STL は 3D 印刷の標準形式です。モデル表面を三角形の集まりとして記録し、ほぼすべてのスライサーが読み込めます。
Typical use: 3D 印刷には STL、色や素材を保つなら GLB/OBJ に変換します。
About the STL format
STL は 3D 印刷の事実上の標準形式です。モデルの表面を三角形の集まりとして記録するため、構造が単純でスライサーが確実に読めます。
色や素材、単位の情報は持てません。形状だけを正確に渡す用途に向き、色を保ちたい場合は GLB/OBJ を選びます。
Strengths
- ✓ ほぼ全ての 3D プリンタが対応
- ✓ 構造が単純で扱いやすい
- ✓ 形状を正確に保持
Limitations
- ✗ 色・素材を保持できない
- ✗ メッシュが粗いと容量が増える
- ✗ Curved surfaces need huge triangle counts
- Structure
- Triangle mesh only
- Materials
- None
- Compatibility
- All slicers and CAD
- Best for
- 3D printing
Convert STL to…
4 direct directions plus 22 workflows, sorted A–Z; 🔥 marks popular targets.
Cross-engine workflows
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Frequently asked questions
What is a STL file?
STL is the workhorse format of 3D printing: a plain list of triangles describing the model surface, understood by every slicer and CAD tool.
How do I convert STL files online?
Pick a target format from the "Convert STL to…" list below, drop your file and hit convert. Everything runs in your browser — no install, no upload, no watermark, no limits.
Is it safe to convert STL files here?
Yes. Every conversion is performed by your own device inside the browser — files never leave for a server, and the page keeps working even offline.
Which formats can STL convert to?
This page lists all 26 directions across documents, images, audio, video, spreadsheets and archives — each one is its own free converter page.