Compare PrusaSlicer vs. Slic3r in 2025

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Description

PrusaSlicer is an advanced slicing software that we developed in-house, building upon the foundation of the open-source Slic3r project. This robust, frequently updated tool is completely free and open-source, designed to provide everything necessary for generating optimal print files for your original Prusa 3D printer. It stems from the work of Alessandro Ranellucci on Slic3r, and with the backing of a dedicated community and the core development team at Prusa Research, we continuously enhance its capabilities. You can keep track of ongoing developments through our Github page. One of the standout features allows users to paint custom supports directly onto their models, as well as block supports that the software generates in specific areas. Additionally, users can employ custom mesh designs to serve as support blockers or enforcers, ensuring that all adjustments are saved within the project file and remain easily customizable. Our team of testers and developers at Prusa Research is tirelessly working on profiles for over 150 filaments and resins, and we consistently update these profiles to keep pace with the latest materials from leading manufacturers. This commitment to improvement and user-friendliness makes PrusaSlicer an indispensable tool for 3D printing enthusiasts.

Description

The Slic3r project has seen extensive and ongoing development efforts. Be sure to download version 1.3.0 or explore the latest development builds! This software, created by Alessandro Ranellucci with contributions from an incredible community, is available for free. It enables users to convert their 3D models into G-code easily. Users can visualize toolpaths and manage advanced configurations. Additionally, it allows for custom G-code creation with conditional logic, and supports a print spool queue for simultaneous printing on multiple machines or integration with OctoPrint. Slic3r caters to both FDM/FFF and SLA/DLP printing processes, featuring modifiers that enable distinct settings for customized regions. Most of its functionalities can be accessed through the command line, making it a versatile tool for batch operations and custom integrations. Furthermore, it includes a C++ library that facilitates the development of custom applications utilizing Slic3r's internal algorithms. The software can handle various operations on 3D models, such as opening, repairing, transforming, and converting them. Users can generate G-code in multiple formats, create different infill patterns, send G-code over a serial port, and even estimate the printing time for G-code projects, illustrating its comprehensive capabilities.