How to Add a Watermark to a PDF (DRAFT, CONFIDENTIAL, Logo)

How do you add a watermark to a PDF for free?

Open Add Watermark, choose the PDF, type the text or pick a logo, set opacity and position in the live preview, and download the stamped copy. The file is processed in the browser and is not uploaded.

• Choose the PDF. Files up to 200 MB are accepted, and the first page appears in the preview.
• Pick Text and type the wording, or pick Image and select a logo. A PNG with a transparent background looks best.
• Set font size, color, opacity and rotation. The tool starts at 30% opacity and 45°, which is the classic diagonal stamp.
• Choose a single watermark in one of nine positions, or tile it across the whole page.
• Apply it to all pages or a range such as 2-10, then download the new file.

Choose wording that does the job

Short wording works best. A long sentence repeated diagonally becomes unreadable at low opacity, while one word or a name and date stay legible.

• DRAFT: when the document is final, generate a new PDF from the source. Do not try to edit the watermark out of the draft.
• CONFIDENTIAL: pair it with a line in the email. The watermark reminds; the message sets the rule.
• Recipient-specific, such as “Prepared for Northwind Ltd – 12 Sept 2026”: if the document leaks, you know which copy it was, and people are less likely to share something with their own name on it.

Watermark your ID copies

When a landlord, employer or hotel asks for a copy of your passport or driving licence, a watermark stating the recipient, purpose and date (“Copy for ABC Lettings – tenancy application – Sept 2026”) makes the scan much less useful to anyone who later steals it. Place it across the photo and the document number at moderate opacity so the document is still readable but not reusable.

If the ID is a photo from the phone, turn it into a PDF first with JPG to PDF, then add the watermark. Check whether the recipient allows it; a few official processes require an unmarked copy.

Design tips

• Light gray or the brand color at low opacity reads as a watermark. Solid black reads as a stamp and distracts.
• For documents people must read, stay around 15–30% opacity. Heavier marks make printing and photocopying worse.
• Center diagonal placement covers the most content, which matters for preview copies. A corner suits branding.
• Use a logo at least 1,000 pixels wide. A small logo scaled up looks blurred in the PDF.
• Check a page with a dark photo or table. A gray watermark can disappear on dark areas, so a different color or slightly higher opacity may be needed.
• Text watermarks use the standard PDF fonts, which cover Western European characters. For Arabic, Chinese, Cyrillic or other scripts, make an image of the text and use an image watermark.

Single or tiled, and in what order?

A single watermark suits status words such as DRAFT, where the aim is to inform. A tiled watermark suits ownership and tracing, where the aim is to make removal tedious. The tiled layout staggers the text across the whole page, so a smaller font, around 24–36 pt, gives more repeats and better coverage than one large word.

Order matters when several steps are involved. Combine files first with Merge PDF, so the mark is identical on every page. Add page numbers before the watermark so the numbers stay crisp underneath it. Watermark next. Compress after that if the file is too large for email. Add a password last, because an encrypted file has to be unlocked again for every later edit.

Watermarking copies for several recipients

When the same document goes to several people, create one copy per recipient with their name in the watermark. Put the recipient's name in the file name too, so you never attach the wrong copy. Work from the same clean original each time; do not watermark a file that already carries someone else's name.

A tiled layout suits this purpose. A single centered name can be covered with one white rectangle, while a tiled pattern runs through every paragraph and is tedious to remove.

Can a watermark be removed from a PDF?

Yes, by someone with editing software and patience, so treat a watermark as a deterrent and an identifier, not as protection. It discourages casual misuse and tells you which copy leaked. It does not stop copying.

How hard removal is depends on how the mark was added. Some tools add a watermark as a separate annotation or optional layer, which the PDF specification, ISO 32000-2, allows and which an editor can delete in one click. Add Watermark draws the mark into the page content itself, which is harder to isolate, particularly when tiled. The text underneath stays selectable and searchable either way.

Should you watermark in Word or in the final PDF?

Watermark in the source application when you own the source and need one version. Watermark the PDF when files come from different sources, when you cannot edit the original, or when you need several recipient-specific copies.