ModsFinder

NoInternet

by 2eGJHf8

NoInternet is a client-side Fabric optimization that blocks non-whitelisted network requests during game startup, so the launch does not wait on update checks and similar calls.

FabricClient-side onlyCC0 1.0 UniversalOpen source1.21.4 – 1.21.9

What it does

During the startup phase, NoInternet intercepts outgoing network requests and blocks any that do not match the whitelist. Requests that are allowed go through unchanged. The interception stops once the game reaches the TitleScreen, so normal online features work after the main menu appears. The stated aim is shorter startup time by removing calls that other factors would otherwise hold up.

The whitelist is a configuration file. Entries can match by prefix, and matching checks the full URL, meaning domain, path and parameters together. A missing or invalid whitelist is treated as a safe default so that requests are not allowed by mistake. Blocked connections are routed through invalid proxy ports that are generated at the first startup, and an optional log can record each interception. Descriptions in the config are translated with DeepL.

The mod requires Fabric API and is released under CC0 1.0 Universal, so the code is open source and public domain. Its source code is published, and it is available for 1.21.4 – 1.21.9 with the latest file 1.0.3 for 1.21.9, released 2025-10-01. Because it is client-side only, servers do not need it.

Key features

  1. Startup request blocking

    Non-whitelisted network requests are blocked while the game starts, which keeps unneeded update checks from delaying launch.

  2. Whitelist configuration

    A configuration file lists allowed requests, with several matching methods including prefix matching.

  3. Full URL matching

    Matching covers the domain, path and parameters, so a rule can allow one exact address and nothing else.

  4. Optional interception log

    Blocked requests can be written to a log for later reading, and the option can be turned off.

  5. Automatic stop at the title screen

    Interception ends when the game reaches the TitleScreen, leaving online features available afterward.

Compatibility

Latest build for each game version and loader.

1.21.91.0.3
1.21.81.0.3
1.21.71.0.3
1.21.61.0.3
1.21.51.0.3
1.21.41.0.3
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

Questions

Does NoInternet need Fabric API?

Yes. Fabric API is a required dependency and must be installed alongside NoInternet on Fabric.

Does a server need NoInternet?

No. The mod is client-side only, so servers run without it and players install it on their own game.

What happens if the whitelist file is missing or invalid?

The configuration treats a missing or invalid whitelist as a safe state, so requests are not allowed by mistake.

In the catalog

NoInternet is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 13,427 mods support Minecraft 1.21.9.

Optimization mods3,545Fabric modsMods for 1.21.913,427

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What the author says

This description was translated using DeepL. You can intercept non-whitelisted network requests during the game startup phase to avoid unnecessary update checks and other factors that slow down startup speed.
2eGJHf8, on the Modrinth page

Official listing

Owner
2eGJHf8
Published
2025-07-22
Updated on Modrinth
2025-10-01
Facts verified
2026-10-15

Tags

OptimizationUtility
Open on ModrinthCompare