Choose a QR code when a phone should open a link or read richer text. Choose a conventional linear barcode when an established inventory, retail, or logistics system expects a specific barcode symbology.
Quick comparison
| Question | QR code | Linear barcode |
|---|---|---|
| Shape | Two-dimensional square | One-dimensional bars |
| Typical content | URLs, text, contact or payment data | Product or record identifier |
| Common scanner | Phone camera or 2D scanner | Laser, imaging, or retail scanner |
| Damage tolerance | Built-in error-correction options | Depends on the selected symbology and print quality |
When a QR code fits
- Sending people to a website, menu, form, map, or profile.
- Encoding text or structured actions a compatible phone can interpret.
- Scanning from different orientations with a modern camera.
- Using error correction for a code that may experience limited dirt or damage.
When a barcode fits
- A warehouse, retail, library, or logistics system already specifies the symbology.
- The code only needs to carry a short identifier looked up in a database.
- Existing labels, printers, and scanners are designed for a linear format.
- A trading partner has provided exact size, quiet-zone, and data requirements.
Make either code easier to scan
- Use dark marks on a plain, light background with strong contrast.
- Preserve the empty quiet zone around the code.
- Do not stretch, crop, blur, or decorate functional areas.
- Export at enough resolution for the final physical size.
- Test the actual printed sample with the devices people will use.
QR error correction is a tradeoff
Higher error-correction levels can restore more damaged data, but add modules and may make the QR symbol denser. The right level depends on the data length, printed size, surface, and scanning conditions. Read DENSO WAVE's official explanations of QR error correction and the required quiet zone when preparing production material.