Sheet Nesting Planner
Read actual polygon outlines and plan their positions on stock sheets. This places multiple cut parts rather than generating one box dieline or a photo grid.
Key features
- Convert a single closed polygon, rectangle or straight path from a millimetre SVG and reject invalid topology
- Place requested quantities in area-descending order, optionally trying 0°, 90°, 180° and 270° rotations
- Check actual polygon intersections and closest edge distances against the requested minimum gap
- Report parts that cannot fit or cannot be placed within the sheet limit
- Export an SVG for each sheet and a JSON record of positions, rotations and areas
How to use
- Supply each part as an SVG with physical millimetre dimensions, plus a name and quantity.
- Set stock width and height, edge margin, minimum spacing, allowed rotation and maximum sheet count.
- Run the planner and inspect outlines, positions, missing items and waste area for each sheet.
- Save the SVG or JSON, then verify kerf, grain direction and machine tolerances with your workshop.
Use cases
- Draft a laser-cut layout for L brackets and smaller inserts
- Compare stock count and waste when changing edge margins
- See the effect of enabling quarter-turn rotation
- Share a dimensioned SVG and coordinate list with a fabricator
Frequently asked questions
Does this guarantee minimum waste or optimal packing?
No. This is a deterministic area-descending candidate-placement heuristic. The sheet cap or limited candidates may leave parts unplaced, and a better arrangement may exist.
Which SVG shapes are supported?
One polygon, rectangle or straight M/L/H/V/Z path in an SVG with mm width and height plus an equally scaled viewBox. Curves, holes, transforms and multiple outlines are rejected rather than silently approximated.
How is waste area calculated?
It is the area of sheets actually used minus the sum of actual polygon areas. Edge-margin area is shown separately as a subset of waste. Kerf and unused stock outside these sheets are excluded.
Can the SVG be sent straight to a cutting machine?
No. This is a planning drawing. Toolpaths, kerf, material grain, lead-ins, tabs, interior holes, machine compensation and manufacturing tolerances need workshop review.
Privacy
SVG files are read in this browser, and the layout SVG and JSON are produced locally. Files are not uploaded.
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