How to Generate a QR Code

A QR code turns anything digital into something you can point a phone at. A link, a Wi-Fi password, contact details, a menu — encode it as a QR code and anyone can access it by scanning, no typing required. They are on posters, packaging, receipts, and restaurant tables everywhere. This guide explains what QR codes can hold, how to make one that scans reliably, and the pitfalls to avoid.

What a QR code can hold

A QR code is just a way of encoding data as a scannable pattern. The most common contents:

• A URL — by far the most popular; scan to open a web page.
• Wi-Fi credentials — scan to join a network without typing the password.
• Contact info (vCard) — scan to save someone's details.
• Plain text, an email address, a phone number, or a payment link.

How to generate a QR code with this tool

1. Open the QR Code Generator tool.
2. Enter the content — a URL, text, or other data.
3. Generate the code and download it as an image.

Everything runs in your browser, so whatever you encode is never uploaded.

Making a QR code that actually scans

A QR code that will not scan is useless, and there are a few reliable ways to break one:

• Keep enough contrast. Dark code on a light background scans best. Low-contrast or inverted (light on dark) codes often fail.
• Do not make it too small. Print it large enough that a phone camera can resolve the pattern — especially on posters seen from a distance.
• Leave the quiet zone. QR codes need a margin of empty space around them. Crowding the code with text or graphics right up to its edge stops scanners locking on.
• Test before you publish. Scan the finished code with a couple of phones. Discovering a broken QR code after printing a thousand flyers is a costly mistake.

The static-URL caveat

A basic QR code is *static* — the URL is baked in and cannot be changed after printing. If the link ever needs to change, the code is dead. For anything long-lived, encode a URL you control (like a short link that redirects) so you can update the destination without reprinting. Do not encode a URL you might abandon.

Related tools

To read an existing QR code rather than make one, QR Code Scanner decodes it. Shrink the generated image for the web with Compress Image, or size it precisely with Resize Image for print.

Common uses

• Link to a website from print or packaging.
• Share Wi-Fi access easily.
• Menus and signage.
• Contact cards and event check-ins.

Privacy and limits

Generation is fully local — no upload, nothing stored, offline once loaded. Open the QR Code Generator tool to create a scannable code.