Whenever I have some time, I keep improving OSM Spyglass. A very useful addition is that Spyglass now shows suggestions for the key and value filter fields. Spyglass gets possible keys/values from the data currently loaded and will show all keys/values matching what you have typed so far.

Two years ago or so I started the OSM XRAY project, later I wrote about it in this blog post. Since then I have renamed this project to “OSM Spyglass” and I have kept working on it on and off.

This blog post is about the new OSM XRAY service. [Update April 2026: This service has since been renamed to Spyglass]. You can find a demo here. It uses vector tiles with all OSM data to really show all of OSM, mostly for debugging. But it is also interesting to just explore what’s there.