Mainsail - The 3D Printer Interface for Klipper | WarmIndex

Mainsail is a lightweight, responsive web interface for managing and controlling 3D printers powered by Klipper firmware, designed for 3D printing hobbyists, makers, and multi-printer farm operators.

🚀 Overview

Mainsail offers a sleek, intuitive web dashboard to control Klipper-based 3D printers, enabling real-time monitoring, file management, and customization from any device with a browser.

What problem does this project solve? Klipper is a high-performance firmware for 3D printers, but it lacks a built-in user-friendly interface—Mainsail provides a lightweight, responsive UI to make advanced printer control accessible without complexity.

Who is it built for? Individual 3D printing enthusiasts, printer farm operators managing multiple machines, and vendors pre-installing on their printers.

Why did you build it? To enhance Klipper's usability with a consistent design philosophy, focusing on responsiveness, intuitiveness, and essential features for a better printing workflow.

✨ Key Features

Fully responsive interface for desktop, tablet, and mobile devices (crucial for monitoring prints anywhere)
Printer farm support for controlling multiple printers from a single dashboard
Integrated file manager with upload, rename, delete, and in-browser editor with syntax highlighting
Live monitoring of temperatures, print progress, history, and statistics, plus 3D G-code viewer and bed mesh visualization
Webcam and multi-cam support, timelapse via moonraker-timelapse, and power device integration (relays, smart plugs)
Optional: Experimental object exclusion, customizable themes, macros with prompts, and slicer job queue

🛠 Tech Stack

Frontend: Vue.js, TypeScript, CSS, JavaScript, HTML
Backend: Moonraker API (handles Klipper communication)
Database: N/A (stateless, uses Moonraker)
Auth: Moonraker-based (typically trusted local networks)
Hosting: Self-hosted via Docker, Raspberry Pi images (MainsailOS)

👥 Who Is This For?

This project is useful for:

3D printing hobbyists running Klipper who want an easy-to-use web UI
Teams looking for multi-printer farm management and monitoring
Indie makers building custom Klipper setups or vendors shipping printers

📸 Screenshots / Demo

Live demo: https://my.mainsail.xyz/
GitHub: https://github.com/mainsail-crew/mainsail

🔥 Project Status

🟢 Actively building

Last updated: 2026-03-24

❓ FAQ

Is this project free?

Yes / Open Source (Free to use, with optional support via Patreon or GitHub Sponsors.)

Is the source code available?

Yes — https://github.com/mainsail-crew/mainsail

Can I contribute?

Yes—submit issues and pull requests on GitHub, join Discord discussions at https://discord.gg/mainsail, or help with good-first issues labeled for newcomers.