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Description
Compare two GeoJSON layers: added, removed, changed. Runs locally in your browser. Geo Diff compares a “before” and “after” GeoJSON layer so you can see what changed. What it does • Match features by property ID, geometry fingerprint, or index • Classify added / removed / changed / unchanged • Detect geometry changes and attribute changes • Color-coded map preview • Export changed features, tagged GeoJSON, or a JSON report Why it’s useful • Review data updates before publishing • QA digitizing edits between versions • Spot missing IDs and duplicate keys Privacy • Files are processed locally on your device • Map tiles load from OpenStreetMap for preview only • No account required — processed on your device How to use 1. Click the Geo Diff icon 2. Load Layer A (before) and Layer B (after) 3. Choose how to match features 4. Review the summary and map, then export