Free Online Coordinate Conversion Tool (WGS84 ↔ Web Mercator)

Quickly convert between WGS84 (Latitude/Longitude) and Web Mercator (EPSG:3857) coordinates with our free, no-dependency tool. Perfect for GIS mapping, web development, and geospatial analysis.

🔗 Try the Free Converter Now 

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🔹 Key Features

✅ Two-Way Conversion – Switch between WGS84 and Web Mercator with one click
✅ No Dependencies – Works offline, no libraries or API keys needed
✅ Precision Control – Supports 6+ decimal places for accurate results
✅ Input Validation – Checks for valid coordinate ranges
✅ Mobile-Friendly – Works on all devices

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🔹 How to Use the Converter

1. WGS84 (Lat/Lon) → Web Mercator (EPSG:3857)

• Step 1: Enter Latitude (e.g., 37.422)
• Step 2: Enter Longitude (e.g., -122.084)
• Step 3: Click “Convert to Mercator”
• Result: Get X (Easting) and Y (Northing) in meters

📌 Example:

• Input: Lat: 48.8584, Lon: 2.2945 (Eiffel Tower)
• Output: X: 255966.53, Y: 6251439.87

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2. Web Mercator (EPSG:3857) → WGS84 (Lat/Lon)

• Step 1: Enter X (Mercator) (e.g., -13580745.58)
• Step 2: Enter Y (Mercator) (e.g., 4496777.28)
• Step 3: Click “Convert to WGS84”
• Result: Get Latitude & Longitude in decimal degrees

📌 Example:

• Input: X: -13580745.58, Y: 4496777.28 (Google HQ in Mercator)
• Output: Lat: 37.422000, Lon: -122.084000

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🔹 Common Use Cases

🌍 Web Mapping – Convert coordinates for Google Maps, Leaflet, or Mapbox
🗺 GIS Analysis – Prepare data for QGIS, ArcGIS, or Python (geopandas)
📱 App Development – Integrate into Android/iOS location services
🚗 Navigation Systems – Convert GPS data for routing applications

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🔹 Frequently Asked Questions (FAQs)

❓ What is WGS84?

• The World Geodetic System 1984 (WGS84) is the standard GPS coordinate system (Latitude/Longitude).

❓ What is Web Mercator (EPSG:3857)?

• The projection used by Google Maps & OpenStreetMap, measured in meters from a reference point.

❓ Does this tool work offline?

✅ Yes! No API or internet connection required.

❓ Can I convert batch coordinates?

⚠️ Currently single-point only, but we’re working on a bulk converter.

❓ Why do Y values in Mercator exceed 90° latitude?

• Due to projection distortion near poles (Y approaches infinity at 90°).

❓ Is this tool free?

✅ 100% free – No signup, no limits.

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🔹 Try It Now!

🔗 Convert Coordinates Now

Need advanced features? Check out our API for Developers.