KISSlicer review
A capable free slicer with affordable upgrades, but a narrow STL-focused workflow.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
KISSlicer is desktop 3D-printing slicing software for converting STL models into printer-ready G-code. It suits budget-conscious FDM users who want a free starting point and the option to add paid capabilities later. The workflow includes printer, material, style, and support profile wizards, automatic support generation with configurable triggers, adaptive or stepover-controlled layers, project files with active profiles, and toolpath visualization. Official downloads cover Windows, macOS, and Linux, with additional downloads listed for FreeBSD and Raspberry Pi.
The pricing structure is straightforward for buyers who prefer one-time licensing. The free version includes core slicing capabilities such as automatic supports, adaptive layers, infill controls, multi-material preparation, and visualization. The Pro license costs $42 one time and unlocks multi-material prints. The Premium Upgrade costs $40 one time and upgrades an existing Pro key while including Premium functionality. A new Premium license costs $82 one time, includes all Pro functionality, and adds Premium features. The site describes Premium pricing as early-adopter promotional pricing, so buyers should review the current terms before purchasing.
KISSlicer’s strength is focused desktop slicing rather than broad platform or ecosystem coverage. Its feature set reaches beyond basic slicing with multi-extruder preparation, variable-density and gyroid infill, configurable supports, and profile-based project files. However, STL is the listed input format, and the positioning emphasizes limited integrations. Resin output is described as very preliminary SVG output, which makes the software a weaker fit for users centered on resin workflows. Choose KISSlicer for affordable FDM slicing across major desktop operating systems; choose another tool if broader input support, deeper integrations, or more developed resin output is central to the workflow.
KISSlicer pros and cons
- Where it wins
- Free plan includes automatic supports and adaptive layer heights
- Supports multi-material preparation, variable-density and gyroid infill
- Runs on Windows, macOS, and Linux with toolpath visualization
- Where it doesn't
- STL is the listed model input format
- Resin output is described as very preliminary SVG output
- The site states there is generally no return policy
KISSlicer fact sheet, pricing and score →
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