About InfiniMii

InfiniMii archives Mii characters and provides tools for sharing, rendering, file conversion, and transfers between Nintendo systems.

What InfiniMii does

Supported systems

InfiniMii works with Miis from these Nintendo systems and services:

  • Nintendo DS
  • Nintendo Wii
  • Nintendo 3DS
  • Nintendo Wii U
  • Amiibo
  • Nintendo Switch
  • Switch 2
  • Mii Studio
  • Tomodachi Life
  • Miitomo
Read the transfer guide

File conversion

Available conversion tools include:

  • Wii ↔ 3DS/Wii U backporting
  • QR code generation
  • Binary file conversion
  • Special format variants
  • Extract Miis from and insert Miis into Amiibo files
  • Lossless conversion where possible

Mii archive

Browse:

  • Official Nintendo Miis from games
  • Community-created characters
  • Celebrity and character recreations
  • Original designs
  • The statistically Average Mii

QR code tools

Read and create compatible Mii QR codes:

  • Scan QR codes from images
  • Generate compatible QR codes
  • 3DS/Wii U workflows

Private Mii collection

Keep Miis private until you choose to publish them:

  • Store Miis privately online
  • Access from any device
  • Sync between systems
  • Family and friend Miis
  • Backup your creations

The Average Mii

The Average Mii uses the most common feature choices and placements among Miis in the database. It is recalculated as the collection changes.

View the Average Mii

Built with MiiJS

InfiniMii uses MiiJS, an open-source JavaScript library for reading and writing Mii data, alongside a renderer based on recovered LTD source code. They support:

  • Reading and writing supported Mii formats, including LTD
  • Transparent LTD previews for compatible Miis; files that use unverified data receive no generated preview
  • Reading and creating QR codes
  • Format conversion while retaining supported data
  • Creating recreation instructions
  • Using the same Mii tools in other projects

MiiJS is available on GitHub and NPM for developers who want to build their own Mii applications.

View MiiJS on GitHub

Open Source

InfiniMii and MiiJS are free and open source. Their code is available to inspect and contribute to. InfiniMii has no paid feature tiers. Google AdSense ads are optional, disabled by default, and never unlock or prioritize site features.

Disclaimer

InfiniMii is an independent fan project and is not affiliated with, endorsed by, or associated with Nintendo Co., Ltd. Nintendo, Mii, Wii, Nintendo DS, Nintendo 3DS, Wii U, Amiibo, Nintendo Switch, Switch 2, Tomodachi Life, and Miitomo are trademarks of Nintendo Co., Ltd.