Shapefile Reducer — free & private
Reduce large Shapefiles in the browser: simplify geometry, clean coords, filter polygons, and split into batches. No uploads.
FAQ
Do you upload my data?
No. Everything runs locally in your browser.
What files do I need?
Use a .zip containing at minimum .shp and .dbf. A .prj is recommended.
Will simplifying break my polygons?
It can if tolerance is too aggressive. Start small (e.g. 1e-5 to 5e-5 degrees for WGS84) and check the preview.
How does batching work?
It splits features into N-per-batch and outputs a single ZIP containing batch Shapefile ZIPs.
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