Free Virtual Data Room
A virtual data room is a single, controlled place to share a set of documents with people outside your company and to see how they engage with them. Founders use one to run a fundraise, deal teams use one for due diligence and M&A, and boards use one to distribute board packs. The point is to keep everything behind one link you control, instead of emailing attachments you can never track or take back.
PDFMarkr gives you that for free. Upload your PDFs and you get one tracked link that opens a clean viewer. You decide who can get in — require an email, set a passcode, ask for an NDA first, or set an expiry date — and you can turn downloading on or off. There is no per-seat pricing and no credit card. You sign in with a magic email link, or create a room anonymously and claim it later.
Once your room is live, you can see who opened it, how long they spent, and which pages actually held their attention, page by page. You can watch who is viewing right now, see who reached the end, and know whether someone opened it on a phone or a laptop. That turns a stack of documents into something you can genuinely read the room on.
Share multiple documents behind one link
A data room in PDFMarkr is simply more than one PDF bundled behind a single tracked link. Instead of sending a pitch deck, a financial model, and a cap table as three separate attachments, you add them all to one room and share one URL. Everyone works from the same, current set of documents.
Because the whole room sits behind one link, your access rules and your analytics apply across all of it. You set who can get into the room once, and you see engagement for every document inside it, rather than juggling separate files across separate email threads.
Control who gets in, per link
Each link carries its own access rules. You can require viewers to enter their email before opening, so you know exactly who is looking. You can set a passcode for a second layer, require the viewer to agree to an NDA before the documents load, and set an expiry date so the link stops working after your raise or deal closes.
You also decide whether downloading is allowed. Leave it on when you want people to keep a copy, or turn it off to keep the documents view-only inside the tracked viewer. Every one of these controls lives on the link itself, so different rooms can have different rules.
See page-by-page engagement across the room
This is what a plain file share cannot tell you. For each viewer, PDFMarkr records how long they spent and which pages held their attention, so you can see the slide someone lingered on and the section they skipped. Time is only counted while the document is actually in front of them, not while the tab sits ignored in the background.
You get a live view of who is reading right now, a record of who reached the last page, and the device each person used. If you captured an email, all of that is tied to a name. During a fundraise or a due-diligence process, that tells you which investors are genuinely engaged and which documents are raising questions.
A private, zero-knowledge option
For your most sensitive rooms, you can turn on private mode. Your files are encrypted in your browser with AES-GCM before anything is uploaded, and the decryption key travels only in the link's fragment — the part of a URL that is never sent to a server. We store ciphertext and nothing else, so even we cannot open your documents.
The trade-off is straightforward and worth understanding. Anyone who has the full link can open the room, because the key is in the link. That makes private mode genuinely zero-knowledge on our side, while putting the responsibility for who receives the link on you.
Frequently Asked Questions
Yes. You can create a room, share multiple PDFs behind one link, set access controls, and see full engagement analytics without paying and without a credit card. It is a genuinely free virtual data room, not a limited trial that expires. PDFMarkr Share is newer and lighter than enterprise platforms, and we would rather be upfront about that than hide the core features behind a paywall.
PDFMarkr Share covers the core of what a data room is for: one tracked link, per-viewer access control, and page-level engagement, for free and with a zero-knowledge privacy option. Enterprise suites are built for large, complex deals and include things we do not try to match, such as CRM and Salesforce integrations, built-in e-signature workflows, and deep admin and permissioning. If your process depends on those, a heavier platform will fit better.
Yes. On any link you can require an email, set a passcode, require an NDA before the documents load, and set an expiry date. You can also allow or block downloading. These rules live on the link, so each room can be as open or as locked down as the situation needs.
In private mode, your files are encrypted in your browser with AES-GCM before upload, and the decryption key is placed in the link fragment, which browsers never send to a server. We only ever store the encrypted version, so we cannot read your documents. The trade-off is that anyone with the complete link can open the room, so you control access by controlling who receives the link.
No. Viewers just open the link and, depending on your settings, may need to enter an email, a passcode, or agree to an NDA first — but they never create an account. To manage your own rooms and see the analytics, you sign in with a magic email link, or start a room anonymously and claim it later.