Leaflet

Business Profile

Core Value Proposition

Leaflet provides a lightweight open-source JavaScript library for mobile-friendly interactive maps.

Target Customer

Web developers and GIS practitioners building interactive maps for websites and apps.

Key Differentiator

Extremely lightweight (~42 KB of JS), easy-to-use API, strong plugin ecosystem, no external dependencies, cross-platform performance, and mobile-friendly design.

Implementation Timeline

No explicit customer deployment timelines provided. Notable development updates include Leaflet 2.0 Alpha released (May 18, 2025) with major modernization and ES module support.

Pain Points

1Need for a lightweight, fast library to render mobile-friendly interactive maps with minimal footprint.
2Desire for a simple, well-documented API that developers can extend via plugins and custom layers.
3Requirement for cross-platform compatibility without heavy dependencies or vendor lock-in.

Key Features

1Out-of-the-box layers: Tile layers, WMS; Markers and popups; Vector layers (polylines, polygons, circles, rectangles); Image overlays; GeoJSON.
2Interaction: Drag panning with inertia; Scroll wheel zoom; Pinch-zoom on mobile; Double-click zoom; Keyboard navigation.
3UI and customization: Map controls (zoom, attribution, layer switcher, scale); Pure CSS popups and controls; Image- and HTML-based markers; Custom map layers and controls.
4Performance and rendering: Retina resolution support; Hardware acceleration on mobile; Efficient polyline/polygon rendering with dynamic clipping; Modular build system to include only needed features.
5Projections and extensibility: Custom map projections (EPSG:3857/4326/3395 out of the box); Modular, extensible architecture with plugins.

Target Customer Industries

Client Results

1Trusted and adopted by major brands and organizations, including GitHub, Foursquare, Pinterest, Facebook, Evernote, Etsy, Flickr, 500px, Data.gov, European Commission, The Washington Post, Financial Times, NPR, USA Today, National Park Service, IGN.com, and OpenStreetMap.

Competitive Advantages

1Very lightweight footprint (~42 KB of JavaScript).
2Open-source with a large plugin ecosystem for extensibility.
3No external dependencies, simplifying integration.
4Cross-browser and mobile-friendly with good performance characteristics.
5Retina-resolution support and a clean, extensible API.
6Pure CSS-based customization for markers and controls.
7Modernized in 2.0 alpha with ES modules and pointer events for newer workflows.

Key Benefits

1Small footprint and fast performance

2Open-source with extensive plugin ecosystem

3Extensible with custom layers and controls

4No external dependencies

5Cross-platform, with strong mobile support and retina readiness

Additional Product Information

Product Description

Leaflet is a JavaScript library for mobile-friendly interactive maps. It is an open-source library designed to be lightweight, simple to use, and highly extensible.

Target Market

Developers and organizations needing to build interactive maps for websites and applications, including GIS-focused use cases.

Unique Value Proposition

A small, open-source, highly extensible mapping library optimized for mobile-friendly interactivity with an easy-to-use API and a broad ecosystem of plugins.

Technical Requirements

No external dependencies; supports modern browsers; 2.0 alpha introduces full ES module support and Pointer Events; advising migration to module-based usage for Leaflet 2.0+.

Pricing Model

Open-source (free to use); specific licensing not explicitly stated in the provided content.

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