framekit

Arrange / Local browser tool

Merge videos.

Put clips in a chosen order and create one continuous video file.

01 / SourceAwaiting file

At a glance

Merge videos: key facts

Framekit joins two or more compatible videos in the displayed order into one MP4. Different dimensions, frame rates and audio tracks are normalized locally; missing audio is filled with silence.

Output
MP4: H.264 video; AAC audio
Key settings
30 fps; 48 kHz stereo; default maximum height 720 px
Input size limit
250.0 MB per file; 500.0 MB combined
Processing
Local browser processing; no video upload; no account

Details checked . File size limits are not a guarantee of sufficient device memory.

A practical guide

Join two or more videos in the right order

Combine a pair of clips or a longer sequence into one continuous video. The merger shows each file in its playback order. Different compatible dimensions and frame rates are normalized locally rather than simply placing incompatible streams into the same file.

How to merge two videos online

  1. Choose two videos together, or choose the first and use Add clips for the second. Each input must meet the individual file limit, and the entire selection must meet the combined limit.
  2. Use the earlier and later arrows to set the order, and remove any unwanted clip. Review the estimated joined duration; it remains an estimate until the engine inspects the sources.
  3. Select Merge these videos. The processor normalizes each clip and joins them in the displayed order. Preview the downloaded MP4 around the join to check the picture and sound.

Output format and quality

Output is H.264/AAC MP4 at 30 frames per second, with the first clip determining the canvas aspect ratio and a default maximum height of 720 pixels. Letterboxing preserves differently shaped clips. Audio is standardized to 48 kHz stereo, with silence supplied for a clip that has no audio track.

File size and browser limits

Each input is limited to 250.0 MB. All selected clips together must be 500.0 MB or smaller. Size is checked before processing starts. These limits do not guarantee that every smaller file will fit your device’s available memory.

Long or high-resolution footage can need significant time and memory. Use shorter clips or smaller inputs if the browser cannot finish. The source stays on your device; processing loads the local engine only when needed. Read the format and processing FAQ and privacy policy for the limits and temporary data handling.