How to make a QR code
- Type or paste a link or some text. The code updates as you type.
- Change the colors and shape if you like, and add a logo in the middle.
- Pick a size and an error correction level. Medium is fine for most uses; a logo switches it to High.
- Download PNG for documents, slides and posts, or SVG for print, where it stays sharp at any size.
- Scan it with your phone before you print it, to be sure it opens the right place.
Questions
Does it expire? No. The code is the text itself, so it works for as long as the link inside it does. Nothing is stored on a server, which also means we can’t change it later.
Is the text sent anywhere? No. The code is drawn in your browser.
What does error correction do? It adds backup data, so a code still scans if part of it is dirty, torn or covered by a logo. Each step up is more robust and a little denser.
Why is there a border? Scanners need a plain margin around the code to find its edges. Four squares is the standard; you can make it thinner if the code sits on a plain background anyway.
Which colors scan best? Dark dots on a light background, with plenty of difference between them. Light dots on dark do work on most new phones, but not all, and the page warns you when the colors are too close.
Will a logo stop it from working? Not if it stays small. The middle of the code is left empty for it and error correction goes up to High, so the missing part is rebuilt from backup data. Keep the logo on Small or Medium if a scanner struggles.
Can I make the background see-through? Yes. Both the PNG and the SVG keep the transparency. Put it on something plain and light so phones can still find it.