How to Send a PDF to a Large Group and See Who Actually Read It

By Oleh Tsyupa, Founder of PDFTrackr · Published 2026-09-03 · Updated 2026-09-03

13 min read

Half of all recorded reading sessions end within 43.2 seconds.

That is the median across 3,265 sessions on our own corpus, and it is the number to hold in mind before you send anything to a large list. The ninetieth percentile session ran 6.13 minutes, so the useful reading is in the tail rather than the middle — which is exactly why a headline open count from a group send is close to meaningless on its own, and why the interesting question is which of the recipients sits in that tail. The median page held attention for 3.02 seconds across 24552 distinct page views. These are all document types in our corpus, not group sends specifically; we do not cut this data by how a link was distributed.

Based on 3,265 validated sessions from 1,564 first-time visits across 270 documents (PDFTrackr production analytics, 22 Sep 2025 – 25 Aug 2026, last day partial, extracted 26 Aug 2026). Figures are medians, not averages.

If you have a list to send to this week, create a free tracked link and send yourself the first one before you send the other ninety-nine — or open the live demo on sample data first. The rest of this page is the method comparison.

The tools and the methods, ranked

Two different questions decide this, so there are two tables. The first is which tool, and it is ranked on the free-plan ceiling that actually binds on a group send. The second is which method, ranked on one axis only: after the send, what can you truthfully say about which individual recipient read what? Everything else — how pretty the viewer is, whether it does flipbooks — is a different page's question.

The five tools, ranked on what a group send gets out of each one's free plan. Twelve of the sixteen competitor cells carry a value through content/vendor-facts, never retyped, read from each vendor's own published pages on 12-14 Aug 2026 — three of those twelve set that value inside a sentence of ours. The last column, on where each tool beats PDFTrackr, is our own judgement rather than any vendor's wording. PDFTrackr cells are from shared/types/plans.ts and the live product.
ToolWhat the free plan gives a group sendWhat it can nameCheapest paid tier we hold a price forWhere it beats PDFTrackr
PDFTrackr50 files, 50 active share links, page-by-page reading, an email gate, 12 months of history, and automated opens excluded from the countsEach recipient, on a link of their own — or whoever types an address at the gate$9/mo · $84/yr, one flat account
HummingDeck5 documents, 5 links — no per-page analyticsPer-page analytics start at Starter (paid), not Free$10/mo billed monthly, 1 user (or $8/mo billed annually, $96/yr)Its Starter feature list adds deal rooms and interactive HTML bundles; PDFTrackr sells no room at any tier
Linkyhost1 upload (10 MB), link-level analyticslink-level only (views/visitors/sources) — not per-page reading$12/mo billed monthly ($5/mo billed annually, $60/year)Cheaper to start paying for on annual billing than our $84/yr, dearer than our $9/mo on monthly — and only on the smaller question of whether the link is working
Tiiny Hostfree plan hosts links indefinitely (log in once every 3 months); 1 active project, 3 MB uploads (0.5 MB PDFs), 5,000 visits/mo, 5 GB bandwidth/mo, no analyticspaid upgrade, from the cheapest paid tier (Tiny) — "Built-in analytics"; "Link Tracking" only from Solo up; visit-level, not per-page€9/mo billed monthly (€5/mo billed yearly, €60/year)Its free plan keeps a link online indefinitely and takes any file type; PDFTrackr takes PDFs only
Flipsnackwatermarked flipbooks, no analyticsPage-level statistics start at Professional ($38/mo billed annually, $52 monthly) — not Starter, the cheapest paid tierProfessional — $52/mo billed monthly ($38/mo billed annually, $456/yr)A flipbook reading experience for a catalogue, which PDFTrackr does not build at any tier
Ranked on identification, not on features. This table names no vendor and holds no competitor cell; every description in it is our own characterisation. PDFTrackr cells are from shared/types/plans.ts and the live product.
MethodWhat it namesWhat it cannot doCost of entry
1. A tracked link per personEach recipient by name, because the link itself is the identityNeeds one link generated per person, so a very long list is real work by handFree on PDFTrackr up to 50 active links; bulk generation is a Pro feature
2. One tracked link plus an email gateOnly the people who choose to type an address, which they may mistypeNames nobody who declines the gate, and on the free plan a typed address is not a checked one; a Pro link can require a one-time codeFree on PDFTrackr, any group size
3. Your email platform's click trackingWhich subscriber clicked, from a list you already ownNothing about the document — a click is not a page, and an open is not a readIncluded in most email platforms
4. A file host, or a plain attachmentNothing per person; a host gives a visit count, an attachment gives silenceCannot separate one reader from another at allFree, and worth exactly that on this axis
Automated opens excluded from the countsPDFTrackr classifies and excludes them at session close, freeIt cannot retro-fit identity onto a shared link that never carried oneIncluded at no cost, with the filter's removals shown

