Per-viewer watermarking
A watermark that names the reader
Turn on watermarking and every page a viewer sees is tiled with their identity and a timestamp - and any copy they download is permanently stamped. A leaked page points straight back to its source.
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Free to start · per-viewer watermarking is a Pro feature · protection settings come on the next step
Tiled with the viewer's identity
The overlay repeats diagonally across every page: the viewer's email address - from the email gate or lead form - or their reader ID, plus the date and time. Awkward to crop, obvious in any photo of the screen.
Downloads stamped for good
This is not a CSS overlay trick. If you allow downloading, the copy is watermarked by real PDF stamping - written into the file itself, so it survives re-saving, printing, and forwarding.
Per viewer, not per document
Everyone sees the same document, but each copy carries its own name. Ten recipients means ten distinguishable copies - which is exactly what makes forwarding one of them a bad idea.
Honest deterrence
A watermark cannot make a leak impossible - nothing can. What it does is make every leak attributable, and documents that name their reader have a way of not leaking in the first place.
How per-viewer watermarking deters leaks
Documents leak when copies are anonymous. A PDF that looks the same on every screen costs nothing to forward - nobody can tell whose copy went astray. Per-viewer watermarking removes that anonymity: every page is tiled with the identity of the person viewing it and the moment they viewed it, so passing a copy along means passing along your own name.
The identity comes from how the reader arrived. Behind the email gate or a lead capture form, the watermark carries their verified email address; otherwise it carries their stable pseudonymous reader ID, so even an anonymous session produces a traceable copy. Either way the timestamp pins down exactly which visit a stray page came from - and your readership report tells you who was on the page at that moment.
What gets stamped, and when
- Pages on screen. A tiled overlay with the viewer's identity and viewing time renders across every page, in every viewer mode - standard, flipbook, swipe, and magazine. The reader cannot switch it off.
- Downloaded copies. If downloading is allowed, the file the viewer receives is stamped by real PDF stamping: the watermark becomes part of the page content itself, not a removable layer, and it travels with every subsequent copy.
- Printed pages. Because downloads are stamped into the file, anything printed from a stamped copy carries the watermark too.
Pairs with the rest of the protection toolkit
Watermarking covers the gap the other protections cannot: what happens after the pixels reach the screen. Right-click, print, and copy blocking stop casual saving; screenshot deterrence blurs the pages the moment the viewer window loses focus; watermarking makes whatever still gets captured attributable. Together they cover the document before, during, and after the read - the full toolkit is on the secure PDF sharing page.
The honest small print, as always: a screen that displays a page can be photographed, and no vendor can change that. The difference with a watermarked page is that the photograph names its photographer.
Where watermarking earns its keep
- Proposals & price lists - pricing that should not end up in front of a competitor - and identifies its route if it does.
- Manuscripts & pre-release content - drafts, embargoed reports, and launch material shared before the world is meant to see them.
- Investor & board material - decks and papers for a small, named audience, where each copy should answer for itself.
PDF watermarking questions.
How do I watermark a PDF for each viewer?
Upload the PDF to FileDroppr and turn on per-viewer watermarking in the document settings - a Pro feature. From then on, every viewer sees the pages tiled with their own identity and a timestamp, and any copy they download is permanently stamped with the same mark. You never prepare separate copies; one link serves everyone.
What identity does the watermark show?
The viewer's verified email address when the document sits behind the email gate or a lead capture form, or their stable pseudonymous reader ID otherwise - plus the date and time of the visit. Either way a stray copy can be matched to a specific reading session in your report.
Can the watermark be removed?
The on-screen overlay is rendered by the viewer and cannot be disabled by the reader. Downloaded copies are stamped by real PDF stamping - the watermark is written into the page content, not layered on top, so it survives re-saving and printing. No watermark on earth is literally irremovable to a determined expert, but removing this one is real work, and the leak it came from is already attributable.
Does watermarking stop screenshots?
No - and no tool can. What it does is make screenshots self-incriminating, since the capture includes the viewer's identity and timestamp. For capture itself, pair it with screenshot deterrence (also Pro), which blurs the pages whenever the viewer window loses focus.
Does watermarking change the document I uploaded?
Never. Your original file is stored encrypted and untouched; the overlay is rendered at viewing time and download stamping is applied to the copy being served. Turn watermarking off and the document serves clean again.
Which plan includes per-viewer watermarking?
Pro ($29/month, or $24/month billed annually) - alongside the email gate, screenshot deterrence, lead capture forms, and reader identities that make the watermark name a real person.
Put a name on every copy.
Upload a PDF, switch on per-viewer watermarking, and share a link where every page - on screen or downloaded - answers for where it came from.
See Pro pricingRelated: secure PDF sharing · self-destructing links · PDF read tracking