Kiri:Moto

Kiri:Moto is a browser slicer for 3D printers, CNC mills, and laser cutters. It is best suited to makers, educators, and professionals who move between fabrication methods. Its broad workflow coverage and privacy-first deployment are compelling, but printer compatibility and macro handling should decide whether it fits your setup.

Overview

Kiri:Moto combines CAM, FDM, SLA, and LASER work in one application. That makes it a sensible choice for a mixed fabrication workshop, while users who only need a conventional printer slicer may find its wider scope unnecessary. Additional modes build on the LASER workflow rather than being first-class supported modes.

Native support covers OBJ, STL, and 3MF files. SVG, JPG, and PNG images can be auto-extruded into three-dimensional parts, which is useful for turning graphics into cut or printed geometry without a separate modeling step.

The maker says processing happens entirely in the browser, with no personal-data collection and no sending or storage of user data in the cloud. Browser sandboxing means the app cannot read hard-drive data without an explicit user action. Source code is released under the MIT license, and the software is described as free to use without restriction.

Key features

Fabrication and printer connections

The CAM, FDM, SLA, and LASER combination is Kiri:Moto’s defining strength. GridSpace’s OctoPrint plugin can spool jobs to printers on a local network, adding a practical route from slicing to printer control. An Onshape web-app extension loads parts from an Onshape document for slicing, helpful for teams already designing there.

The FDM engine also powers Lychee Slicer, and the slicing engine is used by SimplyPrint’s web-based printer-management system. Those relationships indicate a reusable engine, though they do not replace checking Kiri:Moto’s own device support for your hardware.

Deployment and embedding

Use it in a browser, install documented desktop Electron binaries, run it locally with Docker, or use the command-line slicing utility. An iframe messaging API supports embedding Kiri:Moto in another application, making it a candidate for custom internal tools or education platforms rather than only standalone use.

Printer compatibility and support

If your printer is unsupported, you can customize a similar device or import a PrusaSlicer INI file. Macro logic does not convert automatically, so printer owners whose workflows depend on macros should expect manual work. Documentation, Discourse forums, Discord, bug reports, and a video guide provide several support channels.

Pricing

There is no free trial because the product is already free, and no paid tier, seat charge, quota, or renewal term is stated. The free plan suits individual makers, classrooms, and professional users who can run a browser, desktop, Docker, or command-line workflow without a paid service. It gives up nothing to a cheaper tier because no cheaper tier exists, though cloud slicing is not provided.

Platforms

Kiri:Moto is available on web, Windows, macOS, Linux, self-hosted deployments, as an API, and through an extension. Browser use is the lowest-friction route; Docker and command-line options are better for controlled local or automated pipelines. Printer control is supported through the OctoPrint integration, while slicing itself is not a cloud-slicing service.

Who it's for

Choose Kiri:Moto if you are a maker, hobbyist, student, educator, or professional handling more than one fabrication process, or if you need an embeddable or self-hosted slicer. It is particularly attractive when keeping models in the browser and avoiding cloud transfer matters. It is a weaker fit for a printer whose macros are central to production, or for anyone wanting a hosted slicing backend.

Pros and cons

Pros

• Four core workflows: CAM, FDM, SLA, and LASER cover more equipment types than a printer-only slicer.
• Broad file intake: OBJ, STL, and 3MF import, plus image auto-extrusion, reduce conversion steps.
• Privacy-oriented operation: Browser processing, no personal-data collection, and no cloud storage of user data keep jobs local.
• Flexible deployment: Web, Electron, Docker, command line, iframe API, and Onshape integration fit varied technical environments.
• Open licensing: MIT-licensed source and unrestricted-use terms support inspection and adaptation.

Cons

• Printer setup may require work: Unsupported devices need a similar-device customization or PrusaSlicer INI import.
• Macros do not translate automatically: Macro-heavy printer workflows can demand manual rebuilding.
• Not every mode is first-class: Some LASER extensions are outside the primary supported mode set.
• No cloud slicing: Teams seeking a hosted processing service need another tool or their own deployment.

Alternatives

PrusaSlicer is the better pick for a free, open-source slicer focused on established 3D-printing workflows across desktop and web platforms.

OctoPrint suits users who primarily need free, open-source printer management and local control rather than Kiri:Moto’s multi-process slicing.

UltiMaker Cura is an alternative free, open-source desktop slicer when Linux, macOS, web, or Windows printer slicing is the priority.

Bambu Studio is appropriate for users wanting free slicing for Linux, macOS, or Windows with optional networking and SD-card printing.

CHITUBOX is the alternative to consider for a dedicated 3D-printing slicer with a free Basic edition and optional paid Dental plans.

AstroPrint fits users who prefer a freemium, multi-platform printer service with a free tier covering two printers, one user, and 1GB of storage.

Polar Cloud is better for a hosted freemium workflow whose free tier limits usage to one printer, five print jobs per month, and 300MB of storage.

SimplyPrint suits managed printer fleets needing a free tier for up to two printers plus 15 cloud slices per month and 12 AI Failure Detection hours.

See more options in 3D Printing Software and 3D Slicer Software.

Verdict

Kiri:Moto is a strong choice for users who want one free, privacy-conscious tool spanning several fabrication methods, with deployment options that extend from a browser to self-hosted automation. Choose it for that breadth and flexibility; look elsewhere if your printer depends on automatic macro conversion or if you require cloud slicing.