Trimster
The MPEG-4 Video Barber
Only for Mac
$1.99
Mac
Trim MPEG-4 videos with ease and precision.
Trimster is the easy way to trim MPEG-4 videos with precision. Set “in” and “out” points, then save the clip. It’s that simple.
You can use Trimster to split a long video into shorter clips, remove scenes you don’t want, or just trim a little off the top. Trimming MPEG-4 videos is quick and easy but oh-so-precise: set your exact “in” and “out” frames, then save the clip as a new video. Trimster doesn’t convert or re-encode movies, so saving trimmed clips is easy and fast. If you want, the new clip can even retain the created/modified dates and Finder tags from the original file.
Use standard movie player controls and menu items to mark your desired in/out clip points, or take advantage of convenient keyboard shortcuts:
– Step frame-by-frame using the left/right arrows keys for precise trimming
– Step second-by-second using Option + left/right arrow keys
– Mark in/out points with I and O keys
– Other keys let you jump to the beginning/end of the video or marked clip
Trimster works with any unprotected, exportable MPEG-4 movie. Compatible file extensions include MP4, M4V, MPG, MPEG, and MOV. Trimster doesn’t work with MPEG-2 files or other video formats, but if you use another utility to convert them to MP4, you can then trim them with Trimster.
- This app hasn’t received enough ratings or reviews to display an overview.
– Minor UI adjustments make it easier to use the play track and see in/out time codes.
– Press Command-I to see details about the video, including the precise playhead location.
– In Settings, you can now choose to copy Finder tags from the source video to the saved clip.
– Under the hood, improved code takes advantage of modern Swift and SwiftUI conventions.
The developer, Wells Consulting LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Wells Consulting LLC
- Size
- 1.4 MB
- Category
- Photo & Video
- Compatibility
Requires macOS 26.0 or later.
- Mac
Requires macOS 26.0 or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2019–2026 Wells Consulting

