Video · Merge Videos
Portrait, landscape, MKV or MOV: it all ends up as one video.
Mix MOV, MP4, MKV, AVI, MTS and more, in any size or orientation. Clips are fitted with bars rather than stretched, and silent ones get silence so the sound stays in sync.
One-time purchase · macOS 26 Tahoe or later, Apple silicon recommended
- 1Intro.mov1920 × 1080 · 0:12
- 2Interview.mp41920 × 1080 · 2:30
- 3Phone clip.MOV1080 × 1920 · 0:41
- 4Outro.mov1920 × 1080 · 0:25
Different sizes are fitted with bars, never stretched. Silent clips get silence.
How it works
Three steps, start to finish.
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01
Open Merge Videos
Press ⌃⌥Space and type “join videos”, or pick it from MightyBench’s menu bar icon.
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02
Drag clips into order
Drop in your clips and drag them into order. Set the Frame size (Largest clip or a preset), a Frame rate of 24, 30 or 60 fps, and a File name.
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03
Press Merge Videos
One MP4, named as you chose, arrives in a new dated folder in Downloads › MightyBench. Every source clip is left as it was.
The details
Small things, done properly.
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Bars, never stretching
Clips of different sizes and orientations are fitted into the frame with bars, so nothing ends up squashed.
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Sound stays in sync
Silent clips are given silence, so the soundtrack stays in sync from the first clip to the last.
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One frame rate throughout
Everything is brought to 24, 30 or 60 fps and one format, so the merged video plays back smoothly.
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Mix formats freely
MOV, MP4, M4V, MKV, WebM, AVI and MTS can all go into one merge, in whatever order you drag them.
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Choose the frame size
Match the largest clip, or pick a preset frame size for the finished video.
Specs
Merge Videos, at a glance.
Many clips, one video.
| Opens | MOV, MP4, M4V, MKV, WebM, AVI, MTS, mixed freely |
|---|---|
| Saves as | One MP4 (H.264, AAC) |
| Settings |
|
| Needs | FFmpeg, installed in one click |
| Originals | Never changed |
| Saved to | Downloads › MightyBench › date Merge Videos |
FAQ
Questions about Merge Videos
Anything else? Email support@mightybench.com and a person will reply.
How do I combine videos on a Mac?
Open Merge Videos, drop in your clips, drag them into order and press Merge Videos to get a single MP4.
Can I merge videos of different sizes or orientations?
Yes. Clips are fitted into one frame size with bars, never stretched, so portrait and landscape footage can share the same video.
What happens to clips without sound?
They’re given silence, so the soundtrack stays in sync all the way through the merged video.
Can I mix MKV, MOV and MP4 in one merge?
Yes. MOV, MP4, M4V, MKV, WebM, AVI and MTS can be mixed freely. Everything is brought to one frame rate and format for smooth playback.
Which extra software does it use?
FFmpeg. MightyBench installs it through Homebrew in one click, or you can point MightyBench to your own copy.
Can I choose the frame rate?
Yes: 24, 30 or 60 fps. You can also match the largest clip’s frame size or pick a preset.
Plus forty-eight other tools.
Merge Videos comes with every other MightyBench tool: video, audio, images, PDFs and on-device AI in one native Mac app. Pay $39 once for one Mac, with every MightyBench 1.x update included.
One-time purchase · macOS 26 Tahoe or later, Apple silicon recommended