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Privacy and security
Imported coordinates and generated exports stay in page memory. The app has no telemetry, analytics, account, persistence, map-tile request or other runtime network path. Names and properties are rendered as React text and escaped on XML export.
Text/file input is limited to 16 MiB and the common model to 200,000 coordinates. XML is rejected above 250,000 elements or 256 levels before DOM parsing; DOCTYPE, entity and XML stylesheet declarations are rejected. These controls bound supported input but are not a general XML sanitiser.
Coordinates are interpreted as WGS 84 longitude/latitude. There is no CRS transformation and the local SVG sketch is not a map projection. Distance is a spherical approximation, elevation gain/loss uses the supplied samples without smoothing, and conversion intentionally drops unsupported styles, extensions, geometry structure or properties as stated beside each result. Do not treat results as survey-grade measurements.