What is Reddit's opinion of QuickMark?

From 3.5 billion Reddit comments

Here is mine! <3

For those of us without smartphones, use this add-on.

Edit: Changed the link, since this one works more consistently.

Try a local QR reader instead of a webapp. As crowley said, brightness can be an issue. Try adjusting brightness on the device or the camera itself.

A couple local readers found from a quick search.

http://www.quickmark.com.tw/En/basic/index.asp

http://dansl.net/qrreader/