Image to SVG

Sometimes the end product isn't a PNG. Logos, stickers, laser-cutting paths, web assets that need to scale to any size - those want a vector, and LF_ImageToSVG is the node that gets you there without leaving ComfyUI. It vectorizes a raster image into actual SVG path data using vtracer, the fast open-source bitmap-to-vector tracer, and hands you the SVG as a string plus a palette.

Let's be clear about what it is and isn't: this is tracing, not magic. It works brilliantly on flat, high-contrast artwork - logos, stickers, icons, illustration with clear color regions - and it produces a mess on photographic gradients, where every tiny color shift becomes another path. If your input looks like a poster, this will make it a clean scalable asset. If it looks like a photo, you're going to get a heavy, muddy SVG.

How it works

image goes in, and the trace quality comes from preset:

• max_quality (default) - 8-color trace with heavy fidelity and slow speed. The right default for finished assets.
• high_quality / balanced - the middle tiers, fewer colors, faster.
• max_speed - for previews or batch work where you'll re-trace the winner later.
• custom - unlocks advanced_config (a JSON blob mapping to the tracer's config fields) if you want to hand-tune num_colors, tolerances, and so on.

The optionals worth knowing: mask lets you bring an alpha mask (white keeps, black becomes transparent), so you can trace with transparency instead of a boxed background. render_mode switches between fill / stroke / both output, with fill_color, stroke_color, stroke_width as overrides. And size_mode controls whether the SVG is responsive (width/height 100%) or fixed (pixel dimensions), plus a viewbox override for hand-crafting the coordinate space.

Outputs

svg / svg_list - the generated SVG string(s), which you can write to disk with a file-save node. It also passes through image / image_list (the original), and palette / palette_list - the color set the trace used, handy if you want to re-save the palette or feed it to a color-count node.

Installing it

lf-nodes installs as a pack:

cd ComfyUI/custom_nodes
git clone https://github.com/lucafoscili/lf-nodes

restart ComfyUI, or ComfyUI Manager → "LF Nodes". This is one of the few nodes whose real dependency (vtracer plus svgwrite for SVG output) sits in the pack's requirements.txt - so the install covers it, but only for this pack.

Common issues

• SVG is enormous / bloated - you traced a photographic image. Drop to max_speed or a lower-color preset, or reconsider whether tracing is the right tool.
• Background rectangle instead of transparency - you forgot the mask, or left background_color set. Feed a mask to keep the canvas transparent.
• Colors look off - the trace quantizes to the preset's color count. That's the palette doing its job; bump up a preset tier if the loss is unacceptable.