Mapbox to MapLibre Migration

This skill guides you through migrating an application from Mapbox GL JS to MapLibre GL JS. The two libraries share a common ancestry (MapLibre forked from Mapbox GL JS v1.13 in December 2020), so the API is largely the same. The main changes are: swap the package, replace the namespace, remove the Mapbox access token, and choose a new tile source (MapLibre does not use mapbox:// styles).

Primary reference: MapLibre official Mapbox migration guide.

When to Use This Skill

• Migrating an existing Mapbox GL JS app to MapLibre
• Evaluating MapLibre as an open-source alternative to Mapbox
• Understanding API compatibility and what breaks
• Choosing tile sources and services after moving off Mapbox

Why Migrate to MapLibre?

Common reasons teams switch from Mapbox to MapLibre:

• Open-source license — MapLibre is BSD-3-Clause; no vendor lock-in or proprietary terms
• No access token — The library does not require a Mapbox token; tile sources may have their own keys or none (e.g. OpenFreeMap)
• Cost — Avoid Mapbox map-load and API pricing; use free or fixed-cost tile and geocoding providers
• Self-hosting — Use your own tiles (PMTiles, tileserver-gl, Martin) or any third-party source
• Community — MapLibre is maintained by the MapLibre organization and community; style spec and APIs evolve in the open
• Community-supported funding — MapLibre is funded by donations from many companies and individuals; there is no single commercial backer, so the project stays aligned with the community
• Open vector tile format (MLT) — MapLibre offers MapLibre Tile (MLT), a modern alternative to Mapbox Vector Tiles (MVT) with better compression and support for 3D coordinates and elevation; supported in GL JS and Native, and can be generated with Planetiler

What you give up: Mapbox Studio integration, Mapbox-hosted tiles and styles, Mapbox Search/Directions/Geocoding APIs, official Mapbox support.

Understanding the Fork

• Dec 2020: Mapbox GL JS v2.0 switched to a proprietary license. The community forked v1.13 as MapLibre GL JS. MapLibre organization and GL JS repo are the canonical homes.
• API: MapLibre GL JS v1.x is largely backward compatible with Mapbox GL JS v1.x. Most map code (methods, events, layers, sources) works with minimal changes.
• Releases since the fork: MapLibre has moved ahead with its own version line. v2.2 added 3D terrain and v3 moved to WebGL2; v4 introduced Promises in public APIs (replacing many callbacks); v5 added the globe projection; v6 (2026-07-22) ships as ES modules only — the UMD bundle and default export are gone (see Update Imports and CSS below) — and changed several defaults (see the v5-to-v6 migration guide). See releases and CHANGELOG.
• Style spec: MapLibre maintains its own MapLibre Style Specification (forked from the Mapbox spec). It is compatible for most styles but has added and diverged in places; check the style spec site when using newer or MapLibre-specific features.
• Ecosystem: Besides GL JS, the MapLibre org hosts MapLibre Native (iOS, Android, desktop), Martin (vector tile server from PostGIS/PMTiles/MBTiles), and the MapLibre Tile (MLT) format. Roadmaps and news: maplibre.org/roadmap, maplibre.org/news.

Step-by-Step Migration

1. Install the Package

npm install maplibre-gl

2. Update Imports and CSS

// Before (Mapbox)
import mapboxgl from 'mapbox-gl';
import 'mapbox-gl/dist/mapbox-gl.css';

// After (MapLibre) — v6 ships ES modules only; the default export is gone
import * as maplibregl from 'maplibre-gl';
// or pull in just what you need: import {Map} from 'maplibre-gl';
import 'maplibre-gl/dist/maplibre-gl.css';

CDN: Replace Mapbox script/link with MapLibre. Don't assume Mapbox's <script src> pattern carries over unchanged — MapLibre's distributed bundle formats have changed across major versions (v6 dropped the UMD build). Check the current release notes before copying this snippet as-is:

<!-- Before (Mapbox) -->
<script src="https://api.mapbox.com/mapbox-gl-js/v*.*.*/mapbox-gl.js"></script>
<link href="https://api.mapbox.com/mapbox-gl-js/v*.*.*/mapbox-gl.css" rel="stylesheet" />

