Video Merger
Video Merger lets you combine multiple video clips into one seamless MP4, directly in your browser. Trim each clip, drag to reorder them, then merge in a single click. No file is uploaded to any server — your videos never leave your device.
Drag & drop your files here
or browse files from your deviceSelect multiple files at once
Max size limit: 500 MB per file
Specifications
Guide
Upload your video clips
Drop two or more video files (MP4, MOV, AVI, MKV, WebM) onto the upload area. You can add more clips at any time using the "Add more videos" button.
Trim and arrange each clip
Each clip shows a thumbnail timeline — drag the handles to trim. Click Preview to watch the selected segment, then drag the grip icon to reorder clips in the final sequence.
Merge and download
Click Merge. FFmpeg re-encodes each trimmed segment to H.264 + AAC and joins them into one MP4. Download the finished file.
Key features
Per-clip trim editor
Each clip has its own draggable timeline with thumbnail strips, so you can precisely choose which portion of each file to include.
Drag-to-reorder sequence
Grab the grip handle on any clip and drag it to a new position. The numbered badges update instantly to reflect the final order.
Inline video preview
Click Preview on any clip to watch the selected segment in a mini player right inside the editor — no need to open a separate window.
Add clips at any time
You can add more videos after the initial selection using the "+ Add more videos" button above the merge action.
No uploads, no watermarks
Everything runs in your browser via FFmpeg.wasm. Files never leave your device.
Frequently asked questions
Yes, everything runs in your browser using FFmpeg.wasm. No file is uploaded to any server, no server ever processes your videos, and your files never leave your device.
You can combine MP4, MOV, AVI, MKV, and WebM files in any combination. The output is always MP4 (H.264 + AAC) for maximum compatibility.
Up to 500 MB per clip. There is no limit on the number of clips, but merging many large files is CPU-intensive and requires sufficient browser memory.
Yes, it works on any modern browser — desktop or mobile. Merging large clips on mobile will take longer due to limited CPU, but it works.
Yes, completely free. No signup, no account, no watermark, and no daily quota. Just open the page and start using it.
Learn more
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Pull the audio track from any video file. Export as MP3 or WAV.