Create QR Codes for Any Content
QR codes are two-dimensional barcodes that smartphones and cameras can scan to instantly open a URL, connect to Wi-Fi, compose an email, dial a phone number, or read a block of text. This generator creates QR codes entirely in your browser — no server, no tracking, no expiration. The code is yours to download, print, and use anywhere.
Supported Content Types
The most common use is encoding a URL so that scanning opens a website. But QR codes support structured formats: Wi-Fi credentials that let a phone auto-connect, mailto links that open an email composer with a pre-filled address and subject, tel links that dial a number, and SMS links that open a messaging app. The presets build the correct format string automatically — you just fill in the fields.
Choosing the Right Size
QR codes work by contrast between dark and light modules. On screen, 200–300 pixels is sufficient for most content. For print, the physical size matters more than pixel count: a QR code should be at least 2 cm (0.8 inches) on a side for reliable scanning at arm's length, and larger if it will be scanned from a distance — a poster needs a bigger code than a business card. More data means more modules and a denser pattern, so longer URLs need larger codes.
Color and Contrast
The default black-on-white produces the most reliable scans. You can use brand colors as long as the contrast ratio stays high — a dark foreground on a light background. Inverted codes (light modules on dark background) work on modern phones but may fail on older readers. Avoid low-contrast combinations like yellow on white or dark blue on black. The finder patterns (the three large squares in the corners) must remain clearly visible.
How QR Codes Store Data
Data is encoded as a grid of dark and light modules using Reed-Solomon error correction, which means part of the code can be obscured or damaged and the content is still recoverable. The error correction level controls the tradeoff: Low (L) corrects up to 7% damage for the smallest code, Medium (M) corrects 15%, and High (H) corrects 30% at the cost of a denser pattern. This built-in redundancy is why QR codes work even when printed on curved surfaces or partially covered.
Privacy and Ownership
Many QR code services route scans through their servers for analytics, which means they control the destination and can change or disable the link. This generator encodes data directly into the image — no intermediary, no tracking, no expiration. The QR code works as long as the content it points to exists. For URL shortening or scan analytics, use a dedicated link shortener before encoding the shortened URL.