Yes. Shrink is free to download from Modrinth. Its license is LGPL-3.0.

How do I add it to my Nxeon server?

Use “Add to a server” on this page, or open NxLabs from your dashboard. We install it, restart your server and switch it on.

Shrink — Minecraft Mods | NxLabs

From Modrinth

Shrink is a small mod for Minecraft that allows players to change their player's size.

 Shrink is a small mod that lets you change your player's size.

By shrinking, you gain access to places that would normally be off-limits without breaking blocks. 
The mod introduces a single item called the Personal Shrinking Device.
When you shift-right-click this device, your player magically shrinks down to about the size of a quarter of a block.
The Personal Shrinking Device requires power from any RF/Forge Energy source, although you can disable this feature in the configuration file.

Use Cases

 Imagine infiltrating secret passages, exploring tiny nooks, or even hiding from mobs as a minuscule adventurer. 
Need to slip through a narrow gap? Shrink! - Want to experience the world from a bug's perspective? Shrink!
Tired of towering over everything? Shrink!
While small, you'll still pack a punch. Your tiny self can wield mighty weapons and armor.
Be cautious some mobs might not appreciate your newfound compactness.

From source data

Supports 19 Minecraft versions, the newest being 26.3.

Runs on Fabric, Forge and NeoForge.

Rated a light load on a server.

From our catalogue

One-click install: Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
Server side: Required on the server
Server type needed: Fabric, Forge, NeoForge
Server load: light
Smallest plan we suggest: Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
Latest build: 26.3-2.1.3, released 2026-10-23

Loader	Game versions	Newest
NeoForge	1.21.7 to 26.3 (4 versions)	26.3
Fabric	26.1.2 to 26.3 (2 versions)	26.3

From 7 recorded builds of Shrink.

Build	Released	Game versions	Loaders
26.3-2.1.3	2026-10-23	26.3	NeoForge
26.3-2.1.3	2026-10-23	26.3	Fabric
26.3-2.1.2	2026-09-16	26.3	Fabric
26.3-2.1.2	2026-09-16	26.3	NeoForge
2.1.1	2026-05-12	26.1.2	Fabric
2.1.1	2026-05-12	26.1.2	NeoForge

Declared by the newest build that lists any. Required ones are installed with it on one-click installs.

Pick a server or deploy a new one above; it is installed in one click.

From the catalog

Listed on Modrinth as “Mods”

New mechanics, content and overhauls that change how the game plays.

From source side support

Modrinth lists Shrink as required on the server. Check its Modrinth page to see whether players need it too.