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Converters
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GeoJSON
GeoJSON to ESRI Shapefile GeoJSON to GeoPackage GeoJSON to PMTiles
ESRI Shapefile
ESRI Shapefile to GeoJSON ESRI Shapefile to GeoPackage ESRI Shapefile to MBTiles
CSV
CSV to GeoJSON CSV to GeoPackage CSV to GPX
GPX
GPX to GeoJSON GPX to GeoPackage GPX to KML
GeoPackage
GeoPackage to GeoJSON GeoPackage to ESRI Shapefile GeoPackage to File Geodatabase
FlatGeobuf
FlatGeobuf to GeoJSON FlatGeobuf to GeoPackage FlatGeobuf to ESRI Shapefile
JSON-FG
JSON-FG to GeoJSON JSON-FG to GeoPackage JSON-FG to ESRI Shapefile
KML
KML to GeoJSON KML to GeoPackage KML to ESRI Shapefile
Mapbox Vector Tiles
Mapbox Vector Tiles to GeoJSON Mapbox Vector Tiles to GeoPackage Mapbox Vector Tiles to ESRI Shapefile
PMTiles
PMTiles to GeoJSON PMTiles to GeoPackage PMTiles to ESRI Shapefile
MBTiles
MBTiles to GeoJSON MBTiles to GeoPackage MBTiles to ESRI Shapefile
AutoCAD DXF
AutoCAD DXF to GeoJSON AutoCAD DXF to GeoPackage AutoCAD DXF to ESRI Shapefile
GML
GML to GeoJSON GML to GeoPackage GML to ESRI Shapefile
Microsoft Excel
Microsoft Excel to GeoJSON Microsoft Excel to GeoPackage Microsoft Excel to CSV
GeoRSS
GeoRSS to GeoJSON GeoRSS to GPX GeoRSS to KML
MapInfo
MapInfo to GeoJSON MapInfo to GeoPackage MapInfo to ESRI Shapefile
File Geodatabase
File Geodatabase to GeoJSON File Geodatabase to GeoPackage File Geodatabase to ESRI Shapefile
SpatiaLite / SQLite
SpatiaLite / SQLite to GeoJSON SpatiaLite / SQLite to GeoPackage SpatiaLite / SQLite to ESRI Shapefile
CSV to GeoJSON

CSV to GeoJSON Converter Online — Lat/Lon to Map | GeoDataViewer

Quick answer: Convert CSV latitude/longitude columns to GeoJSON online for a map-ready point layer. Preview the locations and download GeoJSON locally.

Before converting CSV to GeoJSON

Prepare the input

Use a header row and explicit numeric longitude/latitude columns in decimal degrees. Addresses alone are not coordinates. For mixed DMS or reversed columns, clean the table first.

Know what you download

GeoJSON output is a feature collection with geometry and readable attributes. Inspect the actual output coordinates before using it as a web-map layer.

Download a real CSV test file

Expected result: Three synthetic WGS 84 locations near London with name, latitude and longitude columns. Expect three point features, then compare their names and positions.

Limits and troubleshooting
  • Converting CSV to GeoJSON can change field types, metadata and presentation. A successful download does not prove every source element survived.
  • Confirm WGS 84 longitude/latitude placement in the downloaded output. Missing source CRS cannot be inferred safely; use a desktop GIS to assign or reproject an unknown CRS.
  • Browser memory varies by device. There is no guaranteed unlimited file size; split large datasets or use a desktop GIS when memory or WASM initialization fails.

If something goes wrong

  • No points or wrong location: select numeric coordinate columns, check decimal versus DMS and verify longitude/latitude order. Use coordinate cleanup for uncertain input.
  • Wrong continent or distorted geometry: inspect the source CRS, axis order and a known location. Valid syntax alone does not guarantee valid placement.
  • Conversion cannot start: reload while online so processing libraries and WebAssembly can load, then retry a smaller known-good sample. File contents are still processed locally.
  • Incomplete export: compare source/output counts, geometry families and key fields. Inspect warnings and keep the original file.
Source Format Guide

What is CSV?

CSV is a plain text table format that becomes geospatial only when rows include coordinates, WKT, or some other geometry-bearing columns.

CSV is attractive because almost every spreadsheet, BI tool, script, and database can read it, which makes it one of the easiest tabular handoff formats in data work.

In GIS workflows, CSV usually acts as an entry point or export format rather than a full spatial model because it does not natively encode geometry types, CRS metadata, or topology rules.

