How we verify this guide
Before this page is included in the public guide directory, its examples are compared with the payload produced by the linked QRFlow generator and with the export and scan-readiness controls available in the current build. Camera, lighting, paper, print size, and destination apps can still change the result, so important print runs should always be tested on the final material and real devices.
Poster QR codes usually fail because they’re too small for the distance or placed where glare/shadows kill contrast. Here’s a practical sizing rule.
Rule of thumb (simple)#
A practical guideline: QR size ≈ scan distance ÷ 10. Example: if people scan from ~2 meters, aim for ~20 cm QR. If you’re unsure, go bigger.
Distance → recommended QR size#
Use the larger end if your payload is long (UTM-heavy links, big vCards) or the print quality is not perfect.
| Typical scan distance | Recommended QR size |
|---|
| 0.5 m (arm’s length) | 5–7 cm |
| 1 m (standing close) | 8–12 cm |
| 2 m (hallway / wall poster) | 15–25 cm |
| 5 m (big signage) | 40–60 cm |
Placement tips that matter#
- Put the QR on a flat, matte surface if possible (glossy reflections are scan killers).
- Keep a clean quiet zone (blank margin) around the QR — do not let background graphics touch the edges.
- Avoid heavy shadows and extreme angles. Keep it at a comfortable height (roughly chest/eye level).
- If the QR points to a URL, keep it short and stable (see: Short URL strategy).
Export for print#
Use SVG so edges stay sharp at large sizes. If you must use PNG, export high resolution and never upscale later. See: SVG vs PNG.
Fast test routine (do this once)#
- Print a test on the same material/finish.
- Scan on iPhone + Android under the real lighting.
- Test from the real distance (don’t test at 20cm if users will be 2m away).
- If it’s slow: increase size first, then simplify payload.
Recommended templates
URL QR Code
Convert a website link to a QR code instantly, then download a clean SVG or PNG.
Redirect QR Code
Create a redirect QR code for campaigns, menus, packaging, posters, and any QR that may need a controlled destination path.
Business Card QR Code
Create a vCard QR and complete front/back business card artwork with real trim, bleed, safe-area, and print checks before ordering cards.
WiFi QR Code
Create the WiFi QR and a print-sized guest card or fold tent locally, then scan-test the physical result on iPhone and Android.
YouTube QR Code
Turn the right YouTube destination into a QR code, then check the scan flow before using it on posters, packaging, slides, or merch.
Instagram QR Code
Create an Instagram profile QR on desktop/web and download PNG or SVG for cards, packaging, posters, creator kits, or quick sharing.
Use cases & print ideas
Matching pages that explain where this QR type works best before you open the generator.
Use 20-25 mm (0.8-1.0 in) for most business cards. Includes minimum size guidance for short URLs, larger sizing for vCards, quiet zone rules, and a card dimensions chart.
How to add a QR code to a business card (visiting card) in Canva: generate the right QR (vCard vs URL), download SVG/PNG, keep a quiet zone, and export for print.
Canva QR code generator: create a URL QR in Canva, or generate vCard/WiFi/social QR codes with QRFlow and upload — plus print-ready export tips.
Choose SVG for resizing and PNG for fixed-size output. Calculate print pixels, preserve the quiet zone, and test the final exported artwork.
Why quiet zone is non-negotiable, how to choose colors that scan, and what backgrounds (patterns, gradients) break QR detection.
Pick the right error correction level for print/screens/logos. Learn the trade-off: higher correction = denser QR = needs larger print.
Try it now
Generate QR codes locally in your browser — no uploads.