# 3MF to STL > Browser-based 3MF to STL conversion tool and reference site for privacy-first, compatibility-first 3D printing workflows. 3MF to STL helps users convert `.3mf` files into `.stl` files locally in the browser. The site is aimed at makers, hobbyists, engineers, and print-service users who need a simple path from modern slicer project files to STL mesh output. The most important product behavior is that conversion is local-first and STL output preserves mesh geometry, not slicer metadata. ## Primary Pages - [AI Overview](https://3mftostl.online/ai-overview.md): Single-file overview of the site, converter behavior, intended audience, and important constraints. - [Homepage markdown](https://3mftostl.online/index.html.md): Main converter overview, workflow, capabilities, and FAQ. - [3MF vs STL markdown](https://3mftostl.online/3mf-vs-stl.md): Comparison of format trade-offs, compatibility, and when export makes sense. - [How to Export 3MF to STL markdown](https://3mftostl.online/how-to-export-3mf-to-stl.md): Practical step-by-step export workflow. - [3MF to STL Online Free markdown](https://3mftostl.online/3mf-to-stl-online-free.md): Browser conversion guidance focused on privacy, speed, and free usage. ## Policies and Support - [Privacy Policy markdown](https://3mftostl.online/privacy.md): Local processing and analytics notes. - [Terms of Use markdown](https://3mftostl.online/terms.md): Scope and warranty limitations. - [Contact markdown](https://3mftostl.online/contact.md): Support contact details. ## Optional - [llms-full.txt](https://3mftostl.online/llms-full.txt): Expanded AI-readable overview with more detail about the converter, pages, and usage constraints.