What this QR code generator does
It turns a link, a block of text or a Wi-Fi network into a QR code and lets you download it as a PNG or an SVG. Everything is encoded in your browser, so the text, network name and password never reach a server. That matters for Wi-Fi codes, where the password is literally part of the image.
The code is static: the data is stored inside the pattern itself, so it keeps working forever and does not depend on this site or on a redirect service.
Size, error correction and colours
Error correction decides how much of the code can be damaged or covered before it stops scanning: L recovers about 7% of the pattern, M about 15%, Q about 25% and H about 30%. Higher levels survive more wear and a partially covered corner, but they also pack more redundancy into the same square, so the modules get smaller for the same content. M is the sensible default; use H if the code will be printed small, laminated, or placed where it can be scratched.
Keep the quiet zone: the blank margin around the pattern is what scanners use to find its edges. Removing it is a common reason a code that looks fine will not scan. Keep the foreground dark and the background light, and test the printed size — anything much under two centimetres square is unreliable for a phone camera at arm’s length.
Wi-Fi codes share the password
A Wi-Fi QR code is a convenience format that iOS and Android both understand: scanning it offers to join the network without anyone typing the password. Because the password is written into the code in plain text, treat a printed Wi-Fi code exactly like a written-down password. Change the network password and every old code stops working.
Frequently asked questions
Are the QR codes generated on a server?
No. The encoding and the PNG/SVG rendering both run in your browser, so the content is never uploaded. You can confirm it in the DevTools Network tab while generating a code.
Which error correction level should I use?
M (about 15% recoverable) is a good default for screens and ordinary print. Choose H when the code may be creased, scratched or partly covered, and L when the content is long and you need the smallest possible pattern.
Do these QR codes expire?
No. This tool creates static codes: the content lives inside the pattern, so there is no redirect and nothing to expire. Dynamic QR codes, which point at a short link, do expire or stop working if the link service is discontinued.
Why will my phone not scan the code?
The usual causes are too little contrast, a missing quiet zone, a printed size that is too small, or a screen brightness that is too low. Try downloading the PNG at 512px or larger and scanning it from a second screen to separate a content problem from a printing problem.
What is the difference between the PNG and the SVG?
PNG is a fixed-size image and is the safe choice for chat apps, slides and websites. SVG is vector, so it stays sharp at any print size — use it for posters, packaging and anything going to a printer.
Can I use the generated code commercially?
Yes. The code is generated locally from your own content and there is no watermark or licence restriction on the output. As always, do not put a third party’s trademark or logo into a code you do not have the right to use.