What gets cut besides “um”
The detector flags um, uh, uhh, umm, er, ah, eh, uhm, erm, and close variants. It also flags phrases such as you know and I mean, and it treats “like” as a filler only when it is not a real verb or comparison (“I like this” stays). That is more than a search-and-replace on the captions file: cuts follow word start and end times, including the pause in front of the um.
Compared with CapCut, Premiere, and Descript
CapCut’s “identify filler words” and Premiere’s manual ripple deletes work, but they live inside an editor you have to install or subscribe to. Descript ranks for “remove um from video” with a dedicated tool page, which is the right shape — one job, one URL. This page is the same idea without an account: process in the tab, keep what you want, download if you need a file. It will not replace a full NLE. It will take the ums out of a 6-minute talking-head clip.
Keep the ums that are doing work
Sometimes an um is a beat, not a mistake. After Process, every flagged word is clickable. Restore the ones that belong in the performance. If the detector missed a stall, open the word and cut it. The preview skips the cuts immediately; you are not waiting on an export to hear the result.