Creating custom GIFs in WhatsApp on iPhone/Android
Open the WhatsApp messenger on your mobile. It can be found on your home screen or in your App folder.
Scroll to the chat you want to send the GIF to. Tap on the chat to open the conversation.
Tap on the Attachment icon, which will open the attachment options in a new pop-up.
Select the Photo Library from the pop-up menu. It will open your phone’s photo gallery. Before then you have to put the Gifs file into your mobile photo library.
Look for the Image you want to convert to GIF and tap on it. Or WhatsApp already know the file and no need to convert. To send the GIF, simply tap the send icon.