How to Build an SVG Path Generator Tool
Build a tool that programmatically generates SVG path 'd' attribute data for shapes like polygons and stars.
Drop your image here
Supports PNG, JPG, BMP, WEBP up to 5MB
Generating Polygon and Star Paths
Use trigonometry to calculate vertex coordinates for regular polygons or stars based on a center point, radius, and number of sides, then format the coordinates into an SVG path 'd' string.
- Calculate vertex angles using 2*PI divided by the number of sides
- Convert polar coordinates (angle, radius) to x,y Cartesian points
- Join points into a path string with M, L commands and Z to close
Generating Arcs and Curves
For arcs, use the SVG path 'A' command with calculated start and end points, or use cubic Bezier 'C' commands for custom curved shapes, exposing sliders for curve control points in your tool's UI.
- Use the A command for circular/elliptical arc segments
- Use C or Q commands for custom Bezier curve shapes
- Expose interactive sliders to adjust curve control points live
Frequently Asked Questions
What's the easiest shape to start a path generator with?
Regular polygons (triangles, hexagons) are a good starting point since vertex calculation only requires basic trigonometry before tackling more complex stars or curves.
How do I close a generated path correctly?
End the path data string with the Z command, which draws a straight line back to the path's starting point and closes the shape.
Related guides
Ready to Convert Your Image to SVG?
Free online converter — no sign-up, no watermarks, results in under 3 seconds.
Try It Free — Convert Image to SVG