Mainsail
Mainsail is a web interface for managing and controlling Klipper-powered 3D printers.
What Mainsail is
Mainsail is a web interface for managing and controlling Klipper-powered 3D printers. It works as the front end with Moonraker supplying the API and Klipper controlling the printer, so both are required. One interface can manage multiple printers and show live temperatures, print progress, and printer state. Browser tools handle G-Code and configuration files, configurable macros, print history and statistics, Bed Mesh diagnostics, and G-Code visualization. Dashboard cards, navigation, logos, backgrounds, and CSS themes are customizable. Mainsail supports webcams, timelapses, relays, and supported smart power devices. Documented slicer integrations include Cura, IdeaMaker, OrcaSlicer, and PrusaSlicer, with configuration for direct G-Code uploads. Installation options are MainsailOS, KIAUH, or manual setup. MainsailOS bundles Mainsail, Moonraker, Klipper, Crowsnest, Sonar, and a timelapse plugin. The project is open source and free.
Good
- Controls multiple Klipper printers
- Live temperatures and print progress
- Browser G-Code management
- Webcam and timelapse support
- Custom dashboards and themes
Watch out
- Requires Klipper and Moonraker
- No cloud slicing
- No model repair
- Hosted demo needs existing printer software
Who it suits
Mainsail suits users running Klipper printers who want browser-based monitoring and control across one or multiple machines. It also fits setups needing slicer workflows, camera monitoring, and configurable dashboards.
Verdict
Mainsail provides broad browser control for Klipper environments, from files and macros to monitoring and cameras. Installation requires the Klipper and Moonraker architecture, so it is intended for compatible printer setups rather than standalone use.
Plans and prices
From Mainsail's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Mainsail | Free | Open-source project; requires Klipper and Moonraker to operate |
The facts
Each one read from Mainsail's own pages, with the date it was checked.
What it does
- Architecture
- Mainsail is a front-end that works with Moonraker, which provides the API, and Klipper, which controls the printer.checked 8 Oct 2026
- Cameras and power
- Mainsail supports webcam monitoring, timelapses, and control of relays and supported smart power devices.checked 8 Oct 2026
- Customization
- Users can rearrange dashboard cards and navigation, and customize themes with logos, backgrounds, and custom CSS.checked 9 Oct 2026
- Deployment options
- Installation options include MainsailOS, KIAUH, manual installation, and a hosted demo intended for testing and exploration.checked 9 Oct 2026
- Hosted demo limit
- The hosted demo is intended for testing and exploration and requires Klipper and Moonraker to already be installed to connect to a printer.checked 8 Oct 2026
- Installation
- The recommended setup is MainsailOS, a prebuilt image that includes Mainsail, Moonraker, Klipper, and dependencies; KIAUH and manual installation are also documented.checked 8 Oct 2026
- Installation requirements
- Mainsail is the frontend and requires Klipper firmware and Moonraker, which acts as its API server, to work.checked 9 Oct 2026
- Integrations
- Mainsail supports slicer workflows and documents Cura, IdeaMaker, OrcaSlicer, and PrusaSlicer integrations.checked 9 Oct 2026
- Live controls
- The Moonraker-based interface provides real-time printer control and monitoring of temperatures, progress, and printer state.checked 9 Oct 2026
- Maintainers
- Mainsail describes itself as an open-source project maintained by meteyou and a community.checked 8 Oct 2026
- Multiple printers
- One Mainsail interface can control and monitor multiple printers.checked 9 Oct 2026
- Printer management
- The interface can manage multiple printers and show live temperatures, print progress, and printer state.checked 8 Oct 2026
- Print tools
- Features include print history and statistics, bed mesh and G-code visualization, temperature presets, and object exclusion during a print.checked 9 Oct 2026
- Privacy
- The documentation says Mainsail runs locally in the browser, communicates directly with the printer through Moonraker, and does not use telemetry or transfer data externally.checked 9 Oct 2026
- Product
- Mainsail is a web interface for managing and controlling 3D printers powered by Klipper firmware.checked 8 Oct 2026
- Purpose
- Mainsail is a web interface for managing and controlling 3D printers powered by Klipper firmware.checked 9 Oct 2026
- Slicer integrations
- The documented supported slicers are Cura, IdeaMaker, OrcaSlicer, and PrusaSlicer; configuration enables direct G-Code uploads and other features.checked 8 Oct 2026
- Support
- The project lists Discord as its primary community support channel, GitHub Discussions as an alternative, and Reddit as community-driven help that is not officially supported.checked 9 Oct 2026
- Support limits
- The Mainsail-Crew says its members work voluntarily in their free time and responses may take longer depending on the user’s time zone.checked 9 Oct 2026
- Visualization
- Mainsail includes Bed Mesh and G-Code Viewer tools for print diagnostics.checked 8 Oct 2026
Where it runs
- Files and macros
- Users can manage G-code and configuration files in the browser and organize and run macros with prompts and parameters.checked 9 Oct 2026
- MainsailOS
- MainsailOS is a prebuilt image for supported single-board computers that includes Mainsail, Moonraker, Klipper, Crowsnest, Sonar, and a timelapse plugin.checked 9 Oct 2026
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