QR Generator
A printed QR does not expire. If you put a Wi‑Fi password or a one-time login in it, that secret lives as long as the paper does.
A printed QR does not expire. If you put a Wi‑Fi password or a one-time login in it, that secret lives as long as the paper does.
Type the payload. Download SVG for print, PNG for screens. If this is a Wi‑Fi code, treat the PNG like a sticky note with the password on it.
How to use it
- Static QR, static payload. Changing the URL later means printing again, or using a short link you control.
- Wi‑Fi QR is
WIFI:T:WPA;S:network;P:password;;. The password is in the code. Anyone who scans joins. Don’t tape it on a café window unless that’s the point. - SVG for print. PNG for slides and chat. A 200px PNG on a poster is why people can’t scan it from a metre away.
- Error correction (L/M/Q/H) lets you cover a corner with a logo. H survives more damage and makes a denser code. Don’t crank H and then shrink it.
When it breaks
- Too much text (a full vCard with a photo) makes a dense code that cheap cameras miss. Shorten the payload, don’t just enlarge the PNG.
- Screen-of-a-screen scans fail. Don’t photograph a QR off another monitor if you can paste the URL.
- This does not make a tracking link. If you need “this poster vs that poster,” use two URLs, not two colors.
Content
https://onedev.tools Style
Dot style
Corner square
Corner dot
Center logo
Preview
Features
- Static QR: the payload never expires unless you change the URL behind it
- WiFi payload is WIFI:T:...;P:password;; treat it like printing the password
- SVG download for print; PNG for screens
- Error correction H when a logo covers modules
Common Use Cases
- Print a poster QR that must still work in five years
- Share WiFi without typing, knowing the code is the PSK
- Export SVG so a 2-meter vinyl stays scannable
- See how a logo forces higher error correction
A printed QR does not expire
A printed QR does not expire. If you put a Wi‑Fi password or a one-time login in it, that secret lives as long as the paper does.
Type the payload. Download SVG for print, PNG for screens. If this is a Wi‑Fi code, treat the PNG like a sticky note with the password on it.
Static QR, static payload. Changing the URL later means printing again, or using a short link you control. Wi‑Fi QR is WIFI:T:WPA;S:network;P:password;;. The password is in the code. Anyone who scans joins. Don’t tape it on a café window unless that’s the point.
SVG for print. PNG for slides and chat. A 200px PNG on a poster is why people can’t scan it from a metre away. Error correction (L/M/Q/H) lets you cover a corner with a logo. H survives more damage and makes a denser code. Don’t crank H and then shrink it.
Examples
https://onedev.tools/qr/generatorWIFI:T:WPA;S:GuestNet;P:change-me-now;H:false;;Frequently Asked Questions
A printed QR does not expire. If you put a Wi‑Fi password or a one-time login in it, that secret lives as long as the paper does. Static QR, static payload. Changing the URL later means printing again, or using a short link you control.
Wi‑Fi QR is WIFI:T:WPA;S:network;P:password;;. The password is in the code. Anyone who scans joins. Don’t tape it on a café window unless that’s the point. If this is a Wi‑Fi code, treat the PNG like a sticky note with the password on it.
SVG for print. PNG for slides and chat. A 200px PNG on a poster is why people can’t scan it from a metre away. Error correction (L/M/Q/H) lets you cover a corner with a logo. H survives more damage and makes a denser code. Don’t crank H and then shrink it.
Too much text (a full vCard with a photo) makes a dense code that cheap cameras miss. Shorten the payload, don’t just enlarge the PNG. Screen-of-a-screen scans fail. Don’t photograph a QR off another monitor if you can paste the URL. This does not make a tracking link. If you need “this poster vs that poster,” use two URLs, not two colors.
Tips
- Print a test at real size and scan with a phone before a large run.
- Guest WiFi SSID + password on a QR is a feature; corporate PSK on a QR is an incident.
- Short URLs make sparse codes that survive cheap cameras.