Polyline Encoder / Decoder
Encode and decode Google Polyline format.
🔒 All processing happens locally in your browser. Your coordinates never leave your device.
One coordinate per line: lat,lon
How It Works
Google's Polyline encoding compresses coordinate paths into ASCII strings using delta encoding and variable-length encoding. This reduces the data size significantly for transmitting routes and paths.
Privacy: Pure algorithmic encoding/decoding in JavaScript. No network requests.