The "I will email the deck" promise that almost nobody keeps
You have given the talk. The Q&A is winding down. Someone in the second row asks the question every speaker hears: "Can you share the slides?" You say yes, you will email them. The room nods. You move on.
That email goes out 48 hours later if it goes out at all. Most speakers we know hit something close to 25% follow-through on post-talk deck delivery — partly because the list got buried under inbox, partly because the deck needs one more polish, partly because life happened. The attendees who asked stopped caring within a week.
The contrarian frame: the deck is most valuable to your audience in the 90 seconds after you finish talking, not 48 hours later. A QR code on your final slide captures that moment. You point at it, say "this is the deck, scan now," and the room takes out phones. Speakers who run this pattern see 60-75% deck downloads from the room — three times the email-follow-up baseline.
This post is the speaker-to-speaker playbook for presentation QRs. The deck-handoff use case is the foundation, but it is not the most interesting one. Mid-talk audience-poll QRs change how the room engages with you in real time. Per-slide resource QRs route the specific attendee who cared about that specific point to the deeper reading. Academic-poster QRs handle the conference poster session where you are not there for half the day. The events and conferences pillar covers the broader conference setup; this guide covers what happens inside the actual talk.
The six highest-value presentation QR placements
Most slide decks need at most two QR codes. Some training decks and academic posters use four or five. Here is the full set worth thinking about.
1. Final-slide deck handoff. The single highest-value placement. A QR linking to the deck PDF, the recording, or a wrap-up page with both. The pattern that beats "I will email the deck."
2. Mid-talk audience-poll QR. A QR on the slide where you ask the audience a question, routing to Slido, Mentimeter, or Poll Everywhere. Replaces the "go to slido.com and type the code 123456" friction with a one-tap join.
3. Per-slide resource QR. On the specific slide where you cite a paper, recommend a tool, or reference a framework, a small QR links to the source. The attendee who cared about that point in particular gets the deep link without waiting for the resources slide at the end.
4. Academic-poster QR. On a conference poster, a QR to the full PDF of the paper plus a vCard QR for author contact. Standard practice at most major academic conferences now.
5. Training-deck workbook QR. In a training session, a QR on the activity slide routing to the worksheet, the exercise file, or the live collaboration doc. Replaces "open the folder I shared in the email this morning" with "scan now."
6. Sales-pitch follow-up QR. On the closing slide of a sales pitch, a QR to a customized landing page (proposal, pricing calculator, demo booking). The buyer with intent scans before they leave the meeting; the buyer without intent does not.
Notice what is not on this list: a QR on every slide. Decks with QRs on every slide train the room to ignore them. Use QRs at the three or four moments where the audience action you want is concrete and the destination is specific.
The deck-handoff math — promise vs. live handoff
The single most important number in this post: speakers who promise post-talk email delivery get roughly 25% follow-through on deck downloads. Speakers who put a deck-handoff QR on the final slide and call attention to it get 60-75% downloads from the room. That gap repeats across every speaker we have asked about it.
The mechanics behind the gap are not mysterious. The 90 seconds after the closing slide is the highest-attention window for the deck. Attendees still have the talk fresh, they have not yet been pulled into the next session or the lunch line, and they have their phone in their hand because most rooms have phones out during Q&A anyway. A QR captures that window. An email promise depends on the speaker remembering to send it, the list being clean, the deck being polish-ready, and the recipient not having moved on. Each of those four conditions has a 50-80% success rate, and they compound.
The label-design discipline matters. "Scan for the deck" beats "More info." "Take the slides with you" beats "Download." The call-to-action design guide covers the verb choice. Make the call-to-action concrete and tied to a specific action.
The placement discipline. Put the deck QR on the slide before your final "Thank you" slide, not buried at the bottom of the contact slide. Keep the QR on screen for the full Q&A. The questions are when the room remembers they wanted the deck.
For most speakers, the URL QR generator handles the deck handoff. Static is correct — the deck URL after the talk does not change. Dynamic is only needed if you plan to republish the deck after questions surface improvements, in which case see the static vs dynamic QR codes post for the decision logic.
