Turn CSV tables with coordinates into a GeoJSON file ready for web maps and APIs. Free, private and processed right in your browser.
Three steps, no software to install. Works on Windows, macOS, Linux and mobile.
01
Drop a .csv file with coordinate columns into the converter, or click to browse. Files up to 100 MB are supported.
02
Click Convert to GeoJSON. The file is processed locally, so your data is never uploaded to a server.
03
The GeoJSON file downloads straight to your device. Need another format? Pick a converter below.
Converted your CSV file? Upload it to GISCARTA and turn it into an interactive map your team or clients can actually use.
Colour by attribute, cluster thousands of points, switch on 3D.
Charts and key numbers next to the map, updated as you filter.
Animate dated features and compare how places change.
Publish a read-only map, embed it on your site, or keep it private with role-based access.
No credit card. No GIS degree. Upload your data and start mapping in minutes.
CSV is built for spreadsheets, databases and BI tools. GeoJSON is built for web maps, APIs and JavaScript apps.
CSV
CSV (comma-separated values) is plain text where each line is a row and commas separate the columns. Location is stored in coordinate columns, such as latitude and longitude, or as WKT geometry text.
Every spreadsheet, database and BI tool reads CSV, which makes it the universal hand-off format. It has no data types, styles or coordinate system metadata.
GeoJSON
GeoJSON is an open standard (RFC 7946) for describing geographic features in JSON. Each feature pairs a geometry — point, line or polygon — with a set of properties.
It is the native format of web mapping libraries like Leaflet, Mapbox GL and OpenLayers, and of most geospatial APIs. The trade-off: plain text gets heavy for large datasets.
Your CSV file
The CSV needs coordinate columns (latitude/longitude or X/Y) or a WKT geometry column, so every row can be placed on the map.
The GeoJSON output
GeoJSON expects WGS84 longitude/latitude, so coordinates are written in that system for maximum compatibility.
Your file never leaves your device: conversion runs in your browser, for files up to 100 MB.
Load CSV data straight into Leaflet, Mapbox GL or OpenLayers — no server-side GIS needed.
Pass CSV features to front-end code and REST APIs in the format developers expect.
Keep the converted CSV data as readable text that GitHub previews and diffs line by line.
Every converter runs in your browser and keeps your files on your device.
