Mii Renderer (REAL)

You may like these other Mii creations. If you want me to shout out another project, ask me and I will add it if I think it's cool.

Mii Creator by kat21 - web app that lets you create, import, edit, and even make full body renders with poses. Best non-console Mii editor right now.
- Open source, made with my own FFL.js library for rendering Miis in Three.js with shaders. Development is far more active, feel free to help them out!
- You can consider it a successor to my tool if you want, since I've mostly stopped adding to it by now (that doesn't mean I'm done with Miis though). I hope you enjoy using Mii Creator.
- Note: As of March 2025, the site requires mandatory membership of their Discord server: https://discord.gg/ETqBGJ7b4j
My JSFiddles - Yes, a bit of self-promotion, but notably I wrote snippets for: converting Tomodachi Collection DS Mii data, rendering Mii glTFs with shaders in three.js, en/decoding Mii QRs with game extra data, Mii to Studio format converter in JS without a server, a Switch Mii color reference... I occasionally add more too.

See Even More Resources

Sorry if I didn't put your favorite tool above, I didn't want to add an endless amount to scroll through. I'm prioritizing what I think is coolest and most recent. Here is more to explore:

FFLResource.py extractor - Originally by Abood, this tool exports and import shapes and textures from FFL resources, and my fork can also do AFL/Miitomo resources. If you currently use mii-assets by jaames, stop, and use this - This script labels and extracts all resource data (vtx normals, transforms, deswizzling) unlike mii-assets.
PF2M Mii Renderer - You probably already know about this, but it uses the Mii Studio API that may provide a little bit more accuracy (until I get my stuff together and fix body model/scaling), and it doesn't need self-hosting. I won't blame you if you prefer this at all!
- Resources to interface with Mii Studio: mii-js by Jon Pretendo (TypeScript), mii2studio (Python), my Kaitai-based conversion code on this site (JavaScript again), my 3DS->Studio implementation and WiiLink's Studio conversion (both in Go)
- Note that my API is (mostly) compatible with Mii Studio as well.
My Avatar Editor (WiiLink archive) - Old Wii-era Flash Mii editor. If it works, it works, right? The .mae files it exports are compatible with this site (same as .rcd)
HEYimHeroic's Mii Library and MiiDataFiles - Resources for Miis in various consoles, games, etc., in many formats.
WiiLink CMOC Viewer - Browser for their Check Mii Out Channel revival, with thousands of Miis to explore and download.
- At some point I tried to add this to my site, implemented an API for this, and gave up. Anyone want to implement it for me????
MiiPort - Lets you import and export Miis from a homebrewed Switch.
- The code is the best source currently for Switch, 3DS/Wii U Mii structures and Switch color conversion tables.
MiiInfoEditorCTR - Can edit fields in your 3DS/Wii U Mii data.
- Other tools by Kazuki: Mii-Importer, Mii-Dumper for 3DS databases.
Mii Blender resources: Mii2U Blender Mii Maker, pvr-model-extractor by jaames/PicelBoi fork, Yodakiller3000 Miitomo rip tutorial
- Note that I haven't used most of these. I just hope they will be helpful.
(09/17/25) Also, I am not on Scratch. Apparently someone is impersonating me. What about me is impersonate-able? And why do you think I would want to do block coding on Scratch 😭 But, rest assured, my osu! account is 100% real.

Accuracy Status/Known Flaws

Current goals are to perfectly reproduce Wii U Mii Maker/NNID renders, Mii Studio/Miitomo renders, and Switch icon renders.

❌ Body scaling is applied to Wii U/Switch bodies but not Miitomo/Mii Studio body models
- Arms will not "separate" as much as they're supposed to with height, and the hands are not perfect spheres when stretched.
- Solving this for the Miitomo/Mii Studio body model is a matter of porting its skeleton which is TBD.

🚩 Missing a few parameters to be fully compatible with the Mii Studio API (read more...)

