Merge Videos
Join multiple videos in order, right in your browser. Your files never leave your device.
$Drop multiple video files here, or click to select
Batch selection supported; at least 2 video files required.
Load files into browser memory in order; nothing is uploaded.
Drag to reorder clips and pick the output container format.
FFmpeg WASM concatenates and exports everything locally.
Merge Videos Online Free
Local · No uploadsCombine multiple videos into one file online without uploading them. Drag to set the order, upload in batches, and let the tool handle clips that use different resolutions or encodings. It’s handy for joining screen recordings, phone clips, GoPro footage, and highlights into one export — with no watermark and no account.
Quick Answers
- Clips are joined in upload order into a single file; drag to reorder, and batch upload is supported for multi-clip merges in one pass.
- When clips share the exact same codec, resolution, and frame rate, they're joined losslessly via concat stream copy (-c copy); mismatched clips are automatically re-encoded to one uniform spec.
- A "Non-monotonous DTS" error or a silent second half usually means differing frame rates, audio sample rates, or channel counts — normalize the clips to one spec first.
- There's no fixed merge limit — it depends on your browser's available memory. Everything is processed locally; files are never uploaded.
How to Merge Videos
- 1
Upload multiple video files
- 2
Arrange the merge order — drag to reorder
- 3
Choose the output format
- 4
Click Merge, then download the combined video
Common Uses
- Join screen recordings, phone clips, or GoPro footage into one video
- Combine highlights into a continuous compilation for social media
- Organize footage shot at different times into a single timeline
Things to Keep in Mind
- Videos with different resolutions or encodings are re-encoded to a uniform output
- Clips with very different frame rates or audio tracks may drift slightly out of sync
- Merging several large files takes time and browser memory
How to Choose a Video Merger
- vs. professional editors: focused on merging only — zero learning curve
- vs. upload-based tools: nothing is uploaded and the export has no watermark
- Supports batch upload and reordering for multi-clip joins in one pass
Two Ways to Join Videos
- The lossless path is concat stream copy: when clips share the exact same codec, resolution, and frame rate, they're joined end to end without re-compressing — fast and zero quality loss.
- Clips with mismatched parameters must be re-encoded to a common spec — every segment is compressed to the same settings before being joined. That's also the more robust route for mixed footage.
- Audio-video desync usually traces back to differing timebases or frame rates between clips; transcoding everything to one spec eliminates most of it.
Video Merging FAQ
Can I merge videos without uploading them?
Yes. The files are read by your browser and processed with FFmpeg WASM, so they never leave your device.
Will the merged video have a watermark?
No. The tool doesn’t add a watermark or require an account to download the result.
What happens with videos of different resolutions?
They're transcoded and merged into one uniform output. For best results, merge clips that share the same resolution.
How many videos can I merge?
There's no fixed limit — it depends on the total file size your browser's memory can hold.
Does merging reduce quality?
Merging re-encodes the video. Default settings stay close to the original; when source clips differ significantly, they're normalized to a uniform spec.
Can I change the order of the videos?
Yes. After uploading, drag to reorder the list — that determines the final sequence.
Can I combine multiple clips into a single file?
Yes. Upload them, arrange the order, and merge everything into one complete video in a click.