PDF Watermark

This free PDF watermark tool stamps text or an image across your document and adds page numbers in the same pass. Type a label like DRAFT or upload a logo, then set the font, color, size, opacity, rotation, and position on a nine-point grid — or tile it as a mosaic — with a live preview on every page. It runs entirely in your browser: your PDF is processed on your own device and never uploaded to a server.

How to use the PDF watermark tool

1. Drop in your PDF. Drag the file onto the upload area or click to browse. The tool renders a thumbnail of every page so you can see exactly where the watermark will land — nothing is uploaded, the file is read directly on your device.
2. Choose text or image. Switch between the Place text and Place image tabs. For text, type up to 64 characters (the field defaults to DRAFT) and style it with the format bar: six font families, a size control from 8 to 120 pt, bold, italic, underline, and a color picker with preset swatches plus a custom hex field. For an image, upload a PNG, JPG, or WebP — a logo with a transparent background works best — and set its scale from 10% to 80%.
3. Position it. Click one of the nine cells on the position grid (top, middle, or bottom crossed with left, center, or right), or tick Mosaic to tile the watermark repeatedly across the whole page.
4. Dial in transparency and rotation. Pick one of four opacity levels — full strength, 75%, 50%, or 25% — and rotate the stamp diagonally at −45° or 45°, vertically at 90°, or leave it flat.
5. Scope and layer it. Set a page range (from page … to …) so only those pages are stamped — pages outside the range dim in the preview — and choose whether the watermark sits over the PDF content or below it, behind the text.
6. Add page numbers if you want them. Open the Page numbers section and switch them on. Choose a format (1, Page 1, or 1 / 10), a position (bottom center, bottom right, or bottom left), and a starting number for documents that continue from an earlier section.
7. Download. Click Add watermark. The stamped file downloads as yourfile-watermarked.pdf, built entirely in your browser.

Why watermark a PDF at all

A watermark is metadata a human can’t miss. It travels with the page itself — through printing, screenshotting, forwarding, and re-saving — which is exactly why it remains the standard way to signal a document’s status and ownership.

The most common jobs fall into three groups. Status marking covers stamps like DRAFT, FOR REVIEW, SAMPLE, or VOID: they stop a work-in-progress from being mistaken for a final deliverable, which matters in any workflow where an old version quietly circulating can cause real damage — contracts, price lists, technical drawings. Confidentiality marking labels a document CONFIDENTIAL or INTERNAL USE ONLY on every page; many information-security policies require the classification on each page precisely because pages get separated from cover sheets. Attribution and copyright stamps — a studio logo, a photographer’s name, a © line — assert authorship on portfolios, proofs, and client previews, letting a client evaluate concept work while keeping the file useless as a final asset until sign-off.

Under the Berne Convention, copyright exists automatically the moment a work is fixed — a watermark doesn’t create the right. What it does is make ownership visible, deter casual misuse, and remove the “I didn’t know” defense.

Watermark design: readable stamp, readable document

A watermark has to survive a contradiction: prominent enough to register, quiet enough that the document underneath stays usable. Three settings do most of the work.

Opacity is the main lever. A full-strength stamp over body text makes both illegible. For a watermark placed over content, 25–50% opacity is the workable band: the mark reads clearly at a glance, and the text behind it can still be read through it. Reserve 75–100% for stamps that sit in empty margins or corners, where nothing competes with them. Lighter is also safer for printing — a dense black diagonal that looks fine on screen can dominate a printed page and swallow toner.

Rotation at −45° is the convention for a reason. A diagonal crosses every line of horizontal text once instead of sitting on top of any single line, so it stays visible without destroying a specific paragraph, and it spans the page too widely to crop away. A horizontal watermark suits headers, footers, and corner placements; the 90° vertical option works for spine-edge labels on documents that will be bound or filed.

Placement decides deterrence versus politeness. A centered diagonal is the strongest protective position — it overlaps the content a copier would want. Corner and edge positions from the nine-point grid are better for status labels that must not obstruct reading, such as Page proof or a small logo. The Mosaic option tiles the mark across the entire page and is the strongest deterrent of all: cropping or cloning out a dozen overlapping stamps is far more work than removing one.

The layer choice matters more than it looks. Placing the watermark below the content keeps every character crisp, because the page’s own ink is drawn on top of the stamp — the classic look of preprinted stationery. The trade-off: scanned PDFs and pages with opaque backgrounds or full-bleed images can hide an under-layer watermark entirely, so for scans, always stamp over the content at reduced opacity. Color follows the same logic — light gray or a desaturated red at low opacity reads as an official stamp; saturated colors at high opacity read as vandalism.

