While Adobe Illustrator's trace feature is a popular choice for converting raster images into vector line drawings, there are a few free alternatives that can do a similar job. One standout option is Inkscape, an open-source vector graphics editor that offers a powerful tracing tool called "Trace Bitmap." This tool allows users to convert images into scalable vector artwork with various settings to control the precision and style of the tracing process. Inkscape is widely used by professionals and hobbyists alike, making it a solid free alternative to Illustrator for vectorizing images.

Another great free option is Vectr, which offers an easy-to-use interface for turning images into vector line drawings. While it’s not as feature-packed as Illustrator or Inkscape, Vectr’s simplicity makes it a great tool for beginners. It supports basic vectorization features and is cloud-based, allowing you to access your projects from any device. Suppose you need help optimizing your images further for professional use. In that case, Photo Sketch Maker can convert image to line drawing with AI-powered tools, providing detailed results and helping you visualize your designs more effectively.