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• GeoDataViewer Team

What Is a Shapefile? (.shp + .dbf + .shx Explained)

What is a Shapefile and why does it include multiple sidecar files? Learn how Shapefile works, common issues, and how to open Shapefiles online.

A Shapefile is a widely supported GIS vector format originally popularized by ESRI. Despite the name, a “Shapefile” is usually not a single file. It’s a small set of files that belong together, typically including geometry, attributes, and an index.

To open one in the browser, use the Shapefile viewer: /open-shapefile-online/.

Why Shapefile has multiple files

Common Shapefile sidecars include:

  • .shp — geometry
  • .dbf — attribute table (fields and values)
  • .shx — geometry index
  • .prj — coordinate reference system (recommended)

If you upload only .shp, many viewers cannot load the layer correctly because attributes or the index may be missing.

When Shapefile is a good choice

Use Shapefile when you need:

  • Maximum compatibility with existing GIS tools
  • A simple “one layer” dataset you can package as a zip archive
  • Interoperability with workflows that still expect .shp

Common issues

  • Missing sidecars: forgetting .dbf or .shx often breaks loading.
  • CRS problems: without .prj, the layer can appear in the wrong location.
  • Packaging: because it’s multi-file, it’s easiest to share as a single .zip.

How to open a Shapefile online

  1. Go to /open-shapefile-online/.
  2. Upload the full set (.shp, .dbf, .shx, and ideally .prj).
  3. If the dataset is multi-file, upload a .zip containing all sidecars together.

Convert Shapefile to modern formats