Note: Camera rotation lighting is inaccurate, and both rotations have slightly different ways of combining.???
- Our character rotation is pretty much as accurate in terms of lighting, but camera rotation isn't.
- Legitimately not sure why that is. Camera rotation rotates the view matrix and character rotation moves the model matrix, so, don't know.
- If you use multiple rotation axises, with our camera rotation it matches Mii Studio's character rotation, and combining axises with our character rotation matches Mii Studio's camera rotation...??????????? I can't wrap my head around all of this...
lightXDirection, lightYDirection, lightZDirection, lightDirectionMode(??)
- I attempted to implement these (with an exception to not apply if all params are 0), but...
- I actually don't know exactly how it's calculated, some math is being done to turn the degrees into a vector of sorts that is not being done by me, so it doesn't apply one-to-one for any shader.
- There's also lightDirectionMode, which cdn-mii 2.0.0/Mii Studio completely ignore. We don't know what its options do and, while setting it to "none" (the sites above were also doing this so eh where's the blame supposed to go) is SUPPOSED to not make the light directions apply, well, they do.
- Was light direction even a thing on cdn-mii 1.0.0...??? I feel like pf2m.com/tools/mii specifically said it only worked on 2.0.0.
If you find anything else I should implement from cdn-mii/Mii Studio (other than Miitomo clothing/headgear), ping me.

Planned Items/Issues: click to expand

❔Poses from Wii U and Switch are fully doable, but I haven't gotten around to adding them.
- I'm pretty sure the camera positions are in JpgPoseCam.bfres, but Switch Toolbox cannot open it, so... not sure what I'm going to do about that.
- Other than that, I experimented with this a while ago got it working with one pose. So it just needs more work.
❔Miitomo QR codes are planned as soon as Kaerutomo properly implements them. Miitopia QR codes just need to be reverse engineered.
- To be clear, this is not referring to being able to merely scan their codes, but rather make use of the extra game-specific data within.
- ... For example, applying the custom colors (hair color, etc.) within, displaying their voice or personality traits...
  - In the case of Miitomo, this means extracting the "nx_mii_core_data" Switch data that QR codes are supposed to give you, for the wider colors.
- I actually did find the AES key and was able to make an encoder/decoder for the extra data within these codes for all of those games, check it out: https://jsfiddle.net/arian_/ckya346z/12/
- For Tomodachi Life and Miitopia, all of the data is within the code and just needs to be reversed.
- In fact, Tomodachi Life codes are now implemented and show custom hair colors. But for Miitomo, it's more complicated, and sadly existing codes won't work, because:
- It looks like the only thing Miitomo stores in the QR code is some sort of ID ("token_for_json_data") - it expects the server to store the extra data with this ID and will use it to retrieve that data back from the server.
  - ... Except that this value is constant on Miitomo for some reason, meaning Nintendo probably used the CreateID/AuthorID fields instead. However the value is arbitrary.
- Problem is, Kaerutomo does not store or retrieve this data for you. At all. And since it's not open source, nobody can add it except for them, and they aren't interested. 😐
- (If you are a Kaeru dev reading this, PLEEEASEEEE get in touch!!! 😭)

❔Replicating 3DS and Wii renders has been considered but isn't a priority.

As of January 2025, there's now a script in the FFL repo that can help import 3DS meshes into FFL. (Not for Wii/RFL which has very slightly more triangles but IMO doesn't matter)
I have used a combination of this and modifications to the FFL shader to attempt a look similar to 3DS, but it's not perfect yet.
If I put more time into it the look can definitely be matched, it's just that I haven't spent much time on it. Even then it probably isn't that practical to port the exact shader so, it may always look wrong like that.

❔Miitomo/Tomodachi Life clothing/headgear/wigs may be planned.
- Don't expect any of these any time soon, especially clothing.
- Do keep in mind that these body models are different from the Wii U/Switch models and therefore the clothing may not work on those.

Unplanned:

Custom hairstyles or frankly custom anything
Miitopia makeup, or custom expressions (sorry)
- Miitomo expressions are the only exception, since they're built into AFL (its version of FFL).
BoTW/TOTK models, or "semi-Miis"
Xbox Miis, Apple Miis, Samsung Miis, any other stupid bootleg Miis
- Never ask me for these 🤬

Mii Renderer (REAL)

😭 JavaScript Error!! 😭

🕰 Miis from NNIDs come from an archive made on April 7, 2024 and updated on April 17, 2025.

How are character and camera rotation different?

Outputs

Samples & Comparisons

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Other Mii Resources

See Even More Resources

Accuracy Status/Known Flaws

Planned Items/Issues: click to expand

Unplanned:

Credits

For client-side site:

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