The mid-talk audience poll — Slido, Mentimeter, Poll Everywhere
Mid-talk polling is the single fastest way to wake up a room. Mentimeter, Slido, and Poll Everywhere built whole companies on this — and all three platforms now support QR-based joining as a first-class feature, because the friction of "go to slido.com and type the code 123456" loses a third of the room.
The mechanics. Each polling platform generates a unique join code per session. The QR encodes the join URL with that code baked in. The attendee scans, lands directly on the poll, votes. No typing, no code entry, no "wait, what platform are we on." Slido documents the QR join pattern in their event setup guide. Mentimeter and Poll Everywhere have equivalent flows.
The participation gap. A 30-second QR-poll prompt in a typical 100-person room gets 40-60% participation. The same room asked to type slido.com/code-123456 gets 15-25%. Three times the engagement, with no change to the question or the room. The improvement holds across audience types — technical conferences, corporate trainings, university lectures.
The slide design. The poll QR goes large — at least 8-10% of slide width. The QR sits beside the question, not below it. The label is the actual poll question, not a generic vote prompt. Keep the QR on screen for the full poll window, not just the intro. Late scanners are common.
The placement frequency. Two to three poll moments in a 45-minute talk is the sweet spot. More than four trains the room that the polls are filler. Use polls where you genuinely want the audience signal — checkpoint questions, opinion splits before you reveal data, real-time feedback on the framework you just introduced.
The rooms where polling fails: very large rooms (over 500) where the projection size limits QR resolution; rooms with weak cellular and no attendee WiFi; rooms where the audience does not bring phones out (some executive briefings). Test the room before relying on the pattern.
The per-slide resource QR — on the slide where the topic actually came up
Most decks bury resources on a single "For further reading" slide at the end. That slide gets ignored. Attention is highest at the moment the topic was just discussed, not 40 minutes later when you flash 14 links at once.
The per-slide resource QR sits on the specific slide where you cite a paper, recommend a tool, or reference a framework. Small — 5-7% of slide width, top-right or bottom-right corner. Labeled with the specific resource: "The 2024 GS1 study," "Anthropic's tool-use guide," "The original Goodhart paper." The attendee who cared about that point in particular scans in real time; the rest of the audience ignores it. That is the right outcome.
The conversion gap. A specific per-slide resource QR labeled "The 2024 GS1 study" converts at 2-3x the rate of a generic "More resources" QR on a wrap-up slide. The specificity is doing the work. The attendee already wanted the citation; the QR makes it one tap instead of a Google search later.
The design discipline. Do not put a resource QR on every slide. Pick the three or four slides where you cite something concrete and where the attendee likely wants to follow up. Slides about "agile is good" do not need a QR. Slides citing a specific dataset, paper, or tool do.
If you cite multiple resources on one slide (a comparison, a literature review), use a multi-URL QR that lands on a small page with all the relevant links. Cleaner than four QRs on one slide.
For academic talks where every citation matters, an alternative pattern is a single "resources" QR per major section, routing to a per-section resource page. Section 1 resources, section 2 resources, section 3 resources. Three QRs across a 45-minute talk, each scoped to the segment of content the attendee actually engaged with.
Academic poster QRs — the conference poster session standard
Academic conferences have standardized on QR codes for poster sessions over the past five years. The pattern is now expected at most major venues — biology, physics, computer science, medicine, education. University poster-design guides (for example, the MIT Communication Lab academic poster guide) recommend QR codes for full-paper access and author contact as a standard element.
The two QRs every academic poster should carry:
The full-paper QR. A QR linking to the full PDF of the paper (preprint server, journal page, or institutional repository). Top-right or bottom-right corner of the poster, 1.5-2 inches square. Reviewers walking the poster session capture the paper in one tap without needing to search later.
The author-contact vCard QR. A QR encoding the author's name, institution, email, and (optionally) ORCID and lab website. Bottom-left or beside the author's name. The vCard format saves the contact directly to the reviewer's phone. See the vCard QR generator for the field discipline.
The size discipline. Posters are large (A0 or 36x48 inches is typical), so QRs need to scale. 1.5-2 inches square is the floor for a reviewer scanning from 3-5 feet away. Bigger is fine.