Common Workflows

Common use cases

  • Address lists, asset inventories, or sensor records with latitude and longitude columns.
  • QA exports where analysts need to sort and filter records outside a GIS application.
  • Quick imports into scripts, databases, cloud notebooks, or low-code data tools.
Ecosystem

Where you will encounter it

  • Spreadsheet and BI tools.
  • ETL pipelines, scripts, and cloud notebooks.
  • Business review workflows that need tabular delivery first.
Strengths

Why teams choose CSV

  • Very easy to open, inspect, diff, and load into general-purpose tooling.
  • Lightweight file structure works well for automated pipelines.
  • Good bridge format when the audience is not primarily using GIS software.
Limitations

Where CSV gets awkward

  • CSV has no native geometry model, so location must be inferred from columns or embedded text.
  • CRS, styling, topology, and richer feature metadata are not standardized in plain CSV.
  • Multi-geometry or multi-layer datasets are better stored in dedicated geospatial containers.
Conversion steps

How to convert CSV to GeoJSON online

  1. 1. Add your CSV file

    Drop the source data into the converter above. Keep any required sidecar files together when your dataset uses them.

  2. 2. Check the map preview

    Inspect the geometry and attributes before exporting so you can spot missing layers or coordinate-system issues.

  3. 3. Download GeoJSON

    Run the conversion and save the generated GeoJSON output directly from your browser. Your source file stays on your device.

File Structure

Common file extensions and sidecar files

.csv
Main comma-separated text table containing rows and columns.
latitude / longitude columns
Common convention for point locations when the CSV is used as geospatial input.
WKT or geometry text column
Optional way to carry non-point geometry in a flat table, depending on downstream tooling.
Conversion Rationale

Why convert CSV to GeoJSON?

Teams commonly convert CSV into GeoJSON when they need a web-friendly format that is easy to inspect and debug.

  • Teams convert CSV into GIS-native formats when they need explicit geometry support, CRS handling, or more reliable feature semantics.
  • CSV exports are also commonly converted into map-ready formats so the same records can be previewed and styled spatially instead of only as rows.
  • GeoJSON is readable as plain text and widely supported in web mapping libraries and APIs.
  • It is a practical handoff format when you need to validate geometry and attributes quickly.
FAQ

Frequently asked questions about CSV to GeoJSON

What do I need before converting CSV to GeoJSON?

Use a header row and explicit numeric longitude/latitude columns in decimal degrees. Addresses alone are not coordinates. For mixed DMS or reversed columns, clean the table first.

What exactly is in the GeoJSON download?

GeoJSON output is a feature collection with geometry and readable attributes. Inspect the actual output coordinates before using it as a web-map layer.

How large a CSV file can I convert?

The practical limit depends on browser memory, geometry complexity and the conversion driver. Start with a small sample. There is no guaranteed unlimited size and no cloud fallback or payment tier for large files.

Are my CSV files sent to a server?

File parsing and conversion run on your device. The page, WebAssembly and map basemaps can make network requests; choosing a file does not upload its contents. Load the required libraries before attempting offline work.

Can I use the output in Leaflet, MapLibre or Mapbox?

These libraries can read GeoJSON geometry and properties. Check that the actual output uses WGS 84 longitude, latitude and that required attributes survived. Add your web-map styling separately; KML styling is not a portable GeoJSON style specification.

Can I fix DMS, dirty cells or reversed latitude and longitude here?

Use the coordinate cleanup tool to choose the worksheet and columns, parse supported decimal/DMS values, review rejected rows and export KML or GeoJSON. Ambiguous coordinate order needs a known location; it is not silently guessed.

Related Converters

More CSV conversion paths

CSV to GeoPackage
Open, preview, and convert CSV data locally in your browser.
CSV to GPX
Open, preview, and convert CSV data locally in your browser.
GeoJSON & Shapefile Tools

More tools for working with your data

GeoJSON Viewer →
Open and inspect GeoJSON files on an interactive map with full attribute table support.
Shapefile Viewer →
Open SHP, DBF, SHX files directly in your browser with no upload.
GeoJSON Validator →
Validate GeoJSON for RFC 7946 compliance before publishing or sharing.

Format workflow cluster

More CSV and GeoJSON workflows

Use the related viewer, tools, guides, and conversion paths to continue the same GIS task without losing the source format context.