> ## Documentation Index
> Fetch the complete documentation index at: https://docs.opengeometry.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Exports

> Export OpenGeometry results to 2D drawings and 3D interchange formats

## Overview

OpenGeometry supports both 2D and 3D export workflows:

* **2D drawings**: project a 3D B-Rep to 2D lines (optionally with hidden line removal), then export
  as PDF in native builds
* **3D interchange**: export B-Reps or scenes to STL, STEP, or IFC

## Runtime differences

### Browser/WASM

In the WebAssembly build, export APIs return data in-memory:

* STL: `Uint8Array` bytes
* STEP: text
* IFC: text

You download the data (Blob) or send it to your backend for persistence.

### Native builds

Some convenience functions (PDF export and file-writing helpers for STL/STEP/IFC) are only available
in native builds and are not available in browser/WASM environments.

## Export config JSON

Scene exports accept an optional `config_json` string:

* If `config_json` is omitted, `null`, `undefined`, or an empty string, OpenGeometry uses defaults.
* If you provide `config_json`, the payload must deserialize into the full config struct. Missing
  required fields cause an error. If you want defaults, omit the config entirely.

## Experimental status

<Warning>
  Projection/hidden line removal, PDF export, STL export, STEP export, and IFC export are
  experimental. Output and config schemas may change. If you hit an exporter limitation or confusing
  output, reach out on [Discord](https://discord.gg/cZY2Vm6E).
</Warning>