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Nominatim

Geocoding and reverse geocoding for OpenStreetMap data

Maps & GIS ★ 4.5k stars Hard setup GPL-3.0

Nominatim is a tool to search OpenStreetMap data by name and address and to generate addresses from coordinates. It powers the search box on openstreetmap.org and can be self-hosted as a geocoding API.

Official siteSource code

Key features

  • Address search
  • Reverse geocoding
  • OSM data based
  • Self-hosted geocoding API

Strengths

  • Released under the GPL-3.0 license
  • First-class Docker support for quick deployment
  • Active community (4.5k GitHub stars)
  • Written in Python

Is Nominatim secure?

OSV.dev has no published security advisories for Nominatim's repository. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

Source: OSV.dev, checked 2026-10-14. How this is measured.

Nominatim replaces

Self-hosted Google Geocoding API alternatives

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SelfHostIndex: 87 · excellent

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