Restore a file downloaded in parts
Merge .part1, .part2 and the rest back into the original file, then check that it opens.
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Guide
Join Split Files passes the chosen files to the Blob constructor in list order, producing one continuous stream of raw bytes. Files are added in natural name order (part2 before part10), and any entry can be moved up or down by hand.
Updated 2026-09-271 min read
video.mp4.part1 + video.mp4.part2 are concatenated byte by byte; the tool tries to infer video.mp4 from the first part's name, but it does not verify that the result really is an MP4.
Merge .part1, .part2 and the rest back into the original file, then check that it opens.
Any byte stream that was cut in order can be put back together, not only parts produced by this site's tools.
Look at the natural sort result first (part2 before part10) and reorder by hand before joining if needed.
No. Ordinary video clips need a media container or transcoding tool; this only fits byte-level parts of one original file.
Part bytes are referenced and concatenated locally in the browser and are never uploaded.
Updated 2026-09-27
Concatenate .part volumes in order to rebuild the original file; natural sort with manual reordering
Sorts naturally by name (part1 → partN); you can reorder them manually