Docshark
Dynamic watermark

The reader's name on every page.

Put the reader's name and the time on every page. Show it on screen, or add it to the PDF so it stays on prints.

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Send the deck

Series B deck.pdf

AAsim Ahmed

Recipients

  • AAdham Alaaadham.alaa@doc-shark.com
  • AAhmed Ibrahimahmed.ibrahim@doc-shark.com
  • AAsim Ahmedasim.ahmed@doc-shark.com

Watermark mode

  1. Asim is about to send the deck
  2. He picks Burned in
  3. Adham opens it, and it knows him
  4. His name and the time, four times over
  5. Ahmed opens the same page
  6. It carries his name instead

What the mark carries

Keep scrolling. Each card settles on the last, the way each mark settles on the page.

Per-viewer identity

The watermark shows the reader's own email, so a photo of the page points to a person.

Same page
Adham AlaaNot opened yet

7. Revenue and retention

adham.alaa@doc-shark.com
Ahmed IbrahimNot opened yet

7. Revenue and retention

ahmed.ibrahim@doc-shark.com
  1. One deck, ready to send
  2. Adham opens his link
  3. Ahmed opens his
  4. Same page, two different receipts

Live timestamp

The time updates every minute, so you can tell when a screenshot was taken.

On screen now11:3014 Sep 2026
The shared grab10:42Adham Alaa · adham.alaa@doc-shark.com · ID K4P9-2M7Q · 14 Sep 2026, 10:42 UTCTaken 49 minutes earlier
  1. The page is marked at 10:42
  2. A minute passes, and the mark moves
  3. Someone shares an older grab
  4. The time on it says how old it is

On screen or in the file

On screen, it sits over the page in the browser. In the file, it is added to the PDF, so it stays on prints and exports.

Overlay
Adham Alaa
In the viewer
Burned in
In the file
Printed copyAdham Alaasealed
  1. The sender picks a mode
  2. Overlay draws it in the viewer
  3. Burned writes it into the file
  4. The printed page still carries it

Works everywhere

Shared links, data room links and signature requests, with one switch.

doc-shark.com/s/7f3a9cShare linkMarkedAny file you send
Dataroom linkMarkedEvery file in the room
Signing requestMarkedThe signer's own copy
  1. One setting, three ways to send
  2. A share link carries the mark
  3. A dataroom link carries it too
  4. So does a signing request

A mark you can read off a photograph

Someone forwards a page they should not have. Here is what you get to do about it.

  • The whole pageOne corner

    Adham AlaaAdham AlaaAdham AlaaAdham Alaa

    His name is still on it

    Crop it. It is still there.

    The name sits in four places on every page, on a slant. A photo of one corner still has it.

  • Nobody signed inA name

    You still get

    • Viewer in Riyadh, SA
    • Chrome on Windows
    • ID 3XYZ-9876

    No name? Still a lead.

    If nobody signed in, the page says the city and the browser instead. Enough to know which visit it was.

  • One visit

    sess_9f2c41ab-K4P92M7Q

    On the page

    K4P92M7Q

    Short enough to read down the phone

    Eight characters, and you know.

    Every page carries a short code. Read it off the photo, type it in, and you have the visit it came from.

  • A very long address

    alexandra.konstantinopoulos-whitfield@procurement.northern-division.example.com

    What lands on the page

    alexandra.konstantinopoulos-whitfield@procu...

    Your reader still reads.

    The mark sizes itself to the page and long addresses get shortened, so it never sits on top of the words.

Turn it on once. Every page signs itself.

  1. Choose where it shows

    On screen to show it in the browser. In the file to keep it on prints and downloads.

  2. The viewer opens the link

    Their email and the time appear across every page.

  3. A leak shows whose copy it was

    A photo of the screen or a printed copy still carries the reader's name.

Start free
Try it

See your name on every page.

Type an email and switch between the two: on screen, or in the file.

Type an address to see it on the page.

Watermark mode

What they see

7. Revenue and retention

Written into the file, so a print carries it too.

Pick a mode

Before you send the file out.

Have a question we did not answer? Talk to us

What is the difference between on screen and in the file?

On screen, it shows in the browser over the document. In the file, it is added to the PDF, so it stays on prints, downloads and exports.

Can the viewer remove the watermark?

In the file, the name is part of the PDF, so it stays on prints, downloads and exports. Either way, a leaked page shows whose copy it was.

Whose identity appears in the watermark?

The reader's email. On links that ask for an email, it is that email. On signature requests, it is the signer's email.

More features.

Ready to send your next document?

Share it, see who read it, and get it signed.

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