Common use cases and recommended settings

Use case	Watermark	Opacity	Rotation	Placement
Draft in review	Text: DRAFT, large size	25–50%	Diagonal (−45°)	Center, over content
Confidential report	Text: CONFIDENTIAL	25%	Diagonal (−45°)	Center or mosaic, over content
Design proof / unpaid concept	Text or logo image	50%	Diagonal (−45°)	Mosaic, over content
Branded letterhead look	Logo image, small scale	75–100%	None	Top corner, below content
Portfolio / photo preview	Logo or © name	50%	None or −45°	Bottom right or mosaic, over content
Voided / superseded document	Text: VOID	75%	Diagonal (−45°)	Center, over content

These are starting points, not rules — the live preview shows the real effect on your pages, so adjust until the mark is unmistakable and the document is still comfortable to read.

How the watermark lives in the PDF — and whether it can be removed

The PDF format offers several ways to attach a watermark. It can be a watermark annotation, an optional content group (a toggleable layer), or drawing operations written directly into the page’s content stream. The first two are separate objects that PDF editors can select and delete in one step, which is why they offer little real protection.

This tool takes the third route: the text or image is drawn straight into each page’s content stream, becoming part of the page itself — the same kind of object as the document’s own text and graphics. Stamped text is set in the PDF standard font families (Helvetica, Times Roman, and Courier, with their bold and oblique styles), which every PDF viewer ships with, so the stamp adds almost nothing to file size and stays sharp at any zoom because it is vector, not pixels. When you choose the below content layer, the page is rebuilt: the watermark is drawn first and the original page is embedded on top of it as a single flattened unit.

Honesty about removability: no watermark is un-removable. Because the stamp is ordinary page content, a determined user with editing software can strip it — easily if it is one light stamp over white space, laboriously if it is a mosaic overlapping body text. Treat a watermark as a deterrent and a provenance signal, not as security; anything that must not leak should be removed by proper redaction before sharing.

Page numbering conventions worth knowing

Page numbers look trivial until a document is printed, dropped, and reassembled. A few conventions from publishing and legal practice are worth borrowing.

Format follows purpose. A bare 1 is the quietest option and standard for reports and books. Page 1 is friendlier in informal documents and slide-style decks. 1 / 10 — the “page X of Y” pattern — is the convention for contracts, agreements, and filings because it makes a missing or substituted page immediately detectable: if the footer says 7 / 10 and you’re holding nine sheets, something is wrong. This tool defaults to that format.

Position follows reading. Bottom center is the safest default and the least likely to collide with existing headers or margin notes. Bottom right suits single-sided business documents, where the eye leaves each page at its lower right corner. Book typography alternates numbers to the outer edge of each spread — bottom left on left-hand pages, bottom right on right-hand — which is why both side positions are offered here.

The starting number is a real setting, not a nicety. Traditional book design numbers front matter in lowercase roman numerals and restarts the body at arabic 1; more practically, if you’re numbering a chapter that follows a 24-page section, set Start at to 25 so the sequence continues seamlessly. The numbers are stamped at a restrained 11 pt in black — footer-sized, per convention — and the count updates live in the preview as you change the format or starting value.

Bates numbering and legal document stamps

Lawyers who search for PDF stamping usually mean something more specific than a page number: Bates numbering, the litigation convention for labeling every page of a document production with a unique, sequential identifier. A standard Bates stamp is a prefix identifying the producing party or case, followed by a zero-padded number — ABC-000001, SMITH-000452 — placed in the footer, most often bottom right or bottom center. The rules behind it are strict where page numbers are loose: numbers must be unique across the entire production, run in one unbroken sequence across documents rather than restarting at 1 for each file, and never change once applied, because briefs and depositions will cite pages by that number. In US federal practice this grew out of FRCP Rule 34’s requirement that produced documents be organized and labeled.

This tool has no dedicated Bates mode, but you can approximate the convention for internal review sets and exhibit prep. Use the page-number feature in the bare 1 format at bottom right, and set Start at to continue the running sequence — if the previous document ended at page 452, start the next at 453 so the set numbers as one continuous production. Add the party or matter prefix as a small text watermark in a bottom corner of the nine-cell grid, at full opacity so it prints crisply. The honest caveat: this yields a prefix plus a plain number, not a fused zero-padded identifier, so for a formal court production use dedicated Bates software (Acrobat Pro and litigation-support tools do this natively) — and keep this tool for the drafts, exhibits, and internal binders around it.

What a watermark does — and doesn’t — protect

“Watermark” and “protect” appear together in searches constantly, so it is worth separating what each PDF security layer actually does. A watermark is a visible claim: it labels status and ownership, deters casual reuse, and survives printing and screenshots. It does not control access or actions. PDF offers separate mechanisms for those, and they are not interchangeable.