The error correction level. Use level Q for indoor poster sessions, level H if the conference is partly outdoors or in a high-traffic area where the poster might brush against passersby. The error correction levels guide covers the trade-offs.
The contrast discipline. Black-on-white is the safest choice. Some posters use the author's institutional brand color for the QR — that works only if the contrast against the poster background hits 4.5:1 WCAG contrast. Test the QR on the printed poster proof before the production print run, not just the design file.
The verification before printing. Print one full-size proof, walk it to a window for natural-light testing, scan from 5 feet on a phone with no special apps. Confirm the destination loads in under three seconds. Posters print expensive; reprinting because the QR did not scan is avoidable.
Platform-fit table — which presentation type needs which QR
Different presentation contexts have different QR needs. The table covers the common patterns.
| Presentation type | Highest-value QR placements | Watch-out |
|---|---|---|
| Keynote / conference talk | Final-slide deck handoff, 1-2 poll QRs mid-talk, sparing per-slide resource QRs | Test on the venue projector before doors open — contrast shifts under stage lighting |
| Sales pitch / pitch deck | Closing-slide follow-up QR to a tailored landing page or proposal | One QR per pitch — multiple QRs dilute the close |
| Training workshop | Per-activity workbook QR, mid-session poll QRs, closing-slide resource library QR | Reuse the same deck across cohorts — use static codes if the workbook URL is stable |
| Academic poster session | Full-paper PDF QR, author vCard QR, optional dataset/code-repo QR | Print one full-size proof and scan-test before the production run |
| Executive briefing | Closing-slide secure-resource QR (often gated) | Confirm SSO works on the destination — execs scan once, abandon on the second login screen |
| Webinar / virtual talk | On-screen poll QRs are useful only if the room has phones out — otherwise use the chat link | Most virtual audiences are on the same device; chat link beats QR |
| University lecture | Final-slide reading-list QR, mid-class poll QR, occasional per-slide paper-citation QR | Avoid asking students to scan every slide — train them on the pattern in week one |
Tips
- For any room over 500 seats, the back-of-room scan distance matters — the QR should be at least 10% of slide width on the main projection. The [size guide](/blog/qr-code-error-correction-levels) covers the size-vs-distance math.
- For hybrid talks with both in-person and remote attendees, put the QR on screen and also paste the URL in the chat — half the remote audience will not see the projected QR clearly.
- For decks reused across multiple events, use dynamic QRs that route through a shared per-deck redirect URL. Update the destination per event without re-exporting the slides.
Static vs dynamic for presentation QRs
Most presentation QRs should be static. The deck URL after the talk does not change. The Slido or Mentimeter poll URL is generated fresh per session anyway. The academic paper PDF lives at a stable URL after publication.
Static is correct for: final-slide deck handoff (URL stable after talk); per-slide resource QRs citing published papers and tools; academic-poster full-paper QRs (URL stable post-publication); academic-poster vCard QRs encoding the author's contact directly (no vendor dependency).
Dynamic is correct for: training decks reused across cohorts where the workbook URL might rotate; sales-pitch follow-up QRs routing to a per-prospect landing page that updates per-meeting; conference decks republished post-talk with a Q&A appendix; any deck where the destination genuinely shifts after the original talk.
The practical implication for most one-off speakers. You do not need a dynamic QR vendor. The free static URL QR generator covers the deck-handoff use case, the vCard QR generator covers the academic-poster author-contact use case. Both work fully offline and never expire.
For training designers and frequent-talk speakers, dynamic QRs start to matter. A training program with 12 modules reused across 30 cohorts a year is roughly 360 deck handoffs. If any workbook URL ever changes, every printed handout breaks. Dynamic codes paid through Lite at $5/mo prevent the silent breakage.
When the cancellation policy actually matters (and when it does not)
We bang on about cancellation policy across most of our content because for restaurants and offices, printed signage lives for years and a dead QR kills the link. Presentations are mostly different. A keynote QR matters for two weeks — the day of the talk and the post-talk follow-up window. Then attention moves on. If the QR dies a year later, very few people are still scanning your old conference slide.
That is the honest framing for most speakers. The cancellation policy is not a top-three concern for a one-off keynote.
