What's the difference between the two cut styles?

Lossless copies the original streams, so it finishes in seconds and the quality is untouched — but the cut lands on the nearest keyframe before your start point. Frame-exact re-encodes, which is slower but starts precisely where you asked.

Is there a file size limit?

No hard limit, but the engine holds the video in memory — stay under about 1 GB on desktop and 300 MB on mobile browsers.

Does the video get uploaded?

No — trimming happens entirely in this tab.

Trim Video Online — Lossless Cuts, No Upload

Cut a clip out of any video in your browser: a thumbnail timeline, lossless keyframe cuts that finish in seconds, or frame-exact re-encode when you need precision.