<!-- After (MapLibre, current as of v6) -->
<script type="module">
  import * as maplibregl from 'https://unpkg.com/maplibre-gl@^6.0.0/dist/maplibre-gl.mjs';
</script>
<link href="https://unpkg.com/maplibre-gl@^6.0.0/dist/maplibre-gl.css" rel="stylesheet" />

3. Replace the Namespace

Replace all mapboxgl with maplibregl (and mapbox-gl with maplibre-gl in package names or paths). Examples:

// Before (Mapbox)
const map = new mapboxgl.Map({ ... });
new mapboxgl.Marker().setLngLat([lng, lat]).addTo(map);
map.addControl(new mapboxgl.NavigationControl());

// After (MapLibre)
const map = new maplibregl.Map({ ... });
new maplibregl.Marker().setLngLat([lng, lat]).addTo(map);
map.addControl(new maplibregl.NavigationControl());

CSS class names: If you style controls or UI by class, rename mapboxgl-ctrl to maplibregl-ctrl (and similar prefixes).

4. Remove the Access Token

MapLibre does not use mapboxgl.accessToken. Remove any line that sets it.

Tile and API keys (e.g. for hosted tile services or geocoding) are configured per service, not on the map instance.

5. Replace the Style URL (Critical)

Mapbox styles (mapbox://styles/...) will not work in MapLibre. You must point the map to a style that uses non-Mapbox tile sources, sprites, and glyphs.

The simplest option is to use a style URL that does not require an API key, like OpenFreeMap. OpenFreeMap is community-funded and free to use with no API key; if your app depends on it in production, consider donating to support the project. Once you have tested and verified your migration works, you can explore the many available options (see awesome-maplibre or MapLibre Tile Sources for further suggestions).

Example:

// Before (Mapbox)
const map = new mapboxgl.Map({
  container: 'map',
  style: 'mapbox://styles/mapbox/streets-v12',
  center: [-122.42, 37.78],
  zoom: 12
});

// After (MapLibre)
const map = new maplibregl.Map({
  container: 'map',
  style: 'https://tiles.openfreemap.org/styles/liberty', // or your chosen style
  center: [-122.42, 37.78],
  zoom: 12
});

From there, you can install the MapLibre Style Specification & Utilities to validate and debug styles:

npm install --save-dev @maplibre/maplibre-gl-style-spec

Custom Mapbox styles: If you designed a style in Mapbox Studio, you cannot load it directly in MapLibre. Export the style JSON and replace Mapbox source URLs with URLs for your chosen tile source. Your styles will not render unless and until you adjust all references to the Mapbox tile schema to match the tile schema of your new tile source. In addition to updating source URLs, this means adapting the id, source, and source-layer properties in your style JSON to match the new source and layer names.

Most properties in Mapbox styles are compatible with MapLibre. Check the MapLibre Style Specification for details on supported properties and types. You can use Maputnik, MapLibre's style editor, to visually test and debug your style JSON, and MapLibre Style Spec CLI Tools to check for compatibility and other validation issues.

npx gl-style-validate style.json

6. Update Plugins (If Used)

Many Mapbox plugins work with MapLibre unchanged, and many have been forked or replaced with MapLibre-native versions. Where a MapLibre-native alternative exists, prefer it for long-term compatibility.

Check the User Interface Plugins, Geocoding & Search Plugins, and Map Rendering Plugins sections of awesome-maplibre to find compatible plugins and alternatives.

7. Replace Mapbox APIs (Search, Directions, etc.)

If your app calls Mapbox Geocoding, Directions, or other REST APIs, replace them with open or third-party services:

• Geocoding / search: Nominatim, Photon, Pelias, or MapTiler Geocoding
• Directions / routing: OSRM, OpenRouteService, Valhalla

Usage policies and sustainability: These are open or community-funded services with terms that matter in production:

• Nominatim — Requires OpenStreetMap attribution; the public instance is for testing and low-volume use only. See the Nominatim usage policy. For production workloads, self-host or use a managed provider (e.g. MapTiler Geocoding).
• OSRM demo server (router.project-osrm.org) — Explicitly not for production; no SLA or uptime guarantee. Self-host or use a managed service (e.g. OpenRouteService, MapTiler Directions) for production apps.
• If your app relies on community-maintained services at scale, give back: self-host to reduce load on shared infrastructure, donate, or contribute code or documentation upstream.

