AutoCAD is a memory hog. The longer your session runs and the heavier your drawings, the more RAM it holds onto — even after you close files. Eventually you hit "Out of memory", sluggish redraws, or a crash. This guide shows how to do a free AutoCAD memory cleanup and keep CAD fast without restarting.
AutoCAD doesn't always return RAM to the system after tasks like regen, undo, or working with xrefs and large 3D models. Over a long session this "wasted" memory piles up, and the only thing that reliably clears it is a full restart — which means lost work state and downtime.
-purge repeatedly to catch nested items) removes unused blocks, layers, and styles.These help, but they're manual and don't address the live, accumulated memory during active work.
CadMemFree runs inside AutoCAD and reclaims idle RAM automatically — no restart, no file risk. The free tier gives 14 days of full features, then 10 automatic cleans per day plus 10 manual cleans per day, forever.
LICENSE to start the 14-day trial — no card needed.Yes — the free tier offers 10 manual cleans per day and is free forever.
No. It only releases unused memory; it never touches your drawing data.
Yes. Activation is RSA-signed and works fully offline.
Ready to stop AutoCAD lag? Download CadMemFree free or see pricing.