Convert STL to OBJ in your browser

STL is documented in both its ASCII and binary forms, so this page reads either one on your machine and writes a Wavefront OBJ. Useful when a print-ready mesh has to go into a renderer or CAD package that will not take STL.

الأداة والعناوين بالعربية. أما الملاحظات المرجعية أدناه فهي بالإنجليزية.

STL → OBJ converter

Runs entirely in this browser tab. Your file is never uploaded and nothing is stored.

أفلِت ملف STL هنا، أو اضغط لاختياره

or — no sign-up required

هل تحتاج إلى متخصص في CAD/BIM للتعديل على هذا الملف؟

هل تحتاج إلى معالجة ملف CAD أو نموذج ثلاثي الأبعاد؟ انشر فرصة عمل تحدد صيغة المصدر والصيغة المطلوبة والفحوص اللازمة، واتفق على نطاق العمل قبل البدء.

خطوة بخطوة

  1. 1Drop the .stl file above — binary and ASCII STL are both detected automatically.
  2. 2Download the .obj and import it with the units you know the original used.
  3. 3In a renderer, assign a material after import: STL had none to carry across.
  4. 4For CAD documentation, convert onwards to DXF so the mesh arrives as 3DFACE entities.

أمور يجب الحذر منها

  • Vertices are not welded. STL repeats every corner per triangle, so the OBJ has duplicate vertices — run a merge-by-distance in Blender or MeshLab if that matters.
  • Large binary STLs (millions of triangles) are slow in a browser tab; a desktop tool is faster past roughly 2 million facets.
  • No colours or materials exist in standard STL, so none appear in the OBJ.
STL — Stereolithography mesh

The triangle-soup format every 3D printer and mesh tool reads. Openly documented in both ASCII and binary form, with no units, colours or structure.

OBJ — Wavefront OBJ

A plain-text mesh format listing vertices and faces — openly documented, which is why it can be read and rewritten in the browser.

أسئلة يطرحها الرسامون الفنيون

Will the OBJ be a solid I can machine from?

No. Both formats store surface triangles. For a true solid you need STEP or Parasolid out of the originating CAD package.

Can it read colour STL variants?

The colour extensions some slicers write are non-standard and are ignored here; only geometry is converted.

Paid to draft, model or coordinate?

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