🔲 QR Code Generator
Enter a URL or any text to instantly generate a QR code you can download as an image.
📖 How to Use
- Enter a URL or text in the box — paste a link (e.g. https://example.com) or type anything you want to encode: Wi-Fi details, contact info, event links, and so on.
- The QR code image updates automatically as you type — no button required.
- Pick an image size from the dropdown: 200×200, 300×300, or 500×500 pixels. Larger sizes scan more reliably from a distance or when printed.
- Download the image by clicking "Download QR Code" to save it as a PNG. If the download button doesn't work, right-click the QR code image and choose "Save image as" instead.
📖 Deep Dive: How Does a QR Code Actually Work?
What's actually encoded inside a QR code?
A QR Code (Quick Response Code) is simply a way of turning text into a black-and-white grid pattern. When a scanner reads the pattern, it decodes it straight back into the original text — that's the entire mechanism. It isn't a picture and it isn't a key that unlocks a database somewhere; the pattern itself literally *is* the content you typed. That's why this tool regenerates the image instantly as you type: every different string of characters produces a genuinely different grid. QR codes can hold URLs, plain text, phone numbers, or even a specially-formatted Wi-Fi connection string (e.g. WIFI:T:WPA;S:NetworkName;P:password;;) that a scanning app recognizes and offers to join automatically.
Common misuses
The most common mistake is treating a QR code as a secure way to transmit information. People sometimes encode Wi-Fi passwords, event registration details, or even bank account numbers into a QR code and post it somewhere public, forgetting that anyone with a phone camera can scan it and read the plain content instantly — QR codes have no built-in encryption, so scanning it is equivalent to reading the text directly. Another frequent issue is encoding an extremely long URL (think tracking parameters stacked on top of each other), which produces a dense, hard-to-focus-on pattern that struggles to scan in low light or from a distance. Shortening the link first with a URL shortener produces a much cleaner, more reliable code.
Error correction levels (not exposed in this tool, but useful to know)
The official QR code spec defines four error-correction levels (L/M/Q/H). Higher levels let a scanner still read the full content even if part of the pattern is smudged, damaged, or covered by a logo — at the cost of a denser pattern. The third-party service this tool calls applies a fixed correction level automatically, which works fine for typical URLs and short text. If you need a custom correction level or want to embed a logo in the middle of the code, you'll need a dedicated QR design tool.
Worked example: how big does an encoded URL get?
Take https://example.com — 23 characters — and the resulting QR code lands around "version 2" (a 25×25 grid), which already looks fairly dense to the eye. Push that to a 100+ character URL and the grid jumps to 33×33 or larger, making the pattern noticeably harder to print small or scan from a distance. That's the practical reasoning behind the rule of thumb: shorter input, easier scan.
❓ FAQ
Does what I type get seen by anyone else?
Yes, it travels over the network. This tool calls a third-party service (api.qrserver.com) to generate the QR image in real time, so whatever text or URL you enter is sent to that service's server in exchange for the image — it is not computed locally in your browser. Because of this, avoid generating QR codes for passwords, ID numbers, or other sensitive information here.
How much text can a QR code hold?
Technically up to a few thousand characters, but more characters means a denser pattern that's harder for a phone camera to focus on and read from a distance or in poor lighting. Keep it under roughly 100 characters, and shorten long URLs first.
Why doesn't the image update the instant I type?
The text box triggers regeneration on every keystroke, so it should normally update immediately. If it doesn't, the third-party image request is likely just loading slowly over the network — wait a moment or check your connection.
Can I use this to generate a Wi-Fi sharing QR code?
Yes, but you need to type the correctly formatted string yourself, e.g. WIFI:T:WPA;S:YourNetworkName;P:YourPassword;; — this tool won't assemble that format for you. Keep in mind that because the content is sent to a third-party service to render the image, your Wi-Fi password would leave the browser and travel to an external server. If privacy matters here, use your phone's built-in "Share Wi-Fi" feature instead.
The download button isn't working — what now?
Downloading works by fetching the image via the browser and saving it, so if a browser extension or network policy blocks the cross-origin request, it can fail. The simplest fallback is to right-click the QR code image directly on the page and choose "Save image as."