Polar Cloud for Prusa 3D Printers
The MK3.5 and newer, including the MK4, XL, and Core One family, plus the MINI, connect to Polar Cloud with the free Polar3D Bridge. The MK3 and older connect through the Polar Cloud plugin for OctoPrint. Either way, your Prusas join the same queues and classes as the rest of your printers.
Connect Your Prusa Printer
Before you start, have your Polar Cloud Username (the email you sign in with) and PIN handy. Both are in your Account Settings after you sign in.
MK3.5 and newer, and MINI (Polar3D Bridge)
For the Core One, Core One+, Core One L, XL, MK4S, MK4, MK3.5S, MK3.5, MINI, and MINI+. The MINI connects over Ethernet.
- Download and install the free Polar3D Bridge on any Mac, Windows, or Linux computer on the same network as your printer.
- Add your printer in the Bridge and link it to your Polar Cloud account.
- Your printer appears in your Polar Cloud dashboard, ready to slice, print, and monitor.
MK3 and older (OctoPrint plugin)
For the MK3S+, MK3S, MK3, and MK2 family, running OctoPrint.
- Install the Polar Cloud plugin from the OctoPrint plugin repository.
- Enter your Username and PIN in the plugin settings and turn the connection on.
Supported Prusa Models
| Model | Connects via |
|---|---|
| Core One | Polar3D Bridge |
| Core One+ | Polar3D Bridge |
| Core One L | Polar3D Bridge |
| XL | Polar3D Bridge |
| MK4S | Polar3D Bridge |
| MK4 | Polar3D Bridge |
| MK3.5S | Polar3D Bridge |
| MK3.5 | Polar3D Bridge |
| Mini+ | Polar3D Bridge |
| Mini | Polar3D Bridge |
| MK3S+ | OctoPrint plugin |
| MK3S | OctoPrint plugin |
| MK3 | OctoPrint plugin |
| MK2.5S | OctoPrint plugin |
| MK2.5 | OctoPrint plugin |
| MK2S | OctoPrint plugin |
| MK2 | OctoPrint plugin |
Don't see your printer? Check every way to connect or ask us.
What You Can Do Once It's Connected
Slice in the Browser
Slice from a Chromebook, iPad, or laptop, or let Polar Print pick the settings and supports in one click.
Monitor From Anywhere
Check temperatures and progress from the web or the mobile app, and pause or cancel a failed print before it wastes filament.
Generate Models With AI
Turn a text prompt or a photo into a print-ready STL, then send it straight to your Prusa.
Run a Classroom or Fleet
Shared queues, print approval, and class rosters across every printer you own, any brand.
Your Fleet. Your Data.
Your Prusa printers connect to Polar Cloud, so your workflow doesn't hinge on any one manufacturer's cloud.
Stored in the United States
Polar Cloud is built by a US company, and your data is stored in the United States on AWS infrastructure.
Your Content Stays Yours
You own what you upload. Export your data or request a full deletion at any time.
One Account, Every Brand
A single Polar Cloud account runs every printer you own, so your Prusa printers sit right next to everything else.
Details on security, uptime, and compliance are in the Trust Center.
Prusa + Polar Cloud FAQ
- Which Prusa printers work with Polar Cloud?
- The MK3.5 and newer, including the MK4, MK4S, XL, and Core One family, plus the MINI and MINI+, connect through the free Polar3D Bridge. The MK3S+, MK3S, MK3, and older connect through the OctoPrint plugin.
- Is Polar Cloud free?
- Yes. The Hobbyist tier is free forever for single users. Schools use the Education tier for student privacy, rosters, and shared queues. See pricing.