PrusaSlicer, in your browser. Slice from any device — no VNC client, no local install.
This runs the full PrusaSlicer desktop app inside a single container and streams it to your browser over Selkies (WebRTC), so the 3D plate stays smooth to rotate, zoom and drag — the part of slicing where the old noVNC containers feel laggy.

Table of Contents

1. What is this?
2. Screenshots
3. Why Selkies?
4. Install on Unraid
5. Configuration
6. First use
7. How it works
8. Credits

1. What is this?

An own-image container that packages PrusaSlicer — the FDM/SLA slicer from Prusa Research — on top of LinuxServer.io's baseimage-selkies and serves its desktop UI straight to your browser. No X client, no VNC viewer, no separate install on your workstation: open the WebUI and slice.

LinuxServer ship OrcaSlicer and Cura on Selkies, but not PrusaSlicer, and the only other browser-based PrusaSlicer images are years-old, abandoned noVNC builds. This is a maintained, modern Selkies (WebRTC) build for amd64 and arm64.

PrusaSlicer itself is installed from Debian trixie's prusa-slicer package (PrusaSlicer no longer ships a Linux AppImage), so it tracks Debian's security updates and works natively on both architectures.

2. Screenshots

The plater — place and arrange models on the 3D build plate, right in your browser over Selkies.

Sliced preview — colour-coded toolpaths, a per-feature breakdown and the print-time / filament estimate, then export the G-code.

3. Why Selkies?

Slicing is a 3D-viewport workflow: you rotate the plate, zoom into overhangs, drag and orient models, and scrub the layer/tool-path preview. Over the older noVNC stack that continuous canvas feels laggy because the whole frame is re-encoded on every change. Selkies streams the desktop over WebRTC, the same reason LinuxServer moved Orca, Cura, Blender and FreeCAD onto it — so the plate stays responsive. When the host has a GPU the base wires it through; without one it falls back to software rendering so it still works.

4. Install on Unraid

Requires Unraid 6.12+. Install via Community Applications — search for PrusaSlicer (look for the junkerderprovinz maintainer). Or add the template repository manually under Docker → Add Container → Template repositories:

https://github.com/junkerderprovinz/unraid-apps

Then open the WebUI on the mapped HTTPS port (default 3001).

5. Configuration

Mount your models/G-code folder to /storage (the Unraid template defaults it to /mnt/user, giving access to all shares) so imports and slices land on your array. PrusaSlicer's own configuration (printer/filament/print profiles) persists under /config.

[!NOTE] The WebUI has no login by default for trusted-LAN use. Never expose it directly to the internet — put it behind a VPN or a reverse proxy that adds authentication, or set CUSTOM_USER + PASSWORD to enable the built-in basic auth.

6. First use

1. Open the WebUI — PrusaSlicer starts maximised, ready to slice.
2. Run the Configuration Assistant (first launch) and pick your printer(s) and filament(s).
3. Import a model (File → Import, or drag it onto the plate from your mounted folder), slice, and export the G-code to your mounted output folder.
4. Prefer a dark UI? PrusaSlicer has its own Dark mode under Preferences → General → Dark mode; the container's GTK chrome is already dark.

Closing the PrusaSlicer window simply reopens a fresh instance — it is the container's single app (kiosk model), so there is nothing else to manage.

7. How it works

Browser ──WebRTC (Selkies)──> PrusaSlicer container
                              ├─ nginx (Selkies WebUI, HTTPS :3001)
                              ├─ openbox + Selkies desktop
                              └─ /usr/bin/prusa-slicer  (Debian trixie package)
                                 └─ /config  (printer/filament/print profiles, persisted)

Built on ghcr.io/linuxserver/baseimage-selkies:debiantrixie. A small s6 overlay seeds the openbox autostart (which launches PrusaSlicer as the session's single app), keeps the WebUI login-free unless you set credentials, and prints a PRUSASLICER IS READY banner to the container log once the WebUI is serving. Images are built natively per architecture, boot-smoke tested (the binary is present and the WebUI answers) before publishing, and scanned for CVEs.

8. Credits

• PrusaSlicer by Prusa Research (AGPL-3.0) — the slicer this image packages. Installed from the Debian prusa-slicer package. This project is not affiliated with or endorsed by Prusa Research.
• LinuxServer.io baseimage-selkies (GPL-3.0) — the Selkies web-desktop base.
• Selkies — the WebRTC desktop streaming stack.

See NOTICE for the full bundled-software license list. This repository's own wrapper (Dockerfile, rootfs, scripts, artwork) is MIT — see LICENSE.

If this saved you a slicer setup, consider buying me a coffee:

_{Part of a family of self-hosted Unraid apps + plugins by junkerderprovinz — see them all at github.com/junkerderprovinz, or install from Community Applications.}