How Can I Cut a MP4 Video File in Windows 11

LosslessCut is an open-source, portable video editor. As an efficient offline tool, it cut mp4 files without re-encoding any video data. Its lossless stream copying technology fully preserves the original video quality and supports precise timestamp-based trimming, allowing you to quickly extract short clips.

How to Cut MP4 file

Step 1: Download the portable version of the software; no installation required

Step 2: Launch the program, then drag and drop your MP4 video

Step 3: Locate the start position of the clip: drag the timeline slider or play the video to the desired timestamp

Step 4: Press the { button to mark the start point of the cut

Step 5: Move the timeline to the end position of the clip you want to keep

Step 6: Click the } button to set the end point of the clip

Step 7: Click the Export button to open the export panel

Step 8: Select the “Copy Output” mode to enable lossless stream copying and preserve the original video quality

Finally, select a local storage path and save the trimmed MP4 video file

The software can perform lossless trimming on standard-length videos. It eliminates the quality loss caused by re-encoding and provides precise, frame-level trimming capabilities for users who only need to split or extract MP4 clips.

Pros

• Open-source software with no watermarks and no feature restrictions
• Lossless editing—no re-encoding required, so the original video quality remains intact
• Supports ultra-precise timestamp positioning for accurate clip splitting

Cons

• No native batch trimming feature; multiple MP4 files must be processed manually one by one
• Lacks advanced editing tools such as filters, text overlays, and frame rate adjustment
• Exported clips retain the original large file size; no built-in compression feature
• Export may fail for complex multi-track MP4 videos containing incompatible codecs