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3D & animation

STLFixer

Free browser-based STL repair tool for 3D models

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A free online tool to inspect 3D models, fix mesh issues like holes and incorrect orientation, and download repaired STL files without uploading data to

About this launch

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stlfixer.io, as visitors see it

STLFixer is a free, browser-based STL inspection and repair tool that runs locally on your device. It helps users identify and fix common 3D mesh problems including holes and open boundaries, incorrect face orientation, duplicate faces, degenerate triangles, non-manifold edges, and selected self-intersections. The tool accepts ASCII and binary STL files up to 50 MB and provides detailed before-and-after comparisons of repairs. Users can optionally scale their models and download verified results without any file being sent to servers.

What it does

  • Inspect 3D mesh geometry and measurements
  • Repair duplicate faces and degenerate triangles
  • Fix incorrect face orientation
  • Close small triangular holes
  • Handle selected self-intersections
  • Compare before and after repairs
  • Optional uniform scaling of models
  • Download repaired STL files
  • Process files up to 50 MB
  • Local browser processing with no file upload

Pricing

Pricing model: Free

Shopper questions

What is an STL file?

An STL file describes a 3D surface using triangles, without reliable units or material data. It stores mesh geometry rather than original CAD design information.

Will STL repair change the shape or scale?

Repair cleanup removes invalid faces and orientation correction changes winding order, while hole closing adds triangles. The tool aims to preserve dimensions and does not automatically scale models or infer units.

Does this STL fixer upload my file?

No. Your STL file is read locally in the browser. The tool does not send file names, contents or mesh data to a server and has no file-upload endpoint.

Does STL repair guarantee a successful print?

No. The tool checks geometry but not wall thickness, strength, printer tolerances, supports or materials. A successful repair does not guarantee every slicer interprets the model identically.

More on this profile

STLFixer has a free listing. The owner can unlock the full profile with a paid launch for $5:

  • Founder story (locked)
  • Milestones (locked)
  • Demo video (locked)
  • Dofollow website link (locked)

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