This is the part that surprises people, so it is worth being precise about. A share link is a URL. When two hundred people receive the same URL, every request that arrives looks the same to whatever is on the other end: a page was rendered, for this long, from roughly this country, on roughly this kind of device. Nothing in that request says which of the two hundred sent it. The tool is not being coy; the information was never transmitted.

That leaves exactly two honest ways to attach a name, and both of them change what you send rather than what you measure. Either the link is unique to the person, so that the URL itself is the identity — which means generating and sending a different URL to each recipient. Or the document sits behind a gate that asks the reader who they are, which names the people who answer and nobody else.

A group send makes a second problem worse in a way a one-to-one send does not. Send to two hundred corporate inboxes and a proportion of those inboxes will fetch your link before a human ever sees it — mail-security systems follow links in messages to check them, and chat and social services fetch them to build a preview card. On a single send that is one spurious open you might notice. On a group send it is a bulk arrival of opens in the first minutes, which is how a distribution list produces an eighty-percent open rate that means nothing. PDFTrackr classifies those at session close and keeps them out of the counts; the size of the effect on our own corpus is measured on our page on whether PDF view counts are real.

Method 1 — a tracked link per person

This is the method that answers the question in the title without asking your readers for anything, and it is first for that reason. Instead of one URL in a broadcast, each recipient gets a URL that belongs to them. When a session shows up on the link you sent to a particular person, that session is that person — no gate, no typing, no guessing.

What you get back is per person rather than in aggregate: whether they opened it, which pages rendered, how long each held them, whether they came back, and whether they took a copy away. For a document sent to a board, a client list or a cohort, that turns a circulation number into a follow-up list — the four people who read to the end are a different conversation from the sixty who never opened it.

The honest cost is the work. One link per person means one link generated per person, and past a certain list size that stops being something you do by hand between meetings. PDFTrackr's free plan allows fifty active share links, which covers a board, a class or a client list and does not cover a newsletter; Pro lifts the link ceiling and generates the links in one pass rather than one at a time. Whichever tool you use, the arithmetic is the same: this method trades setup effort for the only clean answer on this page.

Two limits to say out loud. A link is a person only for as long as that person keeps it to themselves — forward the URL and the second reader arrives wearing the first one's name, which is a reason to treat per-person links as strong evidence rather than proof. And nothing survives a download: once the file is on a disk, further reading reaches nobody. Both of those are true of every tool in this category.

Method 2 — one link plus an email gate

If the list is too long for one link each, or you genuinely do not know who will end up receiving the document, put a single link behind an email gate. The reader is asked for an address before the document renders, and the reading that follows is attached to whatever they typed. This is the standard approach for a lead magnet, a public report or anything circulated onward past the people you originally emailed.

It scales to any group size, which is its whole advantage, and PDFTrackr carries it on the free plan. What it costs you is completeness and certainty. Some proportion of readers will close the tab rather than fill in a form, and they read the document as far as you are concerned invisibly, so a gated link systematically under-counts the interested. And an address a reader simply types is not a checked one on a free link — a Pro link can require a one-time code sent to that address, after which the sender is shown per visit that it was confirmed.

