Mapshaper
A JavaScript-based tool for editing and simplifying Shapefile, GeoJSON, TopoJSON, and CSV geographic data formats.
What is Mapshaper?
Mapshaper is a JavaScript-based tool for editing and simplifying geographic data files like Shapefile, GeoJSON, TopoJSON, and CSV. It solves the problem of processing and optimizing spatial data for mapping and analysis through both a web interface and command-line tools. All data processing occurs locally in the browser or via CLI, ensuring privacy and control over sensitive geospatial datasets.
Cartographers, GIS professionals, data journalists, and developers working with spatial data who need to edit, simplify, or convert geographic file formats. It's particularly useful for those creating web maps or needing to automate geospatial workflows.
Developers choose Mapshaper because it offers a unique combination of a privacy-focused web interface with no server-side processing and powerful command-line automation tools. Its ability to handle large files and support multiple GIS formats in one tool makes it more versatile than many single-format alternatives.
Overview
Tools for editing Shapefile, GeoJSON, TopoJSON and CSV files
Use Cases
Best For
- Simplifying complex polygon geometries for web map performance
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