Drop a file here or click to choose
Your file stays on your device. Processing happens locally in your browser.
What is Merge Videos?
Merge Videos joins two or more clips into one file in the order you set. Each clip appears as a card with its length, size and format; drag the cards (or use the arrow buttons) to reorder, preview or remove them. Clips that share the same format are joined without re-encoding; different sizes and frame rates are fitted onto one frame automatically. It runs in your browser — no clip is uploaded.
Merge videos online by ordering clip cards and joining them into one MP4. Matching clips are joined without re-encoding; different sizes are fitted onto one frame. Runs locally in your browser.
Key features
- Clip cards with length, resolution and format
- Drag to reorder (mouse and touch) or use arrow buttons
- Lossless join when clips match; automatic fitting when they don't
- Output size Auto / 1080p / 720p / 480p and shape Auto / 16:9 / 9:16 / 1:1
- Clips without sound get silence so the audio stays in sync
- Runs in your browser — your videos never leave your device
Popular uses
- Combine several phone clips from one event
- Join an intro, the main video and an outro
- Put screen-recording parts together into one tutorial
Supported formats
Input: MP4, M4V, MOV, WebM, MKV, AVI (mixed formats allowed). Output: MP4, WebM, MOV or MKV.
Troubleshooting
- One clip has black bars Its shape differs from the first clip. Choose an output ratio, or resize or crop that clip first.
- The page says the job is too heavy Remove a clip, use shorter clips, or switch to a computer with more memory.
Also known as: Video Joiner, Combine Videos, Video Merger.
How it works
- Choose two or more videos — they stay on your device.
- Drag the cards (or use the arrows) to set the order; preview or remove clips.
- Pick the output size and shape, click Run and download one joined video.
FAQ
How many videos can I merge?
Up to 10 clips on devices with plenty of memory, fewer on phones — the page shows your limit. The joined video has to fit in your browser's memory.
Is my video uploaded?
No. Merge Videos runs entirely in your browser with WebAssembly. Your files never leave your device and are never sent to Fah Swe servers.
Why is the number of clips limited?
The joined video is built in your browser's memory. Phones get a lower limit than computers; the page shows the limit for your device.
Will merging reduce quality?
Matching clips are joined without re-encoding (no loss). Otherwise they are encoded once at high quality.