How do I make my QR code work again?
Most “dead” QR codes can be revived by fixing contrast, quiet zones, size vs distance, print quality, or data density. Use the quick checklist below.
💡 Quick Wins to Make Your QR Code Work Again
- Contrast: dark modules on a light, matte background. Avoid pale colours and metallic inks.
- Quiet zone: add a clear border at least 4 modules wide—no logos or text intruding.
- Size vs distance: rule of thumb → scan distance ≈ 10× code width.
- Clean artwork: export vector (SVG/PDF) or 300–600 DPI PNG. Don’t stretch or compress.
- Reduce density: shorten the URL or switch to dynamic QR to enlarge modules.
- Tame glare & curvature: use matte stock, keep the code flat, and avoid folds.
- Link health: use HTTPS and avoid chained redirects that some scanners block.
Apply the fixes, then re-test with iPhone Camera and Android Camera/Lens under normal indoor and outdoor light.
Top Causes & Fast Fixes
- Low contrast: black (or very dark) on white works best.
- No quiet zone: keep 4+ module padding clean on all sides.
- Too small: enlarge for posters or long viewing distances.
- Overloaded data: shorten links; enable dynamic editing.
- Glare/curvature: matte finishes; flat placement.
- Soft printing: vector artwork; 300–600 DPI; no blur.
Step-by-Step: Bring Your QR Code Back to Life
- Confirm the problem: test on iPhone Camera and Android Camera/Lens.
- Check the URL: ensure HTTPS, remove aggressive trackers, minimise redirects.
- Fix visuals: high contrast, correct quiet zone, no artwork invading modules.
- Right-size: match code size to viewing distance (≈10× rule).
- Lower density: shorten or use dynamic QR with high error correction.
- Re-export & print: SVG/PDF or 300–600 DPI PNG on matte stock.
- Re-test in situ: check typical light angles; wipe surface; keep flat.
FAQs
What usually breaks a QR code?−
Low contrast, missing quiet zone, small size for the distance, glare/curvature, or a dense code from long URLs.
How big should it be for posters?+
Use the 10× rule: if people stand 2 m away, aim for a code at least 20 cm wide.
Can I place a logo in the centre?+
Yes, but keep it modest and never touch the quiet zone. Use higher error correction.
Do dynamic QR codes help?+
They allow short, editable links, which keeps modules larger and scans more reliable—plus analytics.
Why does it open slowly?+
Heavy redirects, slow hosting, or blocked trackers. Use a clean HTTPS landing page and minimal redirects.
Talk to an Xcan Specialist
Need a quick fix? Send us your artwork and where it’s placed—we’ll suggest a print-ready correction.
Tip: dynamic QR + short URL + matte stock = fewer scan failures.
