ModsFinder

OfflineLAN

by Aeroshide

Players hosting a world can switch off online-mode from the Open To LAN screen with OfflineLAN, a Fabric mod that moves a server.properties setting into the client.

FabricClient and serverGNU General Public License v3.0 or laterOpen source1.14 – 26.3

What it does

Online-mode is a server setting that decides whether players must authenticate with Mojang's servers before joining. When it is on, each player's account is verified; when it is off, that check is skipped. OfflineLAN makes the setting available inside the Open To LAN and Multiplayer menu of a single-player world, where it was not previously reachable.

The toggle defaults to on, matching server.properties, so the change only takes effect when a player deliberately turns it off. It applies only when the world is opened to LAN, so installing the mod does not weaken a world on its own. Connections then behave as they would on a dedicated server, whether the world is port-forwarded or shared through e4mc or e4mcbiat. Disabling online-mode lets an offline-mode launcher instance, such as one run from MultiMC, join the world.

The mod is open source under the GNU General Public License v3.0 or later. Fabric API is required, and the 2.0.0 release lists it as a hard dependency. Vanilla clients can join without the mod, so it is only needed on the machine hosting the world.

Key features

  1. Open To LAN toggle

    An online-mode option appears in the Open To LAN and Multiplayer screens, so the setting can be changed without editing files.

  2. Off by default

    The option starts in the on position, so authentication stays required unless the host switches it off.

  3. Scoped to LAN sessions

    The setting applies only when a world is opened to LAN, not during every session.

  4. Port-forwarding and relay support

    Connections work the way they do on a dedicated server, including port-forwarded worlds and e4mc or e4mcbiat relays.

Compatibility

Latest build for each game version and loader.

26.x5 of 5 versions with builds
26.32.0.0
26.22.0.0
26.1.22.0.0
26.1.12.0.0
26.12.0.0
1.21.x12 of 12 versions with builds
1.21.112.0.0
1.21.102.0.0
1.21.92.0.0
1.21.82.0.0
1.21.72.0.0
1.21.62.0.0
1.21.52.0.0
1.21.42.0.0
1.21.32.0.0
1.21.22.0.0
1.21.12.0.0
1.212.0.0
1.20.x7 of 7 versions with builds
1.19.x5 of 5 versions with builds
1.18.x3 of 3 versions with builds
1.17.x2 of 2 versions with builds
1.16.x6 of 6 versions with builds
1.15.x3 of 3 versions with builds
1.14.x5 of 5 versions with builds
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

Use cases

Offline-mode launcher accounts

A second Minecraft instance started in offline mode in MultiMC can join a world the host has opened to LAN with online-mode disabled.

Friends on a relay

Hosts sharing a world through e4mc or e4mcbiat can allow players without Mojang accounts to connect.

Who it’s for: Single-player players who open their worlds to LAN and want to control whether joining players must authenticate. Owners who run worlds that others join should read the caveats first, since disabling authentication exposes the world to malicious players.

How it compares

Full comparison

Open to LAN Fix is client-side only and not open source, with files for 26.2 under All rights reserved. Partial Online Mode is server-side only under the MIT License, also for 26.2 and not open source. LAN Operators is client-side only and open source under the MIT License, covering 1.16 – 1.21.4.

ModLoadersGame versionsEnvironmentUpdated
OfflineLANFabric1.14 – 26.3Client and server2026-09-17
Open to LAN FixFabric26.2Client-side only2026-06-11
Partial Online ModeFabric26.2Server-side only2026-07-24
LAN OperatorsFabric1.16 – 1.21.4Client-side only2024-12-29

Questions

Does OfflineLAN need Fabric API?

Yes. Fabric API is a required dependency, and the 2.0.0 release lists it as a hard requirement.

Do other players need the mod?

No. Servers that run it need every player to install it too.

Is it safe to turn online-mode off?

The author warns that the option is dangerous. Anyone can join an unauthenticated world, so a backup and a security layer should be in place first.

In the catalog

OfflineLAN is one of 5,392 Social mods on ModsFinder, and one of 4,084 Social mods for Fabric. 8,071 mods support Minecraft 26.3.

Social mods5,392Fabric modsMods for 26.38,071

More from Aeroshide

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Rose Bush1.14 – 26.3SpecSpoof1.14 – 26.3BoostedExperience1.14 – 26.3Riptide Outside Water1.21.4 – 26.3SyncedAdvancements1.15 – 26.3DebugGUIScale1.21 – 26.2

Similar mods

Simple Voice Chat1.8.8 – 26.3No Chat Reports1.19 – 26.3Chat Heads1.16 – 26.3Essential Mod1.8.9 – 26.3More Chat History1.16.5 – 26.3e4mc1.17 – 26.3

What the author says

This mod depends on the library mod Fabric API! OfflineLAN is a Fabric mod that gives you the power to manage your online-mode configuration directly that is usually accessed from server.properties to your client where it was previously inaccessible.
Aeroshide, on the Modrinth page

Official listing

Owner
Aeroshide
Published
2025-04-16
Updated on Modrinth
2026-09-17
Facts verified
2026-10-15

Tags

ManagementSocialUtility
Open on ModrinthCompare