PrusaLink Review

PrusaLink is worth setting up if you want to send files to your Prusa and check prints from another room. On printers with it built in, it’s the first option I’d try: you get the basic controls without adding a separate computer. Its biggest drawback is how little room there is to add features, especially compared with OctoPrint’s plugins.

The recommendation is less automatic for an older MK3 or MK2.5, where PrusaLink needs extra hardware. This review covers both filament-printer setups. Prusa Connect, the separate cloud service, becomes useful when you want access away from home or a shared view of several printers.

What PrusaLink does on your network

PrusaLink gives your printer a webpage. Open its IP address—the address your router assigns it—in a browser on the same local network. From there, you can upload printing files, check progress and control a print. You don’t need an internet connection for those everyday local tasks once everything is set up.

That’s useful if your printer sits in a workshop while you prepare models at your desk. You can send the next file without carrying a memory stick back and forth. Your home network still needs to work; internet-free doesn’t mean connection-free.

Prusa Connect adds a different set of conveniences. It uses an online account to provide access away from home, print queues, production statistics and management of several printers. A queue still needs someone to remove the finished part, prepare the printer and mark it ready for another job. It doesn’t clear the print bed for you.

Connect’s cloud storage allowance also has nothing to do with how much space is available on your printer’s USB drive or a PrusaLink host’s memory card. Keep those separate when deciding where to keep files.

For one printer at home, local PrusaLink may cover everything you need. For several printers shared with other people, Connect’s common dashboard is a stronger reason to add the cloud service than basic file uploads alone.

Getting PrusaLink running on your printer

Printers with PrusaLink built in

The MK4/S, MK3.9/S, MK3.5/S, XL and CORE One/+/L have built-in PrusaLink. The MINI/+ does too, but needs its optional Wi-Fi module for wireless access; Ethernet avoids that requirement. You don’t need a Raspberry Pi for these printers.

Use current stable firmware for your exact model. PrusaLink comes with the printer firmware here, so the separate Raspberry Pi software download isn’t the update you want.

Connect Ethernet, or use the printer’s Wi-Fi wizard. The documented ESP Wi-Fi connection uses 2.4 GHz, so a network offering only 5 GHz won’t work. Setup options vary with hardware and firmware: newer menus can scan networks, while a configuration file on USB provides another route.

Find the address under Settings > Network > IPv4 Address, then open it in your browser. Look under Settings > Network > PrusaLink for the login details and check that PrusaLink is enabled. On the MK4 and XL, the default username is maker; use the password shown on the printer. This is separate from your Prusa Account.

For an XL, use the current shared setup guide; the older guide explicitly covers firmware only through 4.7.5. SL1/SL1S resin printers also have PrusaLink, but use their separate instructions and Network > Login credentials menu.

Printers that need a separate computer

For an MK3/S/+ or MK2.5/S, you can connect a supported Raspberry Pi by USB. Prusa lists Pi 3, 3+, 4 and 5 for this path. Budget for the board, its power supply, a case, cable and a Class 10 microSD card of at least 8 GB.

An MK3/S/+ can instead take a Pi Zero W or Zero 2 W through its internal GPIO pins. That requires work inside the electronics enclosure. The external USB route avoids the pin installation; the MK2.5/S uses USB.

Write the PrusaLink image to the card, configure networking, connect the host and open its address from the printer’s Support menu. For USB, the printer’s RPi port setting must be off; for GPIO, it must be on. Create browser credentials in the PrusaLink wizard, distinct from the Pi’s console login.

PrusaLink 0.8.1 requires printer firmware 3.14.0 or newer, despite the older minimum still shown in the USB guide. The wizard also documents an online serial-number check, so plan for internet access during initial setup.

Sending files and checking your prints

Start in PrusaSlicer, which turns your model into the G-code instructions the printer follows. Add a Physical printer, choose PrusaLink as the host type, and enter the printer’s address and the appropriate authentication details. The physical-printer entry saves the connection separately from your printing settings.

For MK4 and XL connections, the printer’s displayed PrusaLink password also serves as the API key—the credential software uses to connect. On a Pi installation, get the API key from PrusaLink. If you select HTTP Digest authentication instead, use the browser username and password for that installation.

After slicing, use the send button and choose whether to upload the file or upload and print. For a browser upload on the built-in version, open Storage, drag in the file, then open its details and select Start Print. Keep a USB drive inserted: network transfer replaces carrying it around, not the printer’s need for storage.

Before starting, leave a clean, empty print sheet in place and the printer on its home screen. A prompt waiting on the printer’s display can block remote commands. As an initial check, upload a small file and confirm the correct printer starts and reports progress before sending a long job.

PrusaLink lets you pause, resume and stop jobs when the printer is in a state that allows those commands. Progress and temperature information help you check whether a job is proceeding, but they don’t show whether the part has come loose. Camera support is a separate decision.

