QR Code Generator Extension for Chrome, Edge, and Firefox

Yes. The KoloQR extension is free in every store, with no account, no paid tier, no limit on how many codes you make, and no watermark on downloads. Codes you create are yours to use commercially. It stays free for the same reason the website does: the generator runs on your own device, so there is no server cost per code.

Yes. Brave, Vivaldi, and Arc install the KoloQR extension directly from the Chrome Web Store. Opera needs its "Install Chrome Extensions" add-on enabled first, after which the Chrome listing installs normally. Edge has its own listing on Microsoft Edge Add-ons, and Firefox has one on Firefox Add-ons.

No. KoloQR has no Safari extension, and Chrome on Android and iPhone does not support extensions at all. On a Mac with Safari or on any phone, open the KoloQR generator in the browser instead: it has the same styling options and export formats, and it also runs entirely on the device.

Right-click an empty part of the page and choose "Create QR code for this page", then download the PNG. Edge has the same right-click option, and Firefox has it under the tab's right-click menu, Share, then Generate QR Code. All three encode only the page address, in black and white, which is fine for opening a page on your own phone.

No. The QR code is generated inside the extension, which is why the KoloQR extension works with no internet connection. The link, Wi-Fi password, or phone number you enter is not sent to KoloQR and not stored on a server. The Firefox listing shows the only permission the add-on asks for: writing to the clipboard.

Yes. The KoloQR extension keeps a history of your codes in the browser, so you can reopen one and download it again without rebuilding it. The history lives on your device, not on a KoloQR server, so it is not synced to another computer and is lost if you remove the extension or clear its data.

No. The KoloQR extension makes static QR codes, which store the link or text inside the pattern itself, so a printed code can't be edited. That also means it never expires and depends on no subscription. If the destination may change, use a dynamic QR service - the guide on static vs dynamic QR codes covers the trade-off.

The usual causes are low contrast, a code printed too small, or a logo that covers too much of the pattern. Keep a dark code on a light background, print it at least 2 × 2 cm, and test it with a phone before printing. The contrast checker and the not-scanning guide walk through the rest.

Use the extension for quick codes while you browse: links, Wi-Fi, email, phone, SMS, and text, one click from any tab, with a history of past codes. Use the website when you need more kinds of code: it adds calendar events, map locations, and payment and crypto codes. Both draw the same four shapes, both are free, and both export the same four file formats.

You don't have to. Chrome, Edge, and Firefox install extension updates automatically in the background, usually within a few hours of a release. Each release is listed with its date on the changelog, so you can check which version you should have.