Isotoxin is a multiprotocol client. toxcore is one of supported protocols. Authored by Rotkaermota.

Maintainers isotoxin
Language C++
Graphical Toolkit Rectangles (written specifically for Isotoxin)
Operating Systems Windows
Status: Inactive1)


  • Standard features like:
    • Nickname customization
    • Status customization
    • Friendlist
    • One to one conversations
    • Message history
    • Unread messages notification
  • Autoupdate
  • Audio/Video calls
  • Desktop sharing via video calls
  • File transfers
  • File transfer resuming
  • UI Themes
  • Multilangual
  • Multiprofile
  • Metacontacts
  • Avatars
  • Faux offline messaging
  • DNS discovery (tox1 and tox3)
  • Tox group chats (and audio group chats)
  • Send message create time (only Isotoxin to Isotoxin)
  • Unlimited message length (only Isotoxin to Isotoxin)
  • Emoticons
  • Inline images
  • Encrypted profile support (including message history)


Latest binary can be found here or here

Alternative i2p network address: http://isotoxin.i2p (also available via i2p inproxy:


Isotoxin written with Visual Studio 2013/2015. All sources, including toxcore, should be built by c++ compiler of Visual Studio 2013/2015. To build, follow instruction.

Other clients

The following is a list of some other Tox clients that you may be interested in using.

Popular Tox clients
qTox µTox Toxic Toxygen aTox Antidote