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

#1602 custom thumbnail extractors; docs/example (thx @kamaeff!) 1864805 dbc6df8
#1604 u2c: password can be provided in env-var U2C_PW (thx @shermanhlc!) 4729747
wopi: option --wopi-accs to limit who's able to use the feature 78a4ee4
- also fixes wopi on servers where user does not have read/write-access to root volume
- also restricts the token to just that one file; good if the wopi-client is some cloud thing that shouldn't be trusted
#1591 wopi: use persistent file-ID which is necessary for real-time collab (thx @kamaeff!) efcf96e
#1605 the lightbox can show svg images now 825f1c9

up2k: client could waste a little bandwidth while recovering from a network glitch 18791c5
if PRTY_CONFIG is set to a config-file that is also autodetected, then explain the misconfiguration instead of crashing like before 14e2d79
wopi: fix session-timeout hint to clients (thx @kamaeff!) 92c3f32
js: fix chance of duplicate prologue on very first page visit eeb399e
js: fix panic on image dragdrop out of the browser window dcc0abd

up2k: client now detects when server or reverseproxy is incorrectly configured with an impractically small request-body-size-limit, crashing the website with an explanation how to fix it f19ef03
- also allows setting the chunksize all the way down to 1 megabyte when absolutely necessary (bad idea, slow)
new option --allow-svg-js if you really want that 566de65
shares: harden single-file shares some more 21c2c72 9ff6a71
- just removing footguns (motivated by a bug-report that was a false-positive)
copyparty.exe: upgrade to python 3.14.7 from 3.13.14 8b6e897
- larger and slightly faster (compensated for the size bloat by making the text-image-generator more shitty)

the thumbex example is also a cool example how relevant the "pseudo" in PRNG can be; with random.randrange instead of os.urandom, first run followed by restarting copyparty and another run...heh

download link	is it good?	description
copyparty-sfx.py	✅ the best 👍	runs anywhere! only needs python
copyparty-en.py	✅ also good	same but english-only, no i18n
a docker image	it's ok	good if you prefer docker 🐋
copyparty.exe	⚠️ acceptable	for win8 or later; built-in thumbnailer
u2c.exe	⚠️ acceptable	CLI uploader as a win7+ exe (video)
copyparty.pyz	⚠️ acceptable	similar to the regular sfx, mostly worse
copyparty-en.pyz	⚠️ acceptable	english-only, no smb-server
copyparty32.exe	⛔️ dangerous	for win7 -- never expose to the internet!
cpp-winpe64.exe	⛔️ dangerous	runs on 64bit WinPE, otherwise useless
bootable usb	┐(ﾟ∀ﾟ)┌	a surprisingly useful joke (x86_64)