The exception. Training programs reused for years are exactly where it matters. A safety-training deck a manufacturer runs every quarter for ten years carries QRs on workbook slides, on safety-procedure slides, on the closing competency check. If the QR vendor deactivates the codes when finance pauses the subscription between training cycles, the decks silently break and the training team finds out from a confused trainee in week one of the next cohort.
The permanent QR code guide covers the vendor-by-vendor policy. Short version: EZQR and QR Tiger keep codes alive after cancellation; Flowcode and QR Code Generator deactivate per current terms. For long-lived training programs, the choice matters. For a one-off keynote, it does not.
The broader filter for picking a QR vendor for presentations is in the best QR code generators of 2026 shortlist. Most speakers do not need anything beyond the free static generator.
Where EZQR fits for speakers and training designers
Most speakers do not need a paid QR plan. The free EZQR static URL QR covers the deck-handoff QR on the final slide, the per-slide resource QRs citing published papers, the academic-poster full-paper QRs, and the closing-slide follow-up QR for sales pitches. No watermark, no expiration, no signup required for static codes.
Where the Lite tier at $5/mo starts to matter:
Training designers running multi-deck programs. Twelve training modules, each with three workbook QRs, reused across thirty cohorts a year, plus per-cohort tracking on which workbook resources actually get scanned. Static does not cover the analytics and the update-without-reprint workflow.
Frequent-speaker decks. Speakers who give the same talk at multiple events benefit from a dynamic deck QR routing to a per-event landing page (event 1 deck, event 2 deck with the post-event Q&A appendix, event 3 deck with the updated slides). The same printed handout works across all three events.
Sales-team pitch decks. A sales team using the same pitch deck across hundreds of prospects benefits from a dynamic QR routing to a per-prospect landing page. Salesforce, Pipedrive, or HubSpot integration via API tags the prospect ID at QR generation.
The Pro tier at $10/mo and Max at $20/mo cover team workspaces (for L&D teams managing the training library jointly) and API access (for sales-ops teams piping per-prospect QRs into the CRM workflow). Most individual speakers stay on free or Lite. The pricing page is the canonical reference.
For a deeper comparison against other vendors, see the best QR code generators of 2026 and the best dynamic QR code generator shortlist.
Vendor comparison for presentation QRs
Most presentation QRs are static and the choice of vendor matters less than for printed restaurant or workplace signage. The differences that matter to speakers and training designers: a working free tier with no signup, no watermark on the free QR, and (for training programs) a permissive cancellation policy.
| Vendor | Free static QR | Watermark on free | Cancellation policy |
|---|---|---|---|
| EZQR | Yes — unlimited, no signup | No watermark | Codes redirect indefinitely after cancel |
| QR Tiger | Yes — limited | Watermark on free | Codes remain active per current ToS |
| QR Code Generator | Yes — limited | Watermark on free static | Deactivates dynamic on cancel |
| Me-QR | Yes — basic only | Watermark on free | Codes typically remain active |
| The QRCode Generator | Yes — static unlimited | No watermark | Static survives; dynamic deactivates |
| Mentimeter / Slido / Poll Everywhere | Free join-QR per session | No watermark on join-QR | Tied to active poll account |
| Flowcode | Limited free tier | Brand mark on free | Deactivates ~30 days after cancel |
Tips
- For the deck-handoff QR on a one-off keynote, any of the free no-watermark generators works. Most speakers we know default to EZQR or the QRCode Generator.
- For Slido, Mentimeter, and Poll Everywhere polls, use their built-in QR — the join-code routing is handled by the polling platform automatically.
- For training programs reused for years, the cancellation-policy filter matters. See the [permanent QR code guide](/blog/permanent-qr-code-generator-2026).
Designing slide QRs — size, error correction, contrast
Slide QRs have specific design constraints that print QRs do not. Projection adds glare, room lighting shifts contrast, and back-row attendees scan at distances most QR-size rules were not written for.
Size minimum. The QR should be at least 5-8% of slide width as a baseline, and 10-12% for poll QRs you want the whole room to scan in 30 seconds. On a 1920-wide projection, that is roughly 150-200 pixels wide for resource QRs and 250-300 pixels for poll QRs. Bigger is safer for large rooms.
