Why this tool is useful
Review a private map export, delivery boundary or field-data package for malformed coordinates and risky property content before it enters a GIS or spreadsheet flow.
Local File Tools · runs locally
Private GeoJSON Feature and Coordinate Auditor
Inspect a saved GeoJSON map for feature types, invalid positions, duplicate IDs, property structure, legacy CRS metadata and inert URL-like values without loading tiles, scripts or referenced resources.
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
The browser parses bounded JSON, validates each supported GeoJSON geometry and summarizes properties as inert data; it never follows a URL found in the file.
Practical example
Audit a FeatureCollection to find one longitude outside ±180°, a repeated feature ID and a description containing markup before sharing the map.
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.