Video Merger

Join several clips into one video without leaving your browser. Set the running order, pick the output size and export a single MP4.

Add your videos

MP4 · WebM · MKV · MOV · AVI

Drop videos here or click to browse

Add two or more clips, then arrange them in the order you want

MP4WebMMKVMOVAVI

Keep each file under 500 MB. Everything is merged locally in your browser, so nothing is uploaded.

Result

Add videos to start

Your merged video will appear here

How to merge videos

Add your videos

Drop two or more clips into the upload area. The FFmpeg engine loads on first use.

Order the clips and pick a size

Use the arrow buttons to set the running order, then choose the output resolution.

Merge and download

Hit Merge videos and download the joined MP4 when it is ready.

Why use Aihangsoft Video Merger

Clips stay in your order

Move any clip up or down with the arrows and the merged video follows the list from top to bottom.

Fits every source

Clips of different sizes or aspect ratios are centred and padded to the output frame, never stretched.

100% private

Merging runs locally in your browser. No server, no queue, no uploads.

What happens during a merge

Matching output settings

Every clip is re-encoded once to the same resolution, frame rate, video codec, audio codec and sample rate. That is what allows clips from different sources to play as one continuous file.

Use case: footage from different phones, cameras and screen recorders

Padding instead of stretching

A clip that does not match the output frame is scaled down to fit and centred with black bars. Faces, text and logos keep their real proportions.

Use case: mixing landscape and portrait clips in one video

Adjustable output size

Keep the resolution of the first clip, or bring every clip down to 720p or 480p for a smaller file that is easier to send and upload.

Use case: social uploads, email attachments, slow connections

One encode per clip

Each clip is encoded once while it is prepared, then the final join copies the prepared streams. No second encode, no extra generation loss.

Use case: long playlists of clips that all need to match

Related tools

Video Trimmer

Cut each clip before you merge

Video Compressor

Shrink the merged file

Video Converter

Re-encode a clip to another format

Video merging FAQ

Yes. Clips usually come from different cameras and apps, so each one is re-encoded to the same resolution, frame rate and audio settings before they are joined. That is what makes the result play as one smooth file.
Yes. Any clip that does not match the output frame is scaled down and centred with black padding, so nothing is stretched out of shape.
They are joined from top to bottom of the list. Use the arrow buttons on a file to move it up or down before you merge.
There is no fixed limit, but every clip is held in your browser memory. Files under 500 MB each work comfortably on most machines. Merging also takes longer than trimming, because every clip is re-encoded once before the join.
Never. FFmpeg runs inside your browser through WebAssembly, so your files never leave your device. There is no upload, no server and no queue.

Merge your clips now

Free, private and unlimited. No account needed.

Upload videos