The practical shape for a large group is often both methods at once: per-person links for the twenty people whose individual reaction matters, and one gated link for the wider circulation. Our page on viewer identification through an email gate works through the gate mechanics and what a gate costs you in completeness.

Method 3 — your email platform's click tracking

Every mailing platform will tell you which subscriber clicked which link, and that is a real answer to a real question — it names people, it needs no new tooling, and you have it already. For “who is engaging with my mailing at all” it is the correct instrument and this page is not arguing against it.

It stops at the door. A click means the browser was opened; it says nothing about whether page one rendered, let alone page fourteen. Nor is an email open a read: image-based open tracking is defeated by image proxying and by mail clients that pre-fetch, which is why open rates across the industry drifted upwards without anybody reading more. The two measurements answer different questions and the mistake is treating the first as evidence for the second.

The combination is better than either. Keep the platform exactly as it is, and make the link in the message a tracked link so that the click hands over to a measurement of the document itself. That is the whole method, and our page on tracking PDF opens in an email campaign works through it step by step for a scheduled send.

Method 4 — a file host, or a plain attachment

Uploading the PDF somewhere and pasting the URL is what most group sends actually do, and for distribution it is fine: the file is reachable, it is not clogging anybody's inbox, and you can replace it later. On this page's axis it is fourth because a general-purpose host counts visits to a URL, not readers of a document, and it cannot separate one visitor from another.

The plain attachment is last and it is not close. A PDF attached to an email is a copy handed over: it does not report back when it is opened, and it does not report back when it is forwarded to eleven other people. That is not a gap in anybody's product, it is what a file is. Whatever you do about measurement, the first move for a large group is to stop attaching the file — for the mailbox-size reason as much as the tracking one, which our page on sending a large PDF to a client covers separately.

The tools, on this page's one axis

Five tools, ranked on what each one lets you say about an individual recipient when the same document went to a lot of them. Free-plan ceilings matter more here than anywhere else on this site, because a group send is precisely where a five-link or single-upload allowance stops being theoretical. Every competitor figure is that vendor's own published wording here, with a fetch date. If you want the same field ranked on tracking generally rather than on group sends, the best free PDF tracking tools is the wider comparison this page hangs off.

PDFTrackr

Upload the PDF, create a link per person or one link behind an email gate, and read back what each session did page by page. On the free plan that is 50 files inside 500MB at up to 50MB each, behind up to 50 active share links, with 12 months of history and no card — and page-by-page reading, the email gate, a password, an expiry date and a download switch are all on it rather than above a paid tier. Automated opens are classified when the session closes and excluded from the counts, and the dashboard shows what the filter removed, which is the difference between an open rate and a readership on a list send. The two things free does not carry are the real-time alert — opens arrive in the next morning's digest — and any file type other than PDF. Fifty active links is the ceiling that decides whether this method fits your list.

Best for: a list of up to fifty named people where you want to know which of them actually read the thing.

Honest weakness: PDF only; fifty active links on free, and generating a link per person one at a time past that point.

HummingDeck

HummingDeck is the closest competitor on this page's axis and it is worth reading its free plan carefully before choosing it for a group. Its pricing page describes the free tier as 5 documents, 5 links — no per-page analytics, and per-page analytics arrive at Starter (paid), not Free — the Starter tier at $10/mo billed monthly, 1 user (or $8/mo billed annually, $96/yr), whose own feature list adds link expiration, download controls and geographic insights. The line to weigh for a group send is retention: its plan-comparison grid gives the free tier Real-time only — no history kept. Five links is five recipients if you take the per-person route, so on the free tier this is a tool for a handful of people rather than a list.

Best for: a small, high-value set of recipients where you are willing to pay from the first tier up.

Honest weakness: five documents and five links on free, no per-page analytics until Starter, and the free tier keeps no history.

Linkyhost

Linkyhost answers the smaller question cheaply and says so plainly. Its free tier is 1 upload (10 MB), link-level analytics, and the analytics are link-level only (views/visitors/sources) — not per-page reading — it tells you the link is working, not that the document is landing. For a group send that means totals: how many visits, from where, through which source, with no way to attribute a visit to one recipient rather than another. Its first paid tier is $12/mo billed monthly ($5/mo billed annually, $60/year), which lifts the single-upload cap and adds password protection.