Update your code to use the new endpoints and response formats; the map layer and interaction code (e.g. adding a route line) stays the same with MapLibre.

8. What Stays the Same

Most of your map code does not change:

• Map methods: setCenter, setZoom, fitBounds, flyTo, getBounds, etc.
• Events: map.on('load'), map.on('click', layerId, callback), etc.
• Markers, popups, controls (Navigation, Geolocate, Fullscreen, Scale)
• Sources and layers: addSource, addLayer, setPaintProperty, setFilter
• GeoJSON and expressions in the style spec

So after swapping the package, namespace, token, and style (and any plugins/APIs), the rest of your logic can stay as is.

9. Translate Mapbox v2-only APIs, Do Not Look for Them

Mapbox GL JS v2 methods that arrived after the fork are not in MapLibre under their Mapbox names, and no MapLibre release adds them. Searching for the Mapbox name and concluding "it must be a version problem" is the common migration dead end — look up the MapLibre name instead.

// Mapbox GL JS v2
map.setFog({ 'horizon-blend': 0.3, color: '#ffffff' });

// MapLibre GL JS — the same idea, different property names
map.setSky({
  'sky-color': '#199EF3',
  'horizon-color': '#ffffff',
  'fog-color': '#0000ff',
  'fog-ground-blend': 0.5,
  'horizon-fog-blend': 0.5,
  'sky-horizon-blend': 0.5,
  'atmosphere-blend': 1.0
});

Verify any other v2 method against the Map API reference before assuming an upgrade will restore it.

Checklist

• Uninstall mapbox-gl, install maplibre-gl
• Replace imports and CSS (mapbox-gl → maplibre-gl)
• Replace all mapboxgl with maplibregl (and CSS classes mapboxgl- → maplibregl-)
• Remove mapboxgl.accessToken
• Set style to a non-Mapbox URL (hosted or your own style)
• Replace incompatible Mapbox plugins with MapLibre or open alternatives
• Replace Mapbox Geocoding/Directions with Nominatim, OSRM, or other open alternatives
• Replace Mapbox v2-only APIs (setFog → setSky, free camera → calculateCameraOptionsFromCameraLngLatAltRotation + jumpTo/easeTo/flyTo)
• Test map load, controls, and any API-driven features

Related Skills

• maplibre-tile-sources — Choosing a source type for your data
• maplibre-pmtiles-patterns — Serverless tiles with PMTiles

Sources Used for This Skill

These sources were used when creating this skill. You may want to involve contributors who maintain or have contributed to them:

1. MapLibre official migration guide — maplibre.org/maplibre-gl-js/docs/guides/mapbox-migration-guide/ — Primary step-by-step reference (package, namespace, CSS, CDN).
2. MapLibre GL JS documentation — maplibre.org/maplibre-gl-js/docs/ — API and concepts.
3. MapLibre Style Specification — sky — maplibre.org/maplibre-style-spec/sky/ and Map.setSky — the atmosphere properties that replace Mapbox's fog; Map.calculateCameraOptionsFromCameraLngLatAltRotation and CameraOptions — the camera-position path that replaces Mapbox's free camera.
4. MapLibre GL JS GitHub — github.com/maplibre/maplibre-gl-js — README, releases, and fork history.
5. mapbox-agent-skills — The mapbox-maplibre-migration skill (Mapbox repo) covers the reverse direction (MapLibre → Mapbox). Topic structure and comparison elements were adapted for this Mapbox → MapLibre skill. Copyright (c) Mapbox, Inc. for adapted portions.
6. This repo’s skills — maplibre-tile-sources, maplibre-pmtiles-patterns; maplibre-open-search-patterns and maplibre-geospatial-operations not yet in repo — for tile source and service alternatives after migration.

This skill is a snapshot. Where a primary source contradicts it — the References above, MapLibre's current documentation, or what MapLibre does when you run it — that source wins. Follow it, then report the disagreement, citing the source and your MapLibre version: editing your installed copy helps no one else and is overwritten on the next update.