How to merge video clips
Put two or more readable clips in the order you want, then check how their streams will be joined before exporting. The timeline preview shows each clip's relative duration. The compatibility report explains whether the selected settings allow stream-copy or require re-encoding.
- Add two or more files in
Drop video clips hereor clickbrowse files. - Change the sequence by dragging rows, using
Move uporMove down, or removing a row withRemove. - Review
Timeline preview, then choose theOutput format,Resolution,Frame rate,Video quality, andAudio bitrate (when re-encoding). - Select
Back-to-back - no fadeorFade through black (video) + audio fade. - Choose the compatibility mode, read the report, click
Merge, and selectDownload merged video.
How clip order affects the merged file
The output places each accepted clip after the previous one. The merge does not overlay tracks, stabilize footage, or trim content automatically. Each block in Timeline preview represents one clip, and its width follows that clip's duration.
part1.mp4 + part2.mp4
order: part2.mp4, part1.mp4
output: merged.mp4Files without a readable video track are marked as errors and excluded. Empty files are filtered out before probing. Unsupported or corrupt video data can fail while the tool reads the file.
What each output setting changes
Output formatselectsMP4 (H.264 / AAC)orWebM (VP9 / Opus).Resolutionkeeps the first clip's size or sets480p,720p,1080p, or1440p.Frame ratekeeps the first clip's rate or sets24 fps,25 fps,30 fps, or60 fps.Video qualityselects Low, Medium, High, or Very high for re-encoded output.Audio bitrate (when re-encoding)selects96 kbps,128 kbps,192 kbps, or256 kbps.
What triggers re-encoding
Auto - stream-copy when every clip already matches, re-encode otherwise uses stream-copy when the checked video and audio properties match, the clips share resolution and frame rate, and the selected output format fits the source video codec family. The report gives the reason when a check fails.
Always re-encode using the settings above forces re-encoding. A chosen Resolution, chosen Frame rate, or enabled fade also forces it. Video quality and Audio bitrate (when re-encoding) apply to re-encoded output.
How fades and audio are handled
Back-to-back - no fade is selected initially, so clips meet at a hard cut and content is not trimmed automatically. With Fade through black (video) + audio fade, the entered duration is applied at each boundary, and the merge re-encodes.
If at least one accepted clip has audio, the tool inserts silence for clips without an audio track. If every clip lacks audio, the merged file has no audio track. The original clips are read and never modified.
What to check before downloading
For a mixed set of clips, read the compatibility report before clicking Merge. It can identify different video codecs, resolutions, frame rates, audio codecs, sample rates, channel counts, or audio-track presence. Select Always re-encode using the settings above when you want the chosen output settings applied to every clip.
The merge report lists each clip's duration, dimensions, video codec, and audio status. It also records whether the result used stream-copy or re-encoding, the selected boundary treatment, and any inserted silence.
Where the files are processed
Video Merger reads the selected files in your browser and processes them with its local video engine. The files do not leave your device. For other ways to join clips, see Video Merge Tools.
Frequently asked questions
How do I merge video clips into one file?
Add at least two readable clips, arrange them, choose the output settings, and click Merge. Preview the result, then select Download merged video.
Can I join video clips in a different order?
Change the order by dragging rows or using Move up and Move down. The Timeline preview shows the resulting sequence.
Will Video Merger re-encode my files?
It depends on the compatibility checks and your selections. Auto can use stream-copy when the clips match. A mismatch, a fade, a specific resolution or frame rate, or Always re-encode using the settings above produces re-encoded output.
What happens if one video clip has no audio?
When another clip has audio, the tool inserts silence for the clip without an audio track. If every clip lacks audio, the merged output has no audio track.
Are my local video files uploaded?
The files are read by the local video engine in your browser and do not leave your device.