Best for: one document, one URL, and a visit count that confirms distribution worked.

Honest weakness: link-level only, so it cannot separate one reader from another; the free tier stops at a single upload.

Tiiny Host

Tiiny Host is a publishing tool, and for putting a file at a URL and keeping it there it is genuinely good: free plan hosts links indefinitely (log in once every 3 months); 1 active project, 3 MB uploads (0.5 MB PDFs), 5,000 visits/mo, 5 GB bandwidth/mo, no analytics. Two of those numbers decide whether it suits a large group. The free tier caps PDF uploads at half a megabyte, which most real documents exceed, and analytics are a paid upgrade, from the cheapest paid tier (Tiny) — "Built-in analytics"; "Link Tracking" only from Solo up; visit-level, not per-page. The first paid tier is €9/mo billed monthly (€5/mo billed yearly, €60/year). So the free plan hosts the file but reports nothing, and the paid plan reports visits rather than pages or people.

Best for: publishing a document at a permanent URL where the link mattering more than the reading is the point.

Honest weakness: no analytics on the free tier, a half-megabyte PDF ceiling on it, and visit-level analytics when paid.

Flipsnack

Flipsnack turns the PDF into a flipbook, which is a presentation decision rather than a measurement one, and for a catalogue or a magazine going out to a mailing list it is a reasonable thing to want. On this page's axis it sits last of the five because the free plan is watermarked flipbooks, no analytics, and its own plan-comparison grid puts page-level statistics at Professional ($38/mo billed annually, $52 monthly) — not Starter, the cheapest paid tier rather than on the cheapest paid tier. Nothing in what it publishes attributes a reading session to a named recipient, so a group send returns audience-level numbers.

Best for: a catalogue or magazine where the reading experience is the point and the group is an audience rather than a list.

Honest weakness: free plan is watermarked with no analytics, and page-level statistics start two tiers up.

Where these tools beat us

Four of them beat PDFTrackr on something real, and if one of those things is your requirement then the ranking above is the wrong ranking for you.

HummingDeck's paid Starter tier bundles deal rooms and interactive HTML bundles; PDFTrackr sells no room at any price and takes PDFs only, so a bundle of documents with one set of numbers over the whole set is not something we do. Tiiny Host's free plan keeps a link online indefinitely on a much lighter product than ours, and if the job is publishing rather than measuring, paying attention to analytics is money spent on a question you do not have. Flipsnack produces a genuinely better reading experience for a catalogue than a PDF viewer does, and we do not attempt that at all. Linkyhost's paid tier is $12/mo billed monthly ($5/mo billed annually, $60/year), which is cheaper than our $84/yr on annual billing and dearer than our $9/mo on monthly — and what it counts is whether the link was visited rather than what was read.

There is also one axis where several tools in the category beat our free plan and it is worth naming: speed of notification. Our free opens arrive in the next morning's digest rather than the moment they happen. If knowing within the hour matters more than knowing in detail, weigh that before choosing.

When Pro becomes the right choice

Free is not a teaser: page-by-page reading, the email gate, the automated-open filter and twelve months of history are all on the plan that costs nothing, and for a group of up to fifty named people they are the whole method. Most people reading this page never need to spend anything with us.

Upgrade to Pro once the group stops fitting the method — once it is bigger than fifty active links, or once you are generating a personalised link per person by hand often enough that the afternoon costs more than the subscription. At that point bulk personalised links produce one tracked link per recipient in a single pass — which is what turns method one from a nice idea into something you would actually do for two hundred people. The other trigger is the return visit: on Pro you are told when the same reader comes back, which on a group send is the signal that separates the interested from the polite. See the reading side on the demo dashboard before deciding.

