plugin
JSEngineMinecraft plugin for 1.21
Wrapper for Nashorn JavaScript engine
- Latest version
- 3.3.5
- Minecraft
- 1.7 to 1.21
- Java
- Java 21+
- Loader
- Spigot
- Licence
- not stated
- Downloads
- 7.0k
- Updated
- 10 mo ago
- Available on
- SpigotMC
Host JSEngine servers
One click and JSEngine is installed with the right loader, on hardware built for it.
- 1.21
- Spigot
- One click plugin install
- Paper and Purpur ready
- Automatic updates
- NVMe SSD
Minecraft versions
Every version JSEngine declares support for, newest first, with the Java runtime that version needs.
| Minecraft | Through | Java | Evidence | Released |
|---|---|---|---|---|
| 1.21 | Spigot | 21+ | declared | 13 Jun 2024 |
| 1.20.6 | Spigot | 21+ | declared | 29 Apr 2024 |
| 1.20 | Spigot | 17+ | declared | 2 Jun 2023 |
| 1.19 | Spigot | 17+ | declared | 7 Jun 2022 |
| 1.18 | Spigot | 17+ | declared | 30 Nov 2021 |
| 1.17 | Spigot | 16+ | declared | 8 Jun 2021 |
| 1.16 | Spigot | 8+ | declared | 23 Jun 2020 |
| 1.15 | Spigot | 8+ | declared | 9 Dec 2019 |
| 1.14 | Spigot | 8+ | declared | 23 Apr 2019 |
| 1.13 | Spigot | 8+ | declared | 18 Jul 2018 |
| 1.12 | Spigot | 8+ | declared | 2 Jun 2017 |
| 1.11 | Spigot | 8+ | declared | 14 Nov 2016 |
| 1.10 | Spigot | 8+ | declared | 8 Jun 2016 |
| 1.9 | Spigot | 8+ | declared | 29 Feb 2016 |
| 1.8 | Spigot | 8+ | declared | 2 Sept 2014 |
| 1.7 | Spigot | 8+ | declared | 22 Oct 2013 |
Download
From JSEngine’s own host. Nothing is re-hosted here.
jsengine-3.3.5.jar · 2.3 MB
Older versions16Hide older versions
- 3.3.44 Oct 20241.6k downloadsGet
- 3.3.017 Oct 20231.7k downloadsGet
- 3.2.214 May 2023877 downloadsGet
- 3.2.127 Feb 2023497 downloadsGet
- 3.2.027 Feb 20233 downloadsGet
- 3.1.123 Dec 20211.9k downloadsGet
- 3.1.03 Dec 2021158 downloadsGet
- 3.0.415 Jun 2021271 downloadsGet
- 3.0.329 May 202141 downloadsGet
- 3.0.229 May 202126 downloadsGet
- 3.0.127 May 20211 downloadsGet
- 3.0.027 May 20211 downloadsGet
- 2.0.226 May 20213 downloadsGet
- 2.0.126 May 20214 downloadsGet
- 2.0.026 May 20211 downloadsGet
- 1.0.026 May 20212 downloadsGet
Frequently asked
Does JSEngine work on Minecraft 1.21?
Yes. 1.21 is the newest Minecraft version JSEngine 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 JSEngine support?
Everything the author has declared, from 1.7 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 JSEngine on the client or the server?
The server only. Players join with an ordinary Minecraft client and install nothing.
Which server software does JSEngine need?
Spigot. A build for one server platform will not load on another, so this is the first thing to check before the Minecraft version.
Which Java version do I need for JSEngine?
Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the plugin itself.
How do I install JSEngine?
Download the file from the author's own release, drop it into your server's plugins folder, and restart the server. It generates its configuration on first start. Check the Minecraft version matches the one your server runs.
Where do I download JSEngine safely?
From the author's own page on SpigotMC, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.
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? .

