WhatsApp makes use of the UTF-8 character set and any characters within this set are supported. Being a richer messaging platform, additional formatting and media types are also supported over and above plain text. A maximum of 4096 characters can be sent at a time and messages that are longer will be truncated.
Rich text can include hyperlinks and formatting such as bold, italics, strike-through, code formatting, line breaks, and emojis.
Various media formats are also supported. These include the following popular formats:
Images – JPG, JPEG, GIF, PNG
Documents – PDF, DOC, PPT, XLS
Audio – AAC, MP4, AMR, MP3, OPUS