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Free, private, browser-based 3D file converter.

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© 2026 3DFileKit. All Rights Reserved.

About 3DFileKit

Hi, I'm Mike Xie (谢淼, 老谢/Laoxie). I'm an indie developer based in China, building small web tools that solve real problems. 3DFileKit is my attempt to make 3D file conversion fast, free, and private — entirely in your browser, without uploading your files to anyone's server.

Why I built this

Anyone who works with 3D files knows the pain: you download a model in OBJ, but your slicer only takes STL. You get a GLB from a client, but your pipeline expects OBJ. The existing tools either charge for basic conversions, require you to upload your files to a cloud server, or simply don't work in the browser. I wanted something different — a tool that respects your privacy, works instantly without an account, and runs entirely on your own machine. 3DFileKit uses Three.js to parse and export 3D files directly in the browser. Your files never leave your device. Ever.

Built with Next.js, Three.js, and a love for the 3D printing community.

Connect with me

  • X / Twitter: @Laoxie1890
  • GitHub: github.com/xiemiao
  • Email: mike@3dfilekit.com