Meet Trimster, the video barber for macOS

Trimster is the easy way to save clips from an MPEG-4 video.
Set your start point, set your end point, and save. It’s that simple.

Screenshot of Trimster

Features

So easy, yet so precise.

Split a long video into shorter clips, remove scenes you don’t want, or shave a little off the top.
Your trimmed clip is saved as a new file, and it’s fast because there’s no conversion or re-encoding.

Made for MPEG-4

You can trim any unprotected, exportable MPEG-4 video. Compatible extensions include MP4, M4V, MPG, MPEG, and MOV.

Simply Powerful

The simple and streamlined interface has everything you need for precise trimming. Keyboard shortcuts make it a breeze.

Save the Date

Want your saved clip to have the original file’s created and modified timestamps? Or its Finder tags? Both options are in Settings.

Detail oriented

Enable the detail overlay for at-a-glance information about the source video and the exact location of the playhead.

Keyboard Shortcuts

There’s a key for that.

Every action is at your fingertips — literally.
Press a highlighted key below to learn about its shortcut.

` 1 Press ⌘1 for a compact window size. 2 Press ⌘2 for a medium window size. 3 Press ⌘3 for a large window size. 456789 0 Press ⌘0 to size the window to match the video dimensions. -= delete Press Delete to clear the in/out points and start over. tab qwer tyu i Press i to mark the “in” point where the trimmed clip will start. Press ⌘i to toggle the details overlay with information about the video and playhead position. o Press o to mark the “out” point where the trimmed clip will end. Press ⌘o to open a video. p[] \ caps lock a s Press ⌘s to save a copy of the video from the in point to the out point. dfg hjkl ;'return shift z Press z to hide the controls at the bottom so you can see the entire video. Press the key again to show the controls. All actions still work while the controls are hidden. xcvb nm,. / Press / to play the video between the in and out points. shift fn⌃⌥⌘ Press Space to play or pause the video. ⌘⌥ ◀ Press ◀ to rewind 1 frame. Press ⌥◀ to rewind 1 second. Press Shift◀ to move the playhead to the “in” point. Press fn◀ (Home) to move the playhead to the start of the video. ▲▼ ▶ Press ▶ to advance 1 frame. Press ⌥▶ to advance 1 second. Press Shift▶ to move the playhead to the “out” point. Press fn▶ (End) to move the playhead to the end of the video.

Support

Got questions? We’ve got answers! (probably)

Browse some common questions and helpful topics below.

Why won’t Trimster open my MP4 file?

The MP4 format is a container that can hold various types of audio and video data. Most likely, your MP4 contains a video format that can’t be natively edited, so Trimster can’t open it. You can use a tool like Handbrake to convert the video to MP4 using the H.264 encoder, then Trimster will be able to open it.

Still wondering about something?
Get in touch or visit our support forums.

Get Trimster

Take a little off the top.

Or off the beginniing. Or off the end. Or wherever.