Placement. Top-right corner for resource QRs (does not distract from the slide content); center-right or center-bottom for poll QRs (the audience is supposed to scan); bottom-right for the final-slide deck-handoff QR (the standard spot).
Error correction level. Use level Q for projected slides — projection often softens edges and Q (25%) absorbs the typical degradation. Use level H if you are overlaying a logo on the QR (logos cover up to 30% of the QR pattern and only H recovers reliably from that). The error correction levels guide covers the math, and the underlying ISO/IEC 18004 QR specification defines the four levels formally.
Contrast against the slide background. Black-on-white is the safest. Dark slide themes with a light QR can work if you confirm 4.5:1 WCAG contrast in the design file. The trap: brand-color QRs that look fine on the laptop but flatten under stage lighting. Test on the actual projector before relying on the design.
Quiet zone. Reserve at least four module widths of empty space around the QR. Designers regularly bleed slide background or graphics into the quiet zone and break the scan. The QR code best practices guide covers the geometry.
Logo overlay. If you put your brand logo in the center of the QR, use level H and keep the logo to under 20% of the QR area. Most slide-QR logo overlays we see are too big and the QR fails on back-row phones.
Pre-talk execution checklist
Before the talk, walk through the checklist. Most QR failures we see are last-mile execution issues, not design issues.
1. Generate the deck-handoff QR. Static URL QR is correct for most cases. Free URL QR generator works.
2. Confirm the destination loads on a fresh phone with no SSO state. If the destination requires login, fix the destination or pick a different one.
3. Generate the mid-talk poll QRs via Slido, Mentimeter, or Poll Everywhere — use the polling platform's built-in QR rather than wrapping a third-party QR around their join URL.
4. Generate the per-slide resource QRs. One per cited paper or tool. Skip slides without a concrete resource to link to.
5. Place QRs in the corners per the placement discipline above. Reserve the quiet zone.
6. Size to at least 5-8% of slide width for resource QRs, 10-12% for poll QRs.
7. Add a specific label adjacent to the QR. "Scan for the deck," "Scan for the 2024 GS1 study," or the actual poll question. The call-to-action design guide covers the verb discipline.
8. Export the deck to PDF and confirm the QRs scan from the PDF — exporters sometimes downsample images and break the QR pattern.
9. Open the deck in the actual presentation tool (Keynote, PowerPoint, Google Slides) and walk through it in present mode. Scan every QR on the actual projection setup if you have access.
10. On the day of the talk, scan-test the deck-handoff QR and the first poll QR before doors open. Venue lighting is different from office lighting. The events and conferences pillar covers the broader pre-event verification.
11. During the talk, point at the QR and name what scanning will do. Speakers who explicitly call attention to the deck QR see twice the download rate of speakers who leave it on the slide without a verbal prompt.
12. After the talk, send the email anyway — for the attendees who did not scan in the room. The QR captures the 60-75%; the email captures another 5-10%.
The bottom line
The single thesis of this post: live QR handoff at the moment of attention beats post-talk email delivery by roughly 3x. That gap is the whole reason to put a QR in a presentation deck. Everything else — mid-talk polls, per-slide resources, academic posters, training workbooks — is the same pattern applied at finer granularity.
Most speakers do not need a paid QR plan. The free static URL QR generator covers the deck-handoff use case; the vCard QR generator covers the academic-poster author-contact use case. Slido, Mentimeter, and Poll Everywhere handle mid-talk polling with their built-in QR join codes; do not wrap a third-party QR around their URLs.
For training designers running multi-deck programs reused across years and frequent-speaker decks routed through a per-event landing page, Lite at $5/mo covers the dynamic redirects and the per-event attribution. The cancellation-policy filter matters here — if the QR dies a year into the training program, every printed workbook breaks. The permanent QR code guide covers the vendor-by-vendor policy.
For the broader context, the events and conferences pillar covers the conference setup around the talk, and the marketing pillar covers the post-talk follow-up workflow. The workplace QR pillar covers the training-room deployment for L&D teams running the same decks inside the organization.
If you only do one thing after reading this post: put a QR on your final slide tomorrow and watch the download rate. The data convinces every speaker faster than any post can.
