"Words" has been tested on the following browser and operating system combinations:
| Browser | Operating system | Status |
| Chrome 43.0.2357.81 | Mac OSX 10.9.5 | OK |
| Chrome 42.0.2311.152 | Windows 7 | OK |
| Firefox 38.0.1 | Mac OSX 10.9.5 | OK |
| Firefox 24.8.1 | Windows 7 | Problem with overlays |
| Internet Explorer 11 | Windows 7 | |
| Internet Explorer 10.0.9200.16384 | Windows 8 | |
| Safari 7.1.6 | Mac OSX 10.9.5 | OK |
| Safari | iOS 7.0.4 |