GEOJSON MIME Type

About GeoJSON files

GeoJSON (RFC 7946) describes points, lines and polygons as JSON, with coordinates in longitude, latitude order. Map libraries such as Leaflet, Mapbox GL and OpenLayers load it directly, and GitHub renders .geojson files as maps.

File signature

GEOJSON has no fixed signature: it is data without a magic number, so validate uploads by parsing the content rather than by checking bytes.

Serve .geojson with the right Content-Type

Content-Type: application/geo+json

application/geo+json geojson;

AddType application/geo+json .geojson

@geojson path *.geojson
header @geojson Content-Type "application/geo+json"

curl -sI https://example.com/file.geojson | grep -i '^content-type'
# Content-Type: application/geo+json

Set the type in code

res.set('Content-Type', 'application/geo+json');
// Or make the browser download it:
res.attachment('file.geojson');

import mimetypes

mimetypes.add_type('application/geo+json', '.geojson')  # if your system doesn't know it
mimetypes.guess_type('file.geojson')[0]  # 'application/geo+json'

mime.AddExtensionType(".geojson", "application/geo+json")
w.Header().Set("Content-Type", "application/geo+json")

Accept .geojson uploads

<input type="file" accept=".geojson,application/geo+json">

The accept attribute only filters the file picker; users can still choose another file. Listing the extension as well as the type matters, because operating systems don’t always report the type you expect.

Related types

• .json (application/json): JSON
• .jsonld (application/ld+json): JSON-LD
• .csv (text/csv): CSV

More data and text

.txt , .tsv , .md , .ndjson , .xml , .yaml , .ics , .sql . Look up any extension or type with the MIME type lookup.

Sources

• IANA registration: application/geo+json
• MDN: Common media types

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Frequently asked questions