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KotlinMCMinecraft plugin for 1.21.10

A SpigotMC, BungeeCord and Velocity Plugin with the Kotlin Runtime and Other Libraries that automatically updates upon a new Kotlin Version

server onlynewest supported 1.21.10UtilityLibrary
Latest version
2.2.20
Minecraft
1.8 to 1.21.10
Java
Java 21+
Platforms
Bukkit, Velocity, Sponge, Spigot and 5 more
Licence
GPL-3.0-only
Downloads
7.7k
Updated
12 mo ago
Available on
Modrinth
Space NodeOur hosting

Host KotlinMC servers

One click and KotlinMC is installed on a Paper or Purpur server built for it.

  • 1.21.10
  • Bukkit
  • Velocity
  • Sponge
  • Spigot
  • One click plugin install
  • Paper and Purpur ready
  • Automatic updates
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version KotlinMC declares support for, newest first, with the Java runtime that version needs.

Other plugins
MinecraftThroughJavaEvidenceReleased
1.21.10Bukkit, Velocity, Sponge, Spigot, Waterfall, Purpur, Paper, Folia, BungeeCord21+declared7 Oct 2025
1.21.9BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit21+declared30 Sept 2025
1.21.8BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit21+declared17 Jul 2025
1.21.7Spigot, Waterfall, Velocity, Sponge, Purpur, Paper, Folia, BungeeCord, Bukkit21+declared30 Jun 2025
1.21.6Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord21+declared17 Jun 2025
1.21.5BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit21+declared25 Mar 2025
1.21.4Folia, Waterfall, Velocity, Sponge, Bukkit, Spigot, Purpur, Paper, BungeeCord21+declared3 Dec 2024
1.21.3Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord21+declared23 Oct 2024
1.21.2Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord21+declared22 Oct 2024
1.21.1BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit21+declared8 Aug 2024
1.21BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit21+declared13 Jun 2024
1.20.6Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord21+declared29 Apr 2024
1.20.5Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord21+declared23 Apr 2024
1.20.4BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit17+declared7 Dec 2023
1.20.3BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit17+declared4 Dec 2023
1.20.2BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit17+declared20 Sept 2023
1.20.1Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord17+declared12 Jun 2023
1.20Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord17+declared2 Jun 2023
1.19.4BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit17+declared14 Mar 2023
1.19.3BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit17+declared7 Dec 2022
1.19.2Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord17+declared5 Aug 2022
1.19.1Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord17+declared27 Jul 2022
1.19BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit17+declared7 Jun 2022
1.18.2BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit17+declared28 Feb 2022
1.18.1BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit17+declared10 Dec 2021
1.18Spigot, Waterfall, Velocity, Sponge, Purpur, Paper, Folia, BungeeCord, Bukkit17+declared30 Nov 2021
1.17.1Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord16+declared6 Jul 2021
1.17BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit16+declared8 Jun 2021
1.16.5BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit8+declared14 Jan 2021
1.16.4Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord8+declared29 Oct 2020
1.16.3Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord8+declared10 Sept 2020
1.16.2BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit8+declared11 Aug 2020
1.16.1BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit8+declared24 Jun 2020
1.16Folia, Waterfall, Velocity, Sponge, Bukkit, Spigot, Purpur, Paper, BungeeCord8+declared23 Jun 2020
1.15.2Purpur, Bukkit, BungeeCord, Folia, Paper, Spigot, Sponge, Velocity, Waterfall8+declared17 Jan 2020
1.15.1Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord8+declared16 Dec 2019
1.15BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit8+declared9 Dec 2019
1.14.4BungeeCord, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, Bukkit8+declared19 Jul 2019
1.14.3Spigot, Waterfall, Velocity, Sponge, Purpur, Paper, Folia, BungeeCord, Bukkit8+declared24 Jun 2019
1.14.2Bukkit, Waterfall, Velocity, Sponge, Spigot, Purpur, Paper, Folia, BungeeCord8+declared27 May 2019

29 older versions not shown.

Download

From KotlinMC’s own host. Nothing is re-hosted here.

2.2.20release10 Sept 2025

KotlinMC-2.2.20.jar · 7.8 MB · for 1.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +64 more

Download latest
ab22df5f0d0d…
Older versions16
  • 2.2.1014 Aug 20251.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +61 more7.7 MB94 downloadsca9d4113ff36…Get
  • 2.2.07 Jul 20251.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +61 more7.7 MB50 downloads35f32eb3912f…Get
  • 2.1.2111 Jun 20251.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +59 more7.5 MB86 downloads4d85007f6a0c…Get
  • 2.1.208 Apr 20251.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +59 more7.5 MB76 downloadsbc5713771340…Get
  • 2.1.1026 Feb 20251.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +58 more7.4 MB85 downloads5d0a41a2e6dd…Get
  • 2.1.06 Jan 20251.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +58 more7.4 MB71 downloads5f5ebbfe41d2…Get
  • 2.0.2119 Nov 20241.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +57 more7.4 MB73 downloads6e131d4a9369…Get
  • 2.0.2019 Sept 20241.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +55 more7.4 MB81 downloads137ef1709f9b…Get
  • 2.0.1019 Aug 20241.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +54 more6.8 MB59 downloads56e388d68a90…Get
  • 1.9.2519 Jul 20241.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +54 more6.9 MB72 downloads51d194d5c7f1…Get
  • 2.0.015 Jul 20241.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +54 more6.8 MB82 downloads7284ce4a610f…Get
  • 1.9.2417 May 20241.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +53 more7.0 MB63 downloadsa59729debe4d…Get
  • 1.9.2322 Apr 20241.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +51 more7.0 MB64 downloads6f53fbb35704…Get
  • 1.9.2216 Feb 20241.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +51 more7.0 MB97 downloads32e29cf4190b…Get
  • 1.9.2130 Nov 20231.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +49 more7.0 MB50 downloads6bc942882aec…Get
  • 1.9.2015 Nov 20231.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4 +49 more7.0 MB49 downloads66854faf1f29…Get

Frequently asked

Does KotlinMC work on Minecraft 1.21.10?

Yes. 1.21.10 is the newest Minecraft version KotlinMC 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 KotlinMC support?

Everything the author has declared, from 1.8 up to 1.21.10. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install KotlinMC on the client or the server?

The server only. Players join with an ordinary Minecraft client and install nothing.

Which platform or loader does KotlinMC support?

Bukkit, Velocity, Sponge, Spigot, Waterfall, Purpur, Paper, Folia, BungeeCord. 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 KotlinMC?

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.

What licence is KotlinMC under?

GPL-3.0-only, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install KotlinMC?

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 KotlinMC safely?

Start with the author's page on Modrinth, 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.

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Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .