> For the complete documentation index, see [llms.txt](https://docs.sqr.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sqr.co/questions-and-answers.md).

# Questions and Answers

- [About QR codes in general](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general.md): We answer all your questions about QR codes
- [How do you read a QR code?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/how-do-you-read-a-qr-code.md)
- [What is a QR code generator?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/what-is-a-qr-code-generator.md)
- [What Information Is inside a QR Code?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/what-information-is-inside-a-qr-code.md)
- [What is the difference between a static QR and a dynamic one?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/what-is-the-difference-between-a-static-qr-and-a-dynamic-one.md)
- [What does Static and Dynamic QR codes mean?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/what-does-static-and-dynamic-qr-codes-mean.md)
- [What are QR codes useful for?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/what-are-qr-codes-useful-for.md)
- [Can QR codes be scanned without an app?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/can-qr-codes-be-scanned-without-an-app.md)
- [What kind of information can be stored in a QR code?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/what-kind-of-information-can-be-stored-in-a-qr-code.md)
- [Can my smartphone scan QR codes?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/can-my-smartphone-scan-qr-codes.md)
- [Is it possible to create different QR codes for the same content](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/is-it-possible-to-create-different-qr-codes-for-the-same-content.md)
- [Do QR codes have to be black and white?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/do-qr-codes-have-to-be-black-and-white.md)
- [What should I know before printing my QR codes?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/what-should-i-know-before-printing-my-qr-codes.md)
- [How to read/scan a QR code?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/how-to-read-scan-a-qr-code.md)
- [What is the minimum size of a QR code?](https://docs.sqr.co/questions-and-answers/about-qr-codes-in-general/what-is-the-minimum-size-of-a-qr-code.md): The minimum size of a QR code for it to be read correctly is 0,4 inches or 1cm.
- [About SQR](https://docs.sqr.co/questions-and-answers/about-sqr.md)
- [How long are QR codes valid for? Do they expire?](https://docs.sqr.co/questions-and-answers/about-sqr/how-long-are-qr-codes-valid-for-do-they-expire.md)
- [What graphic formats do the generated QR codes support?](https://docs.sqr.co/questions-and-answers/about-sqr/what-graphic-formats-do-the-generated-qr-codes-support.md)
- [How do I manage QR codes with SQR code generator?](https://docs.sqr.co/questions-and-answers/about-sqr/how-do-i-manage-qr-codes-with-sqr-code-generator.md)
- [Can I customize a QR code with my company logo or icon?](https://docs.sqr.co/questions-and-answers/about-sqr/can-i-customize-a-qr-code-with-my-company-logo-or-icon.md)
- [Can a QR code be edited/changed?](https://docs.sqr.co/questions-and-answers/about-sqr/can-a-qr-code-be-edited-changed.md)
- [Are QR codes free?](https://docs.sqr.co/questions-and-answers/about-sqr/are-qr-codes-free.md)
- [Is it possible to count the QR code scans (tracking, analytics)?](https://docs.sqr.co/questions-and-answers/about-sqr/is-it-possible-to-count-the-qr-code-scans-tracking-analytics.md)
- [How do I generate a large batch of QR codes?](https://docs.sqr.co/questions-and-answers/about-sqr/how-do-i-generate-a-large-batch-of-qr-codes.md)
- [Is there a scan limit for the QR codes?](https://docs.sqr.co/questions-and-answers/about-sqr/is-there-a-scan-limit-for-the-qr-codes.md)
- [Can I use the generated QR codes for commercial purposes?](https://docs.sqr.co/questions-and-answers/about-sqr/can-i-use-the-generated-qr-codes-for-commercial-purposes.md)
- [Why is my QR code not working?](https://docs.sqr.co/questions-and-answers/about-sqr/why-is-my-qr-code-not-working.md)