File Joiner
Select a set of split file parts and rejoin them, sorted by filename, into a single downloadable file.
About this tool
Select every part file at once — for example the .part001, .part002, .part003 files produced by the companion File Splitter tool — and this tool sorts the selected files by filename, reading any numbers in the names as numbers, then concatenates their raw bytes in that order into a single file for download. So zero-padded names (part001, part002 … part010) and unpadded ones (part1, part2 … part10) both come out in the right order. The order the parts will be joined in is shown before you commit, along with each part's size and a running total, so you can double-check it looks right. Because a generic .partNNN filename doesn't carry the original file's name or extension, you'll need to type the output filename yourself (including its extension, if you know it) — this tool makes a best-effort guess by stripping a trailing part suffix from the first file's name, which you're free to overwrite. Nothing is uploaded anywhere; the parts are read and joined entirely on your device.