Why make your own QR code instead of using a link shortener
Plenty of link-shortening services will also spit out a QR code for you, but that convenience comes with a catch: the code usually points to their shortened link, not directly to your destination, which means the code stops working if that service ever shuts down, and the scan often routes through an extra redirect and sometimes an ad-supported landing page first. Generating the QR code yourself, from a tool that encodes your content directly, avoids all of that — the code you create points straight at your actual link or content, with no third party sitting in the middle and no dependency on that service staying online.
What you can actually encode in a QR code
A QR code isn't limited to URLs — it can hold any text data, which opens up a few underused options. A plain URL is the most common use, turning a link into something scannable from a printed flyer or screen. Wi-Fi details, formatted as WIFI:T:WPA;S:NetworkName;P:Password;; let a phone join a network directly from a scan instead of someone typing a password by hand. Plain text works too — a short note, a coupon code, or event details someone can read without needing an internet connection at all, since the text is stored directly in the code rather than fetched from a server.
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Choosing the right error correction level
Error correction is the setting people skip past without realizing what it does — it controls how much redundant data is baked into the code, which is what lets a scanner still read it correctly even if part of the code is scratched, faded, or covered. Low error correction produces the least dense, easiest-to-scan-from-a-distance code, which is fine for something displayed cleanly on a screen. Medium is a reasonable default for most everyday uses. Quartile and High are worth the slightly denser pattern for anything printed and handled physically — a business card, a product label, a flyer stuck up outdoors — and High specifically is the right choice if you plan to place a small logo in the center of the code, since it needs enough spare redundancy to survive that part being covered.
Designing a QR code that actually scans
A surprising number of QR codes fail to scan not because of a technical error but because of avoidable design choices. Contrast matters more than color choice — a scanner needs to clearly distinguish the dark modules from the light background, so a low-contrast pairing (pale gray on white, for instance) can fail even though it looks perfectly readable to a human eye. Leave a clear quiet zone — a blank margin — around the code rather than crowding other design elements right up against its edge, since scanners use that margin to first detect where the code starts. And don't shrink a printed code below roughly an inch (2–3 cm) square; below that, most phone cameras struggle to resolve the individual squares cleanly, especially from a normal reading distance rather than right up close.
Testing before you commit to print
Before printing a QR code on hundreds of flyers or a permanent sign, scan it yourself first — ideally with more than one phone, from a couple of different distances, and under lighting that's closer to where it'll actually be used than a bright, evenly lit desk. A code that scans instantly on a laptop screen can behave differently once it's printed at a smaller size, laminated behind glare-prone plastic, or viewed under dim event lighting. That five-minute test before committing to a print run is far cheaper than reprinting a batch of materials with a code that doesn't reliably scan in the real conditions people will actually encounter it in.