How to cut an MP4
- Drop the .mp4 file into the box.
- Drag the handles around the part you want to keep, or type the start and end time.
- Click ✂ Cut video and download the new MP4.
Lossless MP4 cutting
An MP4 contains already-compressed video. Most online cutters decode and re-encode the whole file, which takes time and costs quality. In the default Fast mode this cutter copies the compressed data between your cut points straight into a new MP4 — the picture is bit-for-bit the same as the original, and a 1 GB file is done in seconds.
Fast or precise?
- Fast (default) copies the video data as it is: no quality loss and done in seconds, even for long videos. Video is stored in groups of frames that start with a key frame, so the cut snaps to the key frame just before your start point — usually within a second or two. Your end point is exact enough for almost every use.
- Precise re-encodes the video so the cut lands on the exact frame you chose. Use it when every frame counts, for example to cut a clip on a beat. It takes longer and re-compresses the video at high quality.
Cutting several parts?
Cut each part separately (the source stays loaded, so just move the handles and cut again). To put clips together or do more editing, an editor works better — if you edit in CapCut, see how to move your project to DaVinci Resolve.
Other MP4 tools: compress MP4, MP4 to MP3, MP4 to GIF and MOV to MP4.
Private by design
The video is cut inside your browser with the WebCodecs engine of Chrome, Edge, Safari or Firefox. It is never uploaded, so even long or personal videos stay on your device.
Frequently asked questions
Can I cut an MP4 without losing quality?
Yes. Fast mode copies the video data without re-encoding, so the quality is identical to the original.
How big can the MP4 be?
There is no fixed limit; files of several gigabytes work on most computers because the data is copied, not re-encoded.
Can I keep a part from the middle?
Yes. Set both the start and the end handle; everything outside the selection is removed.
Is my MP4 uploaded?
No. It is cut in your browser and never leaves your device.