How to svg stroke expansion: quality considerations and edge cases
- Step 1Check miter join limit — Very sharp angles with miter joins can produce extreme miter spikes when expanded. Check the SVG's stroke-miterlimit attribute — the default is 4. If your paths have sharp angles, switch to round or bevel join before expanding.
- Step 2Test paths with varying stroke widths — If your SVG uses multiple stroke-widths across different elements (common in illustrations), verify each expanded element looks correct in isolation.
- Step 3Check overlapping strokes — Overlapping stroke paths may produce unexpected fill shapes where paths cross. Convert crossing paths to compound paths in your design tool before running stroke expansion.
Frequently asked questions
What is a miter spike and how do I prevent it?+
A miter spike occurs when two paths meet at a very sharp angle and the miter join extends far beyond the path corner. Prevent it by setting stroke-miterlimit to 1 (equivalent to bevel join) or using stroke-linejoin: round before converting.
Does the tool handle variable-width strokes?+
No. SVG's stroke-width is uniform along the entire path. Variable-width strokes (as in calligraphic brushes) are a design tool feature, not standard SVG — they're typically exported as filled paths already.
Why does my expanded path have extra triangular artifacts?+
Triangular artifacts at path intersections are caused by miter join expansion. Switch to round joins (stroke-linejoin: round) before expanding to eliminate these artifacts.
What is the maximum path complexity the converter handles?+
The converter has been tested with paths up to 10,000 control points. Processing time scales linearly with path complexity. Very complex illustrated paths (100,000+ points) may time out on the browser-based tool — use the API for those.
Privacy first
Every JAD SVG tool runs entirely in your browser using the DOM API and Canvas. Your SVG files never leave your device — verified by zero outbound network requests during processing.