About Merge Videos
Stitch multiple video clips into a single file, in the exact order you want, with consistent resolution and frame-rate handling.
How merge videos works
Joining videos together is harder than it looks because real-world clips rarely share the same parameters. One might be 1080p at 30 fps from a phone, another 720p at 60 fps from a screen recorder, another 4K from a camera. A naive merger that just concatenates them produces a file with timing glitches, audio drift, or playback errors.
NextConvert normalises every input on the way in: matching resolution to the largest common size, conforming frame rate, and re-sampling audio to a single sample rate and channel layout. The result is a single seamless file that plays correctly everywhere, with no jumps, no audio desync, and no broken thumbnails.
When all your inputs already share the same parameters (for example, several clips off the same camera), we skip the normalisation step and concatenate directly. That path is essentially lossless and finishes in seconds.
When to use it
Compilation videos
Build a highlights reel, a fail compilation, or a multi-take blooper roll from individual clips.
Course or tutorial assembly
Combine intro, lesson, and outro segments into the final published lesson.
Travel or event recap
Stitch together short phone clips from a trip or wedding into one shareable video.
Multi-camera footage
Sequence cuts from different angles into one continuous video before further editing.
Supported formats
Input
Output
Step-by-step guide
- 1
Upload clips
Drop multiple files in. You can also add more after the first batch. The queue keeps growing until you’re ready.
- 2
Reorder
Drag the cards to reorder. The numbers on each card show the position in the final video.
- 3
Merge and download
Click Merge. We normalise the streams (only when needed) and produce a single output file you can download or share.
Tips for the best result
- For the cleanest result, record all clips with the same camera settings. Mixing 24, 30, and 60 fps forces a conform step that occasionally produces juddery motion in the lower-fps clips.
- If a clip’s audio levels differ wildly from the others, consider running each through our noise reduction or normalisation pass first.
- Adding a quick transition is easier in a dedicated editor. Merge here, then drop the result into iMovie or CapCut for fades if you need them.
Privacy and security
Files are uploaded to our processing servers over an encrypted connection and removed automatically after the job completes (usually within a few hours). We never share your media or train models on it. You can also delete a job manually at any time from your dashboard.
Read our full privacy policy for retention timelines and our list of subprocessors.