Mainsail review
A polished self-hosted control center for Klipper printers, not a slicer or model repair tool.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Mainsail is an open-source, self-hosted web interface for managing and controlling 3D printers running Klipper firmware. It connects through Moonraker and is designed for makers, hobbyists, and professionals who want a browser-based way to operate one or more Klipper printers. The interface brings printer control, live status, temperature monitoring, file handling, macros, G-Code viewing, webcams, and print history into one workspace. It is a strong fit for Klipper users who want a focused interface rather than a broader cloud printing service.
Its standout strength is the breadth of printer operations covered in one place. Mainsail supports multi-printer management, real-time printer-state and temperature monitoring, G-Code and configuration-file organization and editing, print history, usage statistics, macro prompts and parameters, Bed Mesh visualization, and webcam or multi-webcam monitoring. Supported power devices can also be controlled through relays and smart devices. Integration with Klipper and Moonraker forms the core ecosystem, while Cura, IdeaMaker, OrcaSlicer, and PrusaSlicer connect the interface to established slicing workflows. Crowsnest and moonraker-timelapse extend the surrounding setup.
Mainsail is intentionally narrow in scope: it manages the printer environment but does not replace a slicer or model-preparation tool. It does not provide slicing, support generation, cloud slicing, or model repair, so users need separate software for those steps. Installation can be handled through MainsailOS, Docker, manual setup, or other documented methods, making it suitable for self-hosted environments with some technical setup involved. Choose Mainsail for polished Klipper control, monitoring, and file management; choose an alternative if you need an all-in-one application for preparing and repairing 3D models.
Mainsail pros and cons
- Where it wins
- Controls and monitors multiple Klipper printers through one interface
- Combines files, macros, bed meshes, webcams, and print history
- Integrates with Cura, IdeaMaker, OrcaSlicer, and PrusaSlicer
- Where it doesn't
- Requires a Klipper and Moonraker-based printer setup
- Does not provide slicing or cloud slicing
- Does not include support generation or model repair
Mainsail fact sheet, pricing and score →
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update