Save SVG String

TS_SaveSVGString is the current name for the pack's save node - the one that used to be called SaveSVG before the June 17 rename. It's the terminal step of the whole pipeline, and its job fits in a sentence: take the SVG text a converter produced and write it to a real .svg file on disk. No image encoding, no re-rasterizing, just the markup you earned from the tracer, saved verbatim.

That verbatim part matters more than it sounds. A lot of "vector" workflows in this space quietly rasterize at the save step and hand you a picture of an SVG. This node writes the actual text file, which means the output stays resolution-independent - scale it to a billboard or engrave it at tiny size and it stays crisp. If you're doing laser cutting, plotting, screen printing, or shipping files to a designer, that's the whole point.

Inputs

• SVG_String - the SVG markup. Straight from a converter node (TS_ImageToSVGStringBW_Vtracer, TS_ImageToSVGStringColor_Vtracer, TS_ImageToSVGStringBW_Potracer), or from TS_SVGPathSimplify if you're saving the cleaned-up version.
• filename_prefix - default ComfyUI_SVG. The base filename.
• append_timestamp - default on, so files get a YYYYMMDDHHMMSS suffix and never overwrite. Flip it off for a stable name.
• custom_output_path - blank writes to ComfyUI's standard output folder; fill it to write anywhere you like. The directory is created if missing.

It's an output node with no outputs - the side effect is the point. The UI reports the saved filename and full path after each run.

Wiring it in

Trivial by design: image → converter → this node. Because the VTracer converters emit one string per batch image, feeding a batch writes multiple files using your prefix. Preview first with TS_SVGStringPreview so you're not saving four versions of a bad trace.

Install

Same pack install as everything here. ComfyUI Manager → search ComfyUI-ToSVG → Install → restart, or:

cd ComfyUI/custom_nodes
git clone https://github.com/Yanick112/ComfyUI-ToSVG/
cd ComfyUI-ToSVG
pip install -r requirements.txt

Requirements: vtracer, numpy, Pillow, torch, PyMuPDF, potracer. No model downloads, no API keys, CPU-only. Minor ecosystem note: ComfyUI core also ships a Save SVG node, but it writes from the core SVG object type (a BytesIO wrapper), not from a plain string. This pack's nodes produce plain strings, so use this save node - or bridge the types with the pack's BytesIO nodes if you specifically want the core one.