If you have a Chromebook that supports Android apps, in my case, the Pixel Slate that I am writing this on, you can install the app.
Open up Play Store, search for WhatsApp and install it.
If You Cannot Install WhatsApp App
Now, what happens if you cannot install the WhatsApp app on your Chromebook? You might find workarounds like downloading an APK and sideloading it. However, I will not recommend any of that.
If you already have a phone where WhatsApp is installed and works, the best way to use WhatsApp on your Chromebook, or any laptop for that matter, is WhatsApp web. I am sure this will suffice for 99% of the use cases. Most of you just want to use WhatsApp on your Chromebook also. Your primary device will remain your phone itself.
For this use, you can install WhatsApp Web as a Progressive Web App (PWA). Here is how you can do it.
Head over to https://web.whatsapp.com/. If you haven’t already paired your phone with WhatsApp Web, follow the instructions here to do this. Here is a video showing how to do this:
Next, click the settings icon (three dots menu) and choose More tools. From here, choose Create shortcut.
You will now a confirmation popup. On this screen, select “Open as a window” and then click Create. You can also give the app a different name if you wish to.
You will now see WhatsApp as a separate app window.
One last but optional step. If you want to pin this app to your taskbar for easy access, you can do that too. While the app is open, right-click the WhatsApp icon on the taskbar. Choose Pin.
You can now use WhatsApp from your Chromebook. This is applicable to Google Chrome on Windows or Mac too. The only catch here is, your phone with WhatsApp should be online for you to use WhatsApp web.
Questions? Drop me a comment!