Threat	Right mechanism	What a watermark contributes
Wrong person opens the file	Open password (encryption)	Nothing — anyone with the file sees everything
Recipient prints, copies, or edits	Permissions password	Nothing technical, though the mark travels with any copy
Sensitive text must never be seen	True redaction (content removed)	Nothing — text under a watermark remains selectable and searchable
Document misrepresented as final or yours	Watermark	Its actual job: visible status and attribution on every page

Two traps deserve emphasis. Permissions passwords are advisory — many tools strip them — so never treat “printing disabled” as real security. And a black box drawn over text is not redaction: the text is still in the file and can be copied out. Match the lock to the threat, and let the watermark do the one job only it can do: making the claim visible.

Frequently asked questions

Is this free and private?

Yes on both counts. The tool is completely free, with no sign-up, no file-size gatekeeping, and no branding added to your document. It is also private by architecture, not by policy: the PDF is opened, previewed, stamped, and rebuilt entirely in your browser using client-side libraries, so the file never leaves your device and there is no server copy to worry about. That makes it appropriate for contracts, financials, and other documents you would not upload to a converter site.

Can I add a watermark and page numbers at once?

Yes — that is the intended workflow. Configure the watermark, switch on page numbers with your chosen format, position, and starting value, and click Add watermark once; both are applied in a single pass and one download. Each also works alone: leave the text field empty (or upload no image) to add only page numbers, or leave numbering off to stamp only the watermark. Note that the page range applies to the watermark, while page numbers run across every page.

Can I use my logo as the watermark?

Yes. Switch to Place image and upload a PNG, JPG, or WebP. A PNG with a transparent background is strongly recommended — a JPG always carries an opaque rectangle around the logo, which looks like a sticker rather than a stamp. Use the scale slider (10–80%) to size it, then apply the same transparency, rotation, position, mosaic, layer, and page-range controls as text.

Can a PDF watermark be removed?

With enough effort, yes — any watermark can be. This tool draws the stamp into the page content itself rather than as a deletable annotation, so it can’t be removed with one click in a viewer, and the below content mode flattens it under the original page. But dedicated editing software can still strip page content. Make removal expensive: use mosaic tiling, meaningful opacity, and placement that overlaps the actual content — and treat watermarks as deterrence and attribution, never as a substitute for redaction.

Will it work on scanned PDFs?

Yes. A scanned PDF is just a PDF whose pages are images, and the stamp is drawn onto those pages like any other. One caveat: choose the over PDF content layer for scans. A scan covers the whole page with an opaque image, so a watermark placed below the content would be hidden behind it. Stamped over the scan at 25–50% opacity, it behaves exactly as it does on a native PDF.

Should I add the watermark in Word or Google Docs before exporting to PDF instead?

Both editors can do it — Word under Design > Watermark, Google Docs under Insert > Watermark — and the mark carries into the exported PDF. Stamping the finished PDF wins when you don’t have the source file, when the document is a scan, or when you’re combining files from several apps and want one consistent mark. It also keeps the editable original clean: a watermark baked into the .docx is trivial for anyone with the file to delete before re-exporting.

Will the watermark show up when the PDF is printed?

Yes. The stamp is drawn into the page content itself, so it prints exactly like the document’s own text and graphics — there is no “screen only” mode. Do a single test print before a long run: a 25% opacity mark that looks subtle on a backlit screen can come out fainter on paper, while a dense dark diagonal can print heavier than expected and eat toner. Adjust opacity and reprint the one page until the balance is right.

Does a DRAFT watermark make a document legally non-binding?

No — the watermark itself has no automatic legal effect. Courts and counterparties look at the substance: whether the document was signed, agreed to, and acted upon. What a DRAFT stamp does is evidentiary and practical — it signals lack of finality, makes it harder to claim a working version was the agreed one, and prevents honest mix-ups. Pair it with version discipline: remove the stamp only from the genuinely final, approved copy.

Can I put different watermarks on different pages of the same PDF?

Yes, in passes. Set a page range and stamp the first mark — say CONFIDENTIAL on pages 1–3 — then load the downloaded result back into the tool and apply a second mark to a different range, such as APPENDIX on pages 4–10. Because each pass draws into the page content without re-encoding anything else, you can chain as many passes as you need with no quality loss.

Related design tools

• PDF Merge & Split — combine PDFs or extract pages before stamping.
• Organize PDF — reorder, rotate, and delete pages so the numbering comes out right.
• PDF Signature — draw or upload a signature and place it on the page.
• Images to PDF — turn photos and scans into a PDF you can watermark and number.