QR Code Generator
Generate a QR code for a URL, text, Wi-Fi network, contact card or email in your browser, with error correction and colours you choose, as SVG or PNG.
Free · No sign-up · Your inputs stay in your browser
Input
Generate a QR code
Output
Version 3, 29×29 modules
| Payload | https://shellhacks.dev/tools |
|---|---|
| Bytes | 28 |
| Mask | 2 |
Encoded in this browser (byte mode, the mask chosen by the standard's penalty rules), so a Wi-Fi password never goes to a QR service. Higher error correction survives more damage, or a logo pasted over the middle, at the cost of a denser code. Keep dark on light with strong contrast and the four-module quiet margin; inverted or low-contrast codes fail on many phone cameras.
Runs in this browser. Nothing you paste is sent to a server.
About this tool
Method, assumptions, practical next steps, and limits.
Wi-Fi passwords stay local
Online QR generators receive whatever you encode, including a Wi-Fi password or a private link. This one never sends the payload anywhere. The output is a crisp SVG for print and PNGs at screen and print resolution. QR codes are standardised as ISO/IEC 18004.
Making codes that scan
Keep dark modules on a light background with strong contrast, leave the four-module quiet zone around the code, and print it large enough: about 2 cm across for a short URL read at arm's length. Higher error correction (Q or H) survives scratches, or a small logo over the centre, at the cost of a denser code.
