Mainsail
Web interface for controlling Klipper-based 3D printers
2.2k stars 587 forks last commit first released GPL-3.0
Actively maintained
Last commit 21 Aug 2026.
Mainsail is a lightweight, responsive web interface for managing and controlling 3D printers running Klipper, typically via the Moonraker API. It provides real-time monitoring, job control, and configuration/file management in a browser-first experience.
Key Features
- Responsive UI optimized for desktop, tablet, and mobile
- Multi-printer “printer farm” management
- File manager for G-code and configuration files (upload, rename, delete)
- In-browser file editor with syntax highlighting for configs and G-code
- Print history and usage statistics
- Job queue for managing multiple print jobs
- G-code viewer with 3D visualization and progress tracking
- Bed mesh visualization (3D mesh graph)
- Multi-webcam viewing and monitoring
- Power device control (e.g., relays and supported smart plugs)
- Macro management and a configurable dashboard
- Localization and theming support (including custom CSS)
Use Cases
- Daily web-based control and monitoring of a single Klipper printer
- Managing a small printer farm with centralized status and workflows
- Reviewing past prints, tuning macros, and editing configuration remotely
Mainsail is a strong choice for Klipper users who want a clean, fast UI with practical operational features like file editing, visualization tools, and multi-device access.
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