Threema Web currently provides the following features:

• Full access to all contacts, media and chats, including past conversations
  
• Send/receive text messages, pictures and media
  
• Send/receive files (send files using drag and drop)
  
• Send/receive emoji
  
• Play animated GIFs
  
• Agree/disagree feature
  
• Add contacts
  
• Manage groups and distribution lists
  
• Set a session password