The WhatsApp software lets users share multimedia content, but you can't send files directly to other users.
If you wanted to send unsupported file formats like .apk, .zip etc, you had to rename the file to a supported file format.
For example, if you wanted to send the apk for your favorite app, you’d rename it such that it ends with .txt. I tested with Whatsapp™ For PC extension - Opera add-ons and works great.
I send a document file (.doc) with an approximate size of 5 Mb, without any interruption of the connection and a fluid transfer to the application.
You need to know also, there’s a limit of 100 MB to any attachment.
The executable file is not allowed ( like: .exe, .dll).
Meanwhile, messaging app Telegram is still leading the pack when it comes to file size restrictions — it has supported 1.5 GB files since its launch.