IGES to STL Converter
LocalConvert IGES to STL for 3D printing in your browser — free, no upload, no sign-in. Binary STL with tessellation presets and mm/cm/inch output units.
Drag files here, or click to browse
Supports IGES, IGS
Choose fileGeometry values are treated as millimeters (OCCT output); cm = ×0.1, inch = ÷25.4, multiplied by the custom scale. If your source model is not in mm, correct it with the custom scale.
Finer presets mean more triangles, larger files and more memory. Standard suits most prints; High / Ultra suit precision parts and close-ups.
IGES → STL (OCCT triangulation in your browser; files are not uploaded)
Per-file cap: see the dropzone validation; very large models are bounded by browser memory.
Preview first: conversion and download happen only after you click the button above. Files are not uploaded.
What is it? IGES to STL Converter converts IGES CAD models into STL meshes ready for 3D printing or slicing, with tessellation presets and an output-unit / custom-scale control (mm / cm / inch, default mm = as parsed), running entirely in the browser.
TL;DR: Drop in an IGES 5.1/5.3 model, preview it on the page, pick a tessellation preset and an output unit (mm/cm/inch), then download a binary STL ready for your slicer. Free, no sign-in — tessellation runs locally in your browser, nothing is uploaded.
How to use
- Drop or select a .iges/.igs file — the model previews on the page (or click "Try a sample" to load sample-box.igs, a 10mm cube).
- Optionally pick a tessellation preset: Draft / Standard / High / Ultra, and set the output unit (mm / cm / inch) plus a custom scale if needed.
- Click Convert & download — the .stl saves to your downloads.
FAQ
Are curved surfaces smooth?
Surfaces are tessellated; the default resolution is suitable for printing.
My IGES is in inches — can I convert?
Yes — set the output unit to "inch (÷25.4)" (or use the custom scale); by default the mesh keeps the file's native coordinates (mm = ×1, no conversion). STL stores no unit either way, so still measure one known dimension in your slicer to confirm scale.
Is it private?
Yes — tessellation runs inside your browser tab and the file never touches a server, which matters for NDA-bound supplier work.
Where can I open the STL?
Any slicer or printing service — Cura, PrusaSlicer, Bambu Studio and friends all take STL. Need colors or scene structure for the web? Use CAD Export for OBJ/GLB instead.
Which IGES versions are supported?
IGES 5.1 and 5.3 — the versions most CAD systems still export. Older or rarely used entity types usually parse, but some may be approximated or skipped during tessellation.
Do I need CAD software like SolidWorks, NX or Creo?
No. Everything runs in your browser tab — no CAD license, plug-in or sign-in. That fits the common case where a supplier delivers an IGES file and you only need a printable STL for your slicer, including NDA-bound work.
Can I scale the model or change units for printing?
Yes — pick the output unit (mm / cm / inch, or a custom scale) before converting. The default keeps the file's native coordinates (mm = ×1). STL stores no unit either way, so measure one known dimension in your slicer to confirm the scale.
Why is the STL larger than the IGES file?
STL replaces every curved surface with flat triangles, so file size grows with the High and Ultra presets. Draft or Standard keeps meshes small; the output is binary STL, the compact variant slicers accept directly.
Examples
- Drop in an IGES file → preview → convert & download STL
Supported formats
Limitations
- Some IGES entity types may be approximated or skipped.
- Geometry survives (B-rep surfaces are tessellated to a binary STL triangle mesh); colors, materials and assembly structure do not — the STL format has no fields for them. Use CAD Export to OBJ/GLB when you need them.
- Tessellation precision presets: Draft / Standard / High / Ultra.
- Units: geometry values are treated as millimeters (OCCT output); the output-unit option scales them (cm = ×0.1, inch = ÷25.4) and a custom scale multiplies further — the default (mm, scale 1) keeps the file's native coordinates. STL stores no unit — measure one known dimension in your slicer to confirm scale.
- Very large files are memory-bound — tessellation can use far more memory than the source file. Keep IGES files under 100 MB; the dropzone rejects oversized files with a clear message. Runs locally — files are not uploaded.
Privacy
Privacy first: this tool runs entirely in your browser — your input and files never leave your device, and everything is cleared when you close the page.
Related tools
Standards & comparison
| Dimension | Vecaria (this tool) | Online converters (cloud) | Desktop professional CAD |
|---|---|---|---|
| Privacy | Runs locally in your browser; the file is not uploaded | You upload the file to a third-party server | Runs locally |
| Wait | No queue — as fast as your own device | Upload plus cloud queue | Local application startup |
| Standards support | IGES 5.1 / 5.3 | Varies by service, often older subsets | Full vendor protocol sets |
| Install footprint | 0 MB — runs in the browser | 0 MB | Several GB of storage |