This extension can generate QR codes from the URL, selected text or links of the current website. You can find this extension in the Chrome Web Store.
On startup QRCoder generates a QR code for the current website URL. You can trigger this manually by clicking the home button 
in the toolbar or with the keyboard shortcut ALT+H.
QRCoder can generate QR codes for selected text of the current website. QR code generation is trigged only by text selection changes. You can (de-)activate this behavior by clicking the text selection button 
in the toolbar or with the keyboard shortcut ALT+T.
QRCoder can generate QR codes for link URLs when you hover over them with your mouse. You can (de-)activate this behavior by clicking the link button 
in the toolbar or with the keyboard shortcut ALT+U.
You can (un-)lock the current QR code by clicking the lock button 
in the toolbar or with the keyboard shortcut ALT+L. Locking prevents QR code generation by changing the selected text or hovering over links.
You can change the QR code position by hitting SHIFT and an arrow key on your keyboard. The following 9 positions (also accessible by keyboard shortcuts) are possible:
| position | vertical | horizontal | Keyboard Shortcut |
|---|---|---|---|
| 1 | top | left | ALT + 1 |
| 2 | top | center | ALT + 2 |
| 3 | top | right | ALT + 3 |
| 4 | middle | left | ALT + 4 |
| 5 | middle | center | ALT + 5 |
| 6 | middle | right | ALT + 6 |
| 7 | bottom | left | ALT + 7 |
| 8 | bottom | center | ALT + 8 |
| 9 | bottom | right | ALT + 9 |
The fullsize button 
in the toolbar (or the keyboard shortcut ALT+F) generates a full sized QR code. You can exit the fullsize view by hitting the ESCAPE key or by clicking the fullsize button or by hitting ALT+F again.
Below the generated QR code you can find a statusbar which shows the current QR code source ( = current website URL, = selected text, = hovered link url) and value (maybe truncated).
The QR code generation part of this extension uses QRCode.js by davidshimjs.
This project is under MIT License.