plugin
IOSyncMinecraft plugin for 1.21
Synchronize the player data across multiple servers in a network
- Latest version
- 1.8.1
- Minecraft
- 1.16 to 1.21
- Java
- Java 21+
- Platform
- Spigot
- Licence
- not stated
- Downloads
- 1.5k
- Updated
- 2 d ago
- Available on
- SpigotMC
Host IOSync servers
One click and IOSync is installed on a Paper or Purpur server built for it.
- 1.21
- Spigot
- One click plugin install
- Paper and Purpur ready
- Automatic updates
- NVMe SSD
Minecraft versions
Every version IOSync declares support for, newest first, with the Java runtime that version needs.
Download
From IOSync’s own host. Nothing is re-hosted here.
iosync-spigot-1.8.1.jar · 0.2 MB
Older versions24Hide older versions
- 1.817 Nov 20258 downloadsGet
- 1.714 Oct 20255 downloadsGet
- 1.614 Sept 20254 downloadsGet
- 1.5.136 Aug 202581 downloadsGet
- 1.5.1217 Dec 202470 downloadsGet
- 1.5.1113 Nov 202433 downloadsGet
- 1.5.1017 Aug 202439 downloadsGet
- 1.5.93 Aug 202422 downloadsGet
- 1.5.81 May 202437 downloadsGet
- 1.5.724 Mar 202455 downloadsGet
- 1.5.622 Dec 202371 downloadsGet
- 1.5.527 Sept 202346 downloadsGet
- 1.5.425 Jun 202381 downloadsGet
- 1.5.323 May 202340 downloadsGet
- 1.5.23 Jan 202361 downloadsGet
- 1.5.18 Sept 202254 downloadsGet
- 1.57 Sept 202241 downloadsGet
- 1.4.21 Jul 202243 downloadsGet
- 1.4.115 Jun 202245 downloadsGet
- 1.4.015 Jun 202241 downloadsGet
- 1.3.318 Jan 2022118 downloadsGet
- 1.3.230 Nov 2021114 downloadsGet
- 1.3.125 Jul 2021120 downloadsGet
- 1.317 Jul 2021125 downloadsGet
Frequently asked
Does IOSync work on Minecraft 1.21?
Yes. 1.21 is the newest Minecraft version IOSync declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.
Which Minecraft versions does IOSync support?
Everything the author has declared, from 1.16 up to 1.21. The full list is in the table above, with the Java runtime each version needs next to it.
Do I need to install IOSync on the client or the server?
The server only. Players join with an ordinary Minecraft client and install nothing.
Which platform or loader does IOSync support?
Spigot. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.
Which Java version do I need for IOSync?
On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the plugin itself, so on an older supported Minecraft the answer is that version's Java, not this one.
How do I install IOSync?
Choose the release variant for your server platform. Paper, Spigot, Purpur and Bukkit files go in the server's plugins folder; Fabric, Forge, NeoForge and Quilt files go in the mods folder. Restart after installing and check that the Minecraft version matches your server.
Where do I download IOSync safely?
Start with the author's page on SpigotMC, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.
Works on the same versions
Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.
Is this information wrong or missing something? .

