HERE Route v8 Decoder it’s a simple tool to validate, decode, visualize, and convert HERE Routing API v8 responses, including polyline geometry and all route sections, directly on an interactive map.
About this tool
HERE Route v8 Decoder is a developer-friendly tool designed to inspect, debug, and convert complete HERE Routing API v8 responses.
You can paste a full routing response into the editor, and the tool will automatically validate the JSON structure, detect incorrect formatting, and display detailed error messages to help you identify issues quickly.
When the response is valid, the application decodes all available Flexible Polyline geometries across every route section and renders them on an interactive Leaflet map. Multiple sections are displayed in different colors, and the tool automatically merges them into a single continuous line when needed. The entire decoded geometry can be exported as clean GeoJSON, with support for both LineString and MultiLineString, depending on the structure of the input route.
In addition to visualization, the tool includes conversion HERE Flexible Polylines to GeoJSON.
Convenient one-click actions allow you to copy results to the clipboard, save them as files, or clear the editor. The interface also shows inline alerts to guide the user through validation errors, formatting issues, or incomplete route data.
Overall, HERE Route v8 Decoder provides a fast, intuitive, and powerful environment for exploring routing responses, debugging API output, converting geometry, and preparing location-based data for further use in your own applications.