not hidden and not removed.

When you need real limits, reach for a different tool. Protect PDF sets a password and controls what a reader may do. Redact PDF takes private content out of the file for good. A watermark works well next to those, not in place of them.

This tool only adds a stamp, and it cannot take a watermark off a PDF that already has one. The Remove watermark button clears the stamp you just set up, before you save. After you download, the mark is baked in, so keep your clean original.

Four things explain almost every case.

First, opacity. It starts at 30 percent, which is meant to be faint, so raise it if you want the stamp to shout. Second, size. Size is a percent of the page, so 6 percent looks smaller on a slide than on A4. Third, the Pages box. If a range is in there, the other pages stay clean on purpose. Fourth, color. Red on a dark scan is hard to read, so switch to a light color for dark pages.

A tiled layout can also crowd a busy page, so drop the size or the opacity and it settles down.

Some jobs look like a watermark but are really something else.

• For page numbers or a running header, use Page numbers.
• To place text or an image on one spot of one page, use Edit PDF.
• To black out private details for good, use Redact PDF.
• To set an open password, use Protect PDF.
• To stamp one file instead of many, join them first with Merge PDF.

Yes. The tool runs in your phone browser, just as it does on a laptop. Tap the box, pick a file from your phone or a cloud drive, and set your stamp. There is nothing to install and no account to make. The work happens on the phone itself, so it keeps going even with no signal once the page has loaded.

• Add a CONFIDENTIAL watermark to PDF copies before sending them out.
• Put a DRAFT stamp for PDF proposals that are still under review.
• Lay a company name or a date across every page of a report.
• Drop a logo on a quote so it looks like it came from you.
• Mark a whole batch of files the same way in one pass.
• Label copies so you can tell two versions apart at a glance.