Error Correction Levels Explained
Understand L/M/Q/H levels and how to choose the best option for your QR code.
Intro
Error correction allows QR codes to be read even if parts are damaged, but higher levels reduce capacity.
Preparation
Confirm data length and whether a logo will be used before choosing the level.
Steps
Use M for clean indoor prints, Q/H for logos or harsh environments, and shorten data when needed.
Example
A product label improved scans by switching from L to Q and shrinking the logo area.
Mistakes
Always setting the highest level can make dense codes harder to scan.
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- Logo present?
- Outdoor use?
- Data length
- Sufficient size
- Test print
Operations
Create team guidelines that map use cases to a recommended level.
Aftercare
If the design changes, re‑evaluate the error‑correction level and re‑test.
Tips
Balance environment and data length. Test the final printed version, not just on screen.
FAQ
Is higher always safer?
It improves recovery but reduces capacity and can increase density.
Minimum for logos?
Q is recommended; use H for larger logos or tough environments.
Can I change the level later?
You need to regenerate the QR code with the new level.
Key takeaways
- Higher correction improves resilience
- Use Q/H when adding logos
- More correction means less capacity
Ready to create a QR code?
Apply the guide and generate your QR now. We also recommend reviewing the related policies.