Review QR Design Risks Before You Download
QRLynx calculates a live 0-100 Scan Score from six parts of the QR content and design. Use the breakdown to improve the generator settings, then test the exported code in its real placement.
Selected QR Code Type
What the QRLynx Scan Score means
The QRLynx Scan Score is a design estimate calculated inside the QR generator. It starts at 100 and applies penalties when the current content or design introduces conditions associated with harder scanning. The score updates as you change colors, logo size, payload length, error correction, or module style.
It is a practical design review, not an AI model, device guarantee, ISO certification, or physical print inspection. The result helps you catch adjustable design risks before download. A final test of the exact exported file, material, size, lighting, distance, and destination remains part of a responsible release.
The six scoring sections
Each section reads a current generator input and contributes independently to the final score.
Body contrast
Compares the foreground and background colors with the WCAG relative-luminance formula, then assigns up to 25 score points.
Finder-eye contrast
When the finder-eye color differs from the body color, compares it separately with the background for up to 10 points.
Logo size
Uses the logo size relative to the QR canvas and applies larger penalties as the configured logo occupies more space.
Estimated data density
Estimates QR version and modules per side from the payload mode and byte length, with higher-density inputs receiving larger penalties.
Error correction
Uses the configured L, M, Q, or H level. Higher recovery settings retain more score, while the QR pattern may also become denser.
Module style
Scores classic squares most conservatively and applies small penalties to rounded, dot, or circle treatments.
What the score reads and what you can change
The breakdown names the setting that affected the score so you can adjust the design deliberately.
| Scoring section | Current input | Practical adjustment |
|---|---|---|
| Body contrast | Foreground and background colors | Use a darker foreground or lighter background |
| Finder-eye contrast | Eye color when different from the body | Increase eye-to-background contrast |
| Logo size | Logo width relative to QR canvas | Reduce the logo when it covers too much of the pattern |
| Data density | Payload mode and estimated byte length | Shorten the encoded content when the destination permits |
| Error correction | Configured L, M, Q, or H level | Choose the level that fits the design and operating conditions |
| Module style | Classic, rounded, dots, circles, or another supported style | Use a simpler module treatment when reliability is the priority |
How to use Scan Score in the QRLynx generator
Review the score while the QR is still editable, then validate the final artifact outside the score.
Enter the real QR content
Choose the correct QR type and use the actual destination or payload. Data length and encoding mode affect the density estimate.
Open the Scan Score breakdown
Select the score below the QR preview to see the current label, individual reasons, and point impact for each applicable section.
Adjust one design input at a time
Improve contrast, reduce an oversized logo, reconsider dense content, choose an appropriate error-correction level, or simplify the module style.
Download the intended format
Export the QR in the format and size you plan to use. The Scan Score evaluates generator settings rather than the downstream artwork or printing process.
Test the final placement
Scan the exact printed or displayed artifact with several devices at the intended distance and lighting, and confirm that it opens the correct destination.
Design preflight
Create the QR and review its live Scan Score
Use the real payload, adjust the six scored design inputs, then download and test the exact placement before release.
How QRLynx labels the score
The label summarizes the six-section estimate. It does not replace a real scan test.
| Score | Label | Recommended next step |
|---|---|---|
| 80-100 | Excellent | Keep the design, then test the final placement |
| 60-79 | Good | Review the listed deductions before download |
| 40-59 | Fair | Adjust the largest design penalties and test again |
| 0-39 | Poor | Revise colors, logo, density, correction, or style before release |
What the final real-world test adds
The live score knows the current generator colors, logo dimensions, content length, error-correction setting, and module style. It does not inspect the exported file after another design tool changes it, measure the printed quiet zone, grade printer distortion, account for glossy glare, know the viewing distance, test a curved surface, or simulate every camera.
Use the score early, then test the exact artifact late. Scan the final file or print with more than one phone, from the expected distance, under realistic lighting. Use the QRLynx QR Code Scanner to confirm that the image decodes to the intended payload, and use the QR Code Size Calculator when placement distance determines the required dimensions.
For the underlying symbol rules, ISO/IEC 18004:2024 defines QR symbology, formats, dimensions, error correction, decoding, and production-quality requirements. DENSO WAVE explains how data amount, version, module count, and error-correction choice interact. QRLynx uses those concepts as product inputs, while the Scan Score remains a QRLynx design heuristic rather than a standards certification.
QRLynx Scan Score questions
Current answers about inputs, labels, limitations, and testing.
Is the QRLynx Scan Score an AI scan test?
No. It is a deterministic calculation over six current generator inputs: body contrast, finder-eye contrast, logo size, estimated data density, configured error correction, and module style.
Does a score of 100 guarantee that every phone will scan the QR code?
No. The score evaluates generator settings, not every camera, lighting condition, material, viewing angle, distance, print process, or later artwork change. Test the final placement with several devices before release.
Does Scan Score certify ISO/IEC 18004 compliance?
No. ISO/IEC 18004 defines the QR code symbology and production requirements. QRLynx uses relevant concepts such as contrast, versions, modules, and error correction, but its 0-100 score is a product heuristic rather than an accredited barcode verification or certification result.
How does QRLynx calculate QR color contrast?
The score uses the WCAG relative-luminance formula to compare foreground with background. When the finder-eye color differs from the body color, it receives a separate contrast calculation. These ratios are useful design signals, not a substitute for testing the final medium.
Why can a longer destination reduce the score?
More encoded data can require a higher QR version and more modules per side. At the same physical size, that creates smaller modules. QRLynx estimates version from payload mode and byte length and applies larger density penalties at higher estimated versions.
How does a logo affect Scan Score?
QRLynx compares the configured logo width with the QR canvas. Logos above 10% of that width begin receiving a penalty, with larger deductions above 20% and 30%. The calculation is a design warning, so test the exported QR after adding any logo.
Which error-correction level gets the highest Scan Score?
The current score gives H no deduction, Q a small deduction, M a larger deduction, and L the largest deduction. Higher error correction also adds redundancy and can increase pattern density, so choose it with the payload, logo, size, and operating conditions in mind.
Does Scan Score check the quiet zone or print DPI?
The current six-section score does not inspect quiet-zone cropping, exported-file DPI, printer distortion, coating, glare, surface curvature, or scan distance. Review those conditions in the final artwork and physical test.
Do I need an account to use Scan Score?
No. The score appears with the QR preview in the public generator once there is content to evaluate. Account and plan rules still apply separately to saving, dynamic QR capacity, and download formats.
What should I test after the score looks good?
Download the intended format, place it at the final size, and scan it with several phones under realistic lighting and distance. Confirm both first-attempt readability and the exact decoded destination or payload.