Merge Video — free online tool
Merge Video runs entirely through temporary, in-memory processing: your file is uploaded, processed with FFmpeg, streamed back to you, and deleted immediately — nothing is stored permanently.
Drop a MP4, MOV, WEBM, MKV file here, or click to choose one
Processed temporarily, deleted afterDrop a MP4, MOV, WEBM, MKV file here, or click to choose one
MP4, MOV, WEBM, MKV
How it works
How merging works
Merge Video joins multiple clips into one file, end to end, in the order you upload them. When every clip shares the same codec and resolution, the join is a fast, lossless stream copy; mismatched clips may need re-encoding to join cleanly.
Before you merge
For the fastest, highest-quality result, use clips recorded with the same device/app so their format matches. Mixed formats still work but may take longer to process.
Limitations
Uploads are capped in size for reliable processing, and only MP4, MOV, WEBM, MKV files are accepted here. For very large files or advanced editing needs, dedicated desktop software may work better.
Frequently asked questions
Do my clips need to match?
Clips with the same codec/resolution join fastest and cleanest. Mismatched clips still merge but may need re-encoding, which takes longer.
What order will they play in?
The same order you upload them in.