# Check a design with the scan score (Help)

URL: https://qrdx.dev/docs/help/designing/scan-score
Source: https://github.com/bucharitesh/qrdx/blob/main/apps/docs/content/docs/help/designing/scan-score.mdx

The scan score tests your design the way a phone camera sees it, and tells you what to fix.

Every design in the playground gets a **Scan score** from 0 to 100. It's shown under the preview, for example "Scan score 92 · Great".

## What the score means [#what-the-score-means]

- **Great** (85 or more): ready to print.
- **OK** (65 to 84): it should scan, but check the warnings.
- **Risky** (below 65): fix the checks marked with a cross.
- **Fails**: the code didn't decode in testing, or the contrast is far too low. Don't print it.

## See what to fix [#see-what-to-fix]

Click the score. The **Will it scan?** panel lists every check, with the failed ones first.

The score checks:

- **Decoding**: the code is read at small sizes with a camera-like blur.
- **Contrast**: the code and background should differ by 4.5:1 or more.
- **Dark on light**: dark codes on light backgrounds scan in more apps.
- **Logo size**: a logo must not cover more than error correction can rebuild.
- **Eye shape**: circle and curly eyes fail in some scanner apps.
- **Clear space**: the empty border around the code. Four modules is ideal.

## Quick fixes [#quick-fixes]

- Low contrast: make the code darker or the background lighter. See [Choose colors that scan](https://qrdx.dev/docs/help/designing/colors-and-contrast).
- Logo covers too much: set **Error correction** to **High**. See [Add a logo](https://qrdx.dev/docs/help/designing/logos).
- Eyes: switch to square, rounded or gear eyes.
- Clear space: set **Padding** to **Standard** or **Large**.

## Check a printed code [#check-a-printed-code]

The score tests the design on screen. To test a code you already printed, take a photo and drop it into the [scan checker](https://qrdx.dev/tools/scan-checker). The image never leaves your device.

## Related [#related]

- [A code won't scan](https://qrdx.dev/docs/help/troubleshooting/wont-scan)