• read-only demo server at https://a.ocv.me/pub/demo/
• docker image ╱ similar software ╱ client testbed

there is a discord server with an @everyone in case of future important updates, such as vulnerabilities (most recently 2026-07-27)

recent important news

• v1.20.19 (2026-07-27) fixed an FTP-server vuln (upload outside defined volumes)
• v1.20.17 (2026-07-06) fixed a vuln when a volume has both filekeys and dirkeys enabled
• v1.20.17 (2026-07-06) introduced csp nonces, possibly breaking some javascript-based plugins

🧪 new features

• new option --redup (global or volflag) to convert local files between various dedup approaches fd4f434 2291590 16a3f5d
  • turn full copies into reflinks/symlinks/hardlinks or convert between those
  • run it with --redup-dry (dryrun) to check for unexpected consequences
  • WARNING: maybe take a snapshot of your filesystem before enabling this; brand new code with little testing, read --help-redup and use with care
    • the feature is currently being stress-tested; results on tuesday
• #1643 textfile-viewer can detect filetype from shebang (thx @botahamec!) 097b830
• when dedup with reflink is enabled, then also dedup between volumes when possible (since reflink makes that safe) 735d6e0 5ddbce3
• option -i no to launch copyparty without the webserver, for indexing / testing / whatever c92435c

🩹 bugfixes

• if --dedup was enabled, then copying a file from one volume to another could dedup (create a symlink/hardlink/reflink) instead of a full copy 947d73e
  • mainly an issue for portable storage such as flashdrives, and the main reason why --redup was added
• the list of filenames given as input to xiu hooks did not have a trailing newline c688bb2
• #1611 volflag nosub would still result in empty folders from up2k ec4a95e
• fix PRTY_NO_IFADDR 6867ccc

🔧 other changes

• iOS: further improved upload-speeds on buggy iOS versions 971a62c
  • looks like apple is working on fixing this bug; iOS v27 made https way more stable but http is still just as broken, so improved the workaround a bit more
• added --help-dedup and --help-redup 2291590 16a3f5d
• add a warning that the sourceforge project is not official and probably malware bfc3cff

🌠 fun facts

• the railgun roulette vip-mix has the same bpm as the turn-signal on a honda jazz
  • on that note, this fantasy-OPNA remake is too awesome to leave out

💾 what to download?

• except for u2c.exe, all of the options above are mostly equivalent
• the zip and tar.gz files below are just source code
• python packages are available at PyPI