OrcaSlicer

OrcaSlicer is a free, open-source slicer for FDM 3D printers: it takes your 3D model and turns it into the G-code instructions your printer follows. It started as a fork of Bambu Studio by SoftFever and has grown into the community's favorite way to drive printers from Bambu Lab, Prusa, Creality, Voron, RatRig, VzBot and dozens of other brands. The current stable release is 2.4.2, published on July 7, 2026, with a 2.5.0 beta already in testing.

What makes people switch is the combination of polish and control. The interface will feel familiar to anyone coming from PrusaSlicer or Bambu Studio, but Orca adds the tools power users kept asking for: precise per-object settings, sandwich wall-order modes, single-wall first layers, fine-grained acceleration and jerk control, and detailed seam placement. Calibration is a first-class citizen, with built-in tests for temperature towers, flow rate, pressure advance, retraction and maximum volumetric speed, so dialing in a new filament takes minutes instead of an evening of wasted prints.

Model preparation is equally capable: import, merge and split multi-part models, add connectors, paint supports and multi-color assignments, emboss text, and arrange plates automatically. Multi-material prints are fully supported, including purge and flush tuning to keep color changes clean.

Printer support goes well beyond profiles on a list. For Bambu Lab machines, OrcaSlicer talks to the printer directly over the network: you can send prints, watch the camera and control the machine from the Device tab. Klipper, OctoPrint and other network printers get the same send-and-monitor treatment, and everything still works offline as a plain G-code exporter.

The project is licensed AGPL-3.0 and developed in the open on GitHub, where official builds for Windows, macOS and Linux are published with every release. A wiki covers the process settings in depth, and an active community keeps printer profiles current as new machines appear.

Releases arrive steadily - stable versions every few months, with nightly builds for the impatient.

The honest limits: OrcaSlicer assumes you know, or want to learn, what the settings do - the sheer number of options can bury a beginner, and the defaults are tuned for people who tinker. It slices FDM prints only, so resin printer owners need a different tool. And because development moves fast, the occasional regression slips into a release. For anyone who prints regularly and wants the most capable free slicer available, though, this is where the community has landed.