What is a QR Code Generator?
A QR code is a two-dimensional barcode that encodes text data — most often a URL — into a pattern of black and white squares that any smartphone camera can scan and decode instantly. Unlike some QR code generators that route the scanned URL through their own redirect service (so they can track scans, and which can break if the service ever shuts down), this tool encodes your data directly into the QR code itself with no intermediary, no expiry, and no tracking.
When to use it
QR codes are useful anywhere you need to bridge a physical object or space to a digital destination: printed on a business card or flyer linking to a website, on packaging linking to setup instructions, on a poster linking to an event registration form, or for quickly transferring a Wi-Fi password or contact card to a phone without typing it manually. They're also commonly used in restaurants for digital menus and in presentations to let an audience quickly open a link without typing a URL.
How it works
QR code generation follows the QR code specification (ISO/IEC 18004), which encodes your input text using one of several error-correction levels — meaning the code remains scannable even if part of it is damaged, obscured, or poorly printed, since redundant data is built into the pattern. This tool generates the code entirely client-side in your browser using a JavaScript QR encoding library, then renders it to canvas so you can download it as a PNG — your URL or text never leaves your device or gets sent to any server in the process.
Frequently asked questions
Do QR codes generated by this tool expire?
No. Because the data is encoded directly into the QR code pattern with no redirect service in between, the code will keep working for as long as the underlying URL or content it points to remains valid — there's no expiration built into the QR code itself.
What's the maximum amount of text a QR code can hold?
It depends on the QR code's version (size) and error-correction level, but a standard QR code can hold roughly up to 4,000 alphanumeric characters or about 3,000 bytes of binary data. In practice, shorter content (like a URL) produces a simpler, more reliably scannable code.
Can I use a generated QR code for commercial printing?
Yes — download the PNG at a large enough size for your print resolution. For print use, generate the code larger than you think you need (higher pixel dimensions), since scaling a small QR code up can introduce blur that hurts scannability.
Why won't my QR code scan?
The most common causes are insufficient contrast (light gray on white, for example), the code being too small relative to the scanning distance, or damage/obstruction covering one of the three corner alignment squares. Try increasing the size and testing with your phone's actual camera app before finalizing.