Geocoding · head-to-head
adresse.data.gouv.fr vs GeoJS
The Base Adresse Nationale's API Adresse geocodes and reverse-geocodes French addresses for free with no API key, backed by Etalab and IGN's data.geopf.fr infrastructure (the older api-adresse.data.gouv.fr host still answers directly and does not redirect). Requests and responses use the GeoJSON FeatureCollection format, with each result scored for match confidence and enriched with INSEE city codes, postcodes, and population. A live Origin-header probe confirms open CORS (Access-Control-Allow-Origin: *), so it works directly from browser JavaScript with no proxy.
GeoJS is a free, no-signup IP geolocation lookup that returns country, city, ASN, and timezone data as JSON or JSONP over HTTPS with open CORS. It's built for simple client-side and ChatOps integrations rather than high-volume commercial traffic, and has no paid tier.
| adresse.data.gouv.fr | GeoJS | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | free |
| Formats | GeoJSON | JSON, JSONP |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
GeoJS supports 2 response formats, while adresse.data.gouv.fr offers fewer — pick GeoJS for more integration flexibility.