Mapbox Migration 2026 — check your code for free

MapLibre migration check for Mapbox GL JS v2+ code: flags the proprietary mapbox-gl dependency, tokens, mapbox:// styles, CDN tags and plugins, with the maplibre-gl fix for each line. Runs entirely in your browser — nothing is uploaded.

// store-locator.js: the map on /stores, still on Mapbox GL JS v3
import mapboxgl from 'mapbox-gl';
import 'mapbox-gl/dist/mapbox-gl.css';
import MapboxGeocoder from '@mapbox/mapbox-gl-geocoder';
import MapboxDraw from '@mapbox/mapbox-gl-draw';

mapboxgl.accessToken = 'pk.eyJ1Ijoic3RvcmVzIiwiYSI6ImNsZGVtbzAwMSJ9.sample';

export function initStoreMap(container, stores) {
  const map = new mapboxgl.Map({
    container,
    style: 'mapbox://styles/mapbox/streets-v12',
    center: [-73.99, 40.73],
    zoom: 11
  });

map.addControl(new mapboxgl.NavigationControl(), 'top-right');
  map.addControl(new MapboxGeocoder({ accessToken: mapboxgl.accessToken, mapboxgl }));
  map.addControl(new MapboxDraw({ displayControlsDefault: false }));

map.on('load', () => {
    map.setFog({ color: 'rgb(220, 230, 240)', 'horizon-blend': 0.1 });
    map.addSource('buildings', { type: 'vector', url: 'mapbox://mapbox.mapbox-streets-v8' });
    map.addSource('stores', { type: 'geojson', data: stores });
    map.addLayer({ id: 'stores', type: 'circle', source: 'stores', paint: { 'circle-radius': 6 } });
  });

for (const s of stores.features) {
    new mapboxgl.Marker().setLngLat(s.geometry.coordinates).addTo(map);
  }
  document.querySelector('.mapboxgl-ctrl-top-right').classList.add('store-controls');
  return map;
}

export async function staticThumb(lng, lat) {
  const url = `https://api.mapbox.com/styles/v1/mapbox/streets-v12/static/${lng},${lat},14/300x200?access_token=${mapboxgl.accessToken}`;
  return fetch(url);
}

as of

Free here: every Mapbox GL JS v2+ line in the pasted file, with why it bills or breaks and the MapLibre fix, free and offline. Full version (VS Code): scan the whole workspace in one pass and export one migration report for the pull request. · $29 once · one licence key per person or team seat. Mapbox bills $950 a month at 300,000 map loads.

Same engine as the VS Code extension, byte for byte.