How we evaluated these — and who is missing

Each competitor figure above is that vendor's own published wording, read from its own pricing or plan-comparison page on 12, 13 or 14 Aug 2026, carried into this page through a fact file rather than retyped, and quoted with the billing period and currency the vendor stated. Where a vendor publishes a monthly and an annual rate, both are given, because a headline price with the annual toggle pre-selected is the most common way these comparisons mislead.

Frequently asked questions

Can you see who read a PDF if everyone got the same link?

Not by name, no. A shared URL carries no identity, so every session on it looks the same and the honest output is a total: how many sessions, which pages, how long. To attach a name you either give each recipient a URL of their own, or put the document behind a gate that asks the reader for an address. PDFTrackr does both, free, and neither is a workaround — they are the only two ways the information ever reaches the sender.

What is the largest group I can do this with for free?

On PDFTrackr's free plan, fifty active share links, so fifty named recipients if you take the link-per-person route. There is no group-size limit at all on the gated-link route: one link can go to any number of people and it names the ones who type an address. If you need more than fifty personalised links, that is the Pro ceiling lift and the bulk generation that goes with it.

Does an open rate from a big send mean anything?

Less than it looks, and a group send is the worst case. Sending to many corporate inboxes invites many mail-security scanners, which follow links before a human sees them, and link previewers fetch them to build cards. Those arrive as opens on most tools. PDFTrackr classifies them at session close and excludes them from the view counts, and shows what the filter removed rather than quietly shrinking the number. In our own unfiltered production data, roughly one recorded view in seven had zero page engagement.

Is an email platform's click tracking enough?

It is enough to know who is engaging with your mailing, and it is the right tool for that. It is not enough to know whether the document was read, because a click is the browser opening and nothing more — no page count, no reading time, no indication of whether the reader reached the part that mattered. The two work well together: keep the platform, and make the link it sends a tracked link so the click hands over to a measurement of the document.

What happens if a recipient forwards the link?

The second reader arrives on the first reader's link, and on a per-person setup they arrive wearing that person's name. That is the honest limit of treating a URL as an identity, and it is why per-person links are strong evidence rather than proof. If forwarding is the thing you are worried about rather than an inconvenience, a link that requires a one-time code to the recipient's own address is the Pro control that raises the bar, and no tool can stop somebody photographing a screen.

Can I stop people downloading it?

You can turn the download button off on any PDFTrackr link, free, and that stops the ordinary route out. It does not stop a screenshot, a photograph of the screen or a determined browser user, and any product that tells you otherwise is overselling. Treat it as friction that keeps an honest document honest, not as a lock — and remember that once a copy does leave, nothing about its later reading reaches anybody.

Sources

  1. HummingDeck — Pricing: the free tier's document and link allowance, the Starter tier's price in both billing periods and its per-page analytics line, and the plan-comparison grid's analytics-retention row (accessed 2026-08-13)
  2. Linkyhost — the free tier's single-upload allowance and its published analytics description (views, visitors, sources), plus the Pro price in both billing periods (accessed 2026-08-14)
  3. Tiiny Host — Pricing: the free plan's limits and link lifetime, the Tiny tier's price in both billing periods, and where built-in analytics and link tracking begin (accessed 2026-08-12)
  4. Flipsnack — Pricing and the plan-comparison grid: the free plan's watermark and the tier at which page-level statistics begin, read in a browser (accessed 2026-08-14)
  5. Microsoft Learn — Safe Links in Microsoft Defender for Office 365: URLs scanned before message delivery, the mechanism behind opens arriving in the first minutes of a group send (accessed 2026-08-12)
  6. PDFTrackr — the free plan's limits and the Pro price, published on the site's own pricing surface (accessed 2026-09-03)

Send the first one to yourself

Create a tracked link, read your own session back page by page, then send the other ninety-nine. Free: 50 files, 50 links, 12 months of history, no card.

Create a free tracked link

Keep reading: the best free PDF tracking tools, free file sharing with analytics, and how free PDF tracking works.

Oleh Tsyupa

Founder, PDFTrackr

Has analysed over 3,000 tracked document-viewing sessions on PDFTrackr.