A QR code with your logo in the center looks intentional. A plain black-and-white QR looks like an afterthought. The difference in perceived professionalism is significant — and the technical work to add a logo without breaking scan reliability is something QRSync handles automatically.
This page covers how logo upload works in QRSync, the design guidelines for QR-friendly logos, and the trade-offs to consider.
How logo overlay works
QR codes have built-in error correction that lets a scanner recover the original data even when part of the pattern is damaged or obscured. Four levels:
| Level | Recovers from | Use case |
|---|---|---|
| L (Low) | ~7% damage | Clean, no logo |
| M (Medium) | ~15% damage | Small logo |
| Q (Quartile) | ~25% damage | Standard logo |
| H (High) | ~30% damage | Large logo or rough conditions |
When you upload a logo to QRSync, the generator:
- Calculates the logo’s area as a percentage of the QR
- Automatically bumps error correction to a level that covers the loss
- Places the logo centered, with a small clear-background border (2–4 modules) to prevent edge blur
- Verifies the QR pattern remains decodable
You don’t need to think about error correction levels — the generator picks the right one based on your logo size. You can manually override if you have a specific need.
Logo size guidelines
Under 15% of QR area: safe with default error correction (M). Looks subtle, doesn’t dominate.
15–22% (recommended sweet spot): safe with error correction Q. Visually present without overpowering. This is QRSync’s default.
22–25%: safe with error correction H. Logo is prominent; QR pattern feels denser around it.
Above 25%: risky. Scan reliability drops on lower-end devices. Consider whether you really need a logo this large or whether the design should adjust.
QRSync’s UI shows the percentage in real time as you resize the logo. Stay in the green zone.
Logo file format
SVG (recommended). Vector format scales without loss. Best for print at any size. Works for any solid-shape logo.
PNG with transparent background. Bitmap format. Best for digital use or smaller print sizes. Transparency lets the QR’s background show around the logo edges.
JPG. Acceptable but not preferred. No transparency support means you need to ensure the JPG’s background color matches your QR’s background exactly. Compression artifacts also slightly reduce scan reliability.
Avoid:
- GIF (limited color, often dithered)
- TIFF (large file, no advantage)
- Animated formats (the QR is a static image)
What makes a good QR-center logo
Logos that work well as QR overlays share characteristics:
Simple, high-contrast. A logo with clear, solid shapes scans well. Detailed logos with fine line work get illegible at QR-center size.
Single dominant color or wordmark. Logos with many colors and gradients distract from the QR pattern visually.
Square or roughly square aspect ratio. The QR is square; circular or square logos fit naturally. Long horizontal logos either get cropped or take up too much width.
Solid background (or transparent). A logo with photo backdrop blends into the QR pattern. Use a logo with a clear background, or place a solid colored shape behind your logo before exporting.
Recognizable at small size. A 1 cm × 1 cm logo in the center of a 5 cm QR is small. If your logo isn’t readable at that size, simplify it before using.
What doesn’t work well
Common patterns that look fine in a design mockup but break the scan:
- Photos of products or people — too much color variation, edges blur into the pattern
- Logos with fine line work — pixelate at small sizes
- Wordmarks longer than 3–4 characters — get illegible at QR-center scale
- Gradient-only logos — hard to distinguish from the QR pattern
- Logos with the same color as the QR foreground — disappear into the pattern
If your brand has a complex logo with these issues, use a simplified mark for QR overlays. Most brand systems include this (often called the “icon mark” or “monogram”). If yours doesn’t, this is a good time to design one — it’ll have many uses beyond QR codes.
Where logo QRs shine
Some placements where logo overlay materially improves perceived quality:
- Business cards — generic QRs feel impersonal; logo QRs feel deliberate
- Premium product packaging — luxury and craft brands lose impact without a logo overlay
- Marketing campaigns — branded QRs reinforce brand recognition every scan
- Event signage — at conferences and trade shows, branded QRs distinguish you from competitor booths
- Restaurant materials — a logo on the table tent QR feels intentional rather than disposable
Where logos matter less:
- WiFi QRs in functional contexts — guests just want to connect, not see your brand
- Internal/utility QRs — equipment tags, asset codes, etc.
- One-off temporary signage — events, sales, time-bound campaigns where the QR’s lifespan is short
A practical workflow
- Pick your logo file — SVG preferred, PNG with transparency acceptable
- Upload via QRSync’s logo button in the customization panel
- Adjust size until it’s in the 15–22% range (QRSync shows the live percentage)
- Choose a clear-background border if your logo has a transparent background — a 2–4 module margin prevents edge confusion
- Test scan with two phones from a printed proof
- Iterate if needed — if the scan reliability is iffy, shrink the logo by 5% and re-test
The whole process takes about 90 seconds once your logo is ready.
What if my logo doesn’t fit?
Common issues and fixes:
- Logo is too tall/wide: Crop or use a square version of your brand mark
- Logo has fine details: Simplify to the boldest shape or letter
- Logo color matches QR foreground: Add a solid-color background shape behind the logo
- Logo has busy edges: Add a clear-background buffer or simplify the silhouette
If you’ve tried these and the QR still doesn’t scan reliably, the issue is usually that the logo is too big or too detailed. A 10% logo overlay almost always works; consider whether you really need a 25% one.
Print quality matters
A well-designed logo QR can still fail at scan time if the print quality is poor. Considerations:
- Print at 300 DPI minimum — pixel-doubled logos look bad and scan worse
- Use coated paper or vinyl for prints that get handled — uncoated paper survives less time
- Avoid embossing or foil over the QR — these substrates reflect light and confuse scanners
- Test the printed output — what looks fine on screen sometimes fails in print
For high-volume runs (10,000+ business cards, large packaging runs), print a sample first and scan-test it.
Ready to brand your QR?
Add your logo to a QR code — free, takes 30 seconds. Upload your logo, adjust the size, preview the scan, download in your preferred format. Works on static codes (no signup needed) and dynamic codes (signup required for analytics).