Why this tool is useful
Prepare a private map for a local GIS workflow, custom visualization or controlled data pipeline without granting an online converter access to its locations.
Local File Tools · runs locally
Private KML to GeoJSON Converter
Convert KML placemarks and supported geometries into a GeoJSON FeatureCollection while preserving folder paths, timestamps and descriptions as inert properties and skipping invalid coordinate tuples.
Ready. Your working data stays in this browser.
Files and capture streams stay on this device. Processing uses browser APIs only; nothing is uploaded to YTSave, the media API or a proxy. No server copy is created, stored or left to delete. The file picker is cleared when processing starts, and disposable worker memory is destroyed after completion or cancellation. Preview and generated-output memory is released when you clear the tool or leave the page.
How it works
Each placemark becomes one feature: KML geometry is mapped to GeoJSON, gx:Track times stay aligned with valid positions and no referenced icon or link is fetched.
Practical example
Convert a saved route map to GeoJSON, verify its folder paths and timestamps, then download the result for use in a desktop mapping application.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.