Microsoft App GUID Lookup
Look up first-party Microsoft application IDs seen in sign-in logs and token claims — appid → name, instantly.
✓ runs 100% in your browser — no data leaves this pageCurated subset of well-known Microsoft first-party app IDs (42 entries). Full dataset & attribution: merill/microsoft-info.
Frequently asked
Where do these GUIDs come from?
This page carries a curated subset of well-known first-party app IDs. For the exhaustive community-maintained list, see merill's microsoft-info project (aka.ms/AppNames) — linked below.