Is Leaflet 100% free?

if you go to doc example , you will see :

var mymap = L.map('mapid').setView([51.505, -0.09], 13);

L.tileLayer('https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw', {
    maxZoom: 18,
    attribution: 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, ' +
        '<a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, ' +
        'Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
    id: 'mapbox.streets'

Which means that the tiles are supplied by mapbox.

  • *Which means that in this example the tiles are supplied by Mapbox. – peeebeee Jul 12 '18 at 8:27

Leaflet is free ($) and open, with a minimal requirement of keeping the license should you redistribute it.

Leaflet is a library that lets you display - and more - data. It is not a data provider.

Mapbox, OSM and others are data providers/distributors and have their own restrictions / attribution requirements.

So to answer your question, yes, Leaflet is free. Mapbox describe their free/paid offers here.

  • 10
    To add to this answer; You are not obligated to use MapBox layers in a Leaflet Map. you can use any provider or make your own which follow the XYZ standard. Here is a plugin which shows how you can add a wide variety of layers: leaflet-extras.github.io/leaflet-providers/preview – Devdatta Tengshe Jul 10 '18 at 3:49
  • As Devdatta Tengshe has mentioned before, Leaflet uses so called the de facto XYZ Standard, which obeys following scheme: 'http://{s}.somedomain.com/blabla/{z}/{x}/{y}{r}.png'. Mostafa, you can find more information in Leaflet documentation. – Taras Jul 10 '18 at 12:03

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