Files never leave your device
Convert GIS data without uploading it
10 input formats, 10 output formats, reprojection between 180+ coordinate systems, geometry validation and a live map preview — all running inside your browser.
Drop GIS files here, or click to browse
Everything runs in your browser. Files are never uploaded, and batches are converted together.
Up to 2 GB per file · multiple files supported
Nothing leaves your machine
Parsing, reprojection and writing all happen in a Web Worker. No uploads, no storage, no telemetry.
Formats that actually round-trip
Real .shp/.shx/.dbf/.prj output, KML/KMZ, GPX, GML, TopoJSON, NDJSON, WKT and delimited text.
Check before you download
Inspect the schema, repair invalid geometry and preview the result on a map before saving.
How it works
Three steps, zero uploads
- 01
Drop your files
Shapefile ZIPs, GeoJSON, KML, GPX, GML, CSV or WKT — one file or a whole batch.
- 02
Pick format & CRS
Choose the output, reproject between 180+ coordinate systems and trim attributes.
- 03
Preview & download
Check geometry on the map, then save a single file or the whole batch as a ZIP.
Popular conversions
Frequently asked
Are my files uploaded to a server?
No. Every step — reading, validating, reprojecting and writing — runs in a Web Worker inside your browser. Nothing is sent over the network, so the tool works on sensitive and offline data.
Which formats can I convert between?
Shapefile (zipped), GeoJSON, GeoJSON Lines (NDJSON), TopoJSON, KML, KMZ, GPX, GML 3.2, CSV/delimited text and WKT. Any input can be written to any output.
Can I reproject coordinates?
Yes. Pick any of 180+ built-in coordinate reference systems, or paste a custom proj4 definition. KML, KMZ and GPX are always written in WGS 84, as their specifications require.
How large a file can I convert?
GeoJSON, NDJSON, CSV and WKT are read as streams, so datasets in the hundreds of megabytes work. Formats that must be parsed whole — KML, GML, TopoJSON and shapefile ZIPs — are limited by the memory available to the tab.
Does it cost anything?
Casual use is free: 3 conversions a day, no account needed. Beyond that a 24-hour pass is $2.99 and unlimited use is $5 a month or $39 a year, cancellable in one click. Conversion runs in your browser on every plan.