A Reddit owner described using PrusaLink for slicer uploads and progress checks while keeping OctoPrint just for its camera. That’s a useful example of splitting the jobs between tools, rather than replacing everything at once.

The convenience is fewer trips to move files. It isn’t a promise of faster printing. Upload speed depends on the connection and printer workload; Prusa specifically notes that transfers can slow while another file is printing.

Where PrusaLink can interrupt your workflow

When a job doesn’t start, first work out which connection failed. If Connect can’t reach the printer but its local PrusaLink page opens, you can check the printer there. If neither page works locally, check the printer’s current IP address and network connection. An address saved in your slicer can become outdated when your router assigns a different one.

Login problems have their own causes. Prusa recommends Chrome or Firefox in its built-in setup guide because Safari and Edge can have login trouble. Retrieve the credentials from the printer rather than repeatedly trying your cloud password. On a Pi installation, forgetting the browser credentials can mean repeating the setup wizard; save them somewhere you can find them.

There are reports of more frustrating failures. A January 2025 hands-on account described MK3S problems with a printer SD card inserted, trouble starting with an MMU2 multicolor accessory attached, and unclear errors when the connection to Connect failed. Exact software versions and causes weren’t established. Those reports warrant checking your own older-printer setup, but don’t establish a recurring fault in today’s MK4, XL or MMU3 workflows.

Software changes matter here: the Pi release notes document SD-card fixes and later MMU support improvements. That doesn’t prove every reported problem was fixed. Likewise, conflicting MK4 forum accounts from 2023 don’t establish a current speed or reliability winner.

The practical approach is to confirm uploads, starting and error recovery with your actual printer and accessories before replacing a working host. A clean dashboard alone won’t tell you whether it handles the interruption that matters to you.

What changes if you choose OctoPrint

OctoPrint makes the strongest case when you can name something you need beyond uploading and checking a print. It runs on a separate host, commonly a Raspberry Pi connected to the printer by USB. If your printer has PrusaLink built in, switching means adding that host. On an older MK3 already using a Pi, you may have the hardware you need.

Choose the board for the software. OctoPrint recommends the Pi 3B, 3B+, 4B or Zero 2. The original Zero W, supported for some PrusaLink installations, is explicitly not recommended for OctoPrint because of performance problems.

Cameras and timelapses: OctoPi, the ready-made Raspberry Pi installation, includes webcam viewing and timelapse tools. The Octolapse plugin adds carefully positioned snapshots so the finished video looks steadier. It needs a compatible printer, camera and configuration; installing it alone doesn’t guarantee a good result.

PrusaLink on a Pi can also use supported USB or ribbon-connected Pi cameras, with snapshot options documented in its releases. Built-in PrusaLink on the MK4, MK3.9 and XL doesn’t provide that camera support. Prusa Connect can have a camera assigned separately. If you want video while keeping printer control local, a separate camera setup may be enough; you don’t necessarily need to move printing to OctoPrint.

Canceling one failed object: OctoPrint’s Cancelobject plugin can stop one part while the others continue, using object labels in compatible G-code. But this isn’t exclusively an OctoPrint benefit. Supported Prusas, including the MK4 and XL, offer Cancel Object through the printer menu with suitable firmware and slicing settings. That local menu feature doesn’t establish an equivalent button in PrusaLink’s browser interface.

Plugins and automation: OctoPrint offers installable extensions and events that can trigger configured actions when printing finishes or fails. PrusaLink has an API for external software, but no comparable plugin manager. Home Assistant can monitor supported Prusas through PrusaLink; that monitoring integration isn’t a substitute for every OctoPrint automation.

Check plugin compatibility before a major OctoPrint upgrade. The move toward version 2.0 has required some plugin authors to make changes, so a feature you depend on deserves its own check.

There’s also a significant printer-side tradeoff. Prusa’s OctoPrint guide warns that crash detection, Power Panic power-loss recovery and XL multitool printing may not work through that route. Binary G-code files need an extra plugin. These limitations outweigh a nicer camera page if they disrupt the prints you bought the machine to make.

Is PrusaLink enough for your printing?

For a compatible printer with PrusaLink built in, I recommend starting there. It handles the useful everyday loop—send a file, start the job and check progress—with little additional equipment. Add Connect if you need away-from-home access or shared queues.

For an MK3 or MK2.5, choose PrusaLink when basic local control and a route into Connect justify setting up the host. If OctoPrint already runs your camera, timelapses or essential plugins, keep that working setup unless you have a clear reason to change.

On an XL, give printer compatibility more weight than extension counts. Check any proposed OctoPrint workflow against your multitool needs before switching.

PrusaLink’s appeal is simple: it removes the file-carrying chore without asking you to build an elaborate control system. Its limit is just as clear. If your must-have feature sits outside those basic tasks, choose the software or separate camera arrangement that actually supplies it.