Freestyle SVG Exporter is a Blender add-on that outputs Freestyle's stylized edges in SVG format. The add-on was originally created by Folkert de Vries and was part of Blender 4.1's bundled add-ons. It is now offered as-is, with limited support.
You control it from Properties → Render → Freestyle SVG Export inside Blender. The download is compact at 7.5 KB and requires no special permissions to run. It has been downloaded more than 59,000 times and sits at rank 72 in the blender_extensions library.
The current release is version 1.0.0, published in May 2024, with no changelog noted for this version. It lists compatibility with Blender 4.2 LTS and newer and is released under the GNU General Public License v2.0 or later. For documentation and installation guidance, refer to the developer's page.