A Type O plug in Denmark?

Not directly — pack an adapter.

your Type O
🇩🇰 Type K socket
🇩🇰 Type C socket
🇩🇰 Type E socket
🇩🇰 Type F socket

Denmark's Type K / Type C / Type E / Type F sockets don't take a Type O plug. A plug adapter solves the shape problem — it changes pins, not electricity. The wall delivers 230 V at 50 Hz (207–253 V within tolerance) — if your device isn't rated for that (look for "100–240 V" on the brick), an adapter won't save it.

Grid facts verified against IEC World Plugs — Denmark. Physical-fit verdicts derive from pin geometry and each socket standard's acceptance list — not safety advice.