Skip to content
BrowseScan your modsScan

    No project matches this search.

    2,046,932 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 24 Oct 2026.636,163 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 24 Oct 2026.269,480 projects gradedProjects with a letter from A to F. Counted on 24 Oct 2026.
    How it worksMalware we foundAPIAboutPrivacyTermsContact

    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    BandwidthOptimizer

    Mod

    Use less internet data while playing on busy multiplayer servers.

    C69/ 100
    • OverviewC
    • SecurityPassed
    • PrivacyGoes online
    • AIAI-aided code +1
    • CompatibilityUp to 26.2
    • ModpacksIn 47
    • ReleasesLatest 12 Oct

    Download

    BandwidthOptimizer-5.10.32.140-fabric-26.2.jar Beta

    Released 12 Oct 2026 · 9.0 MB

    Passed: our checks found nothing harmful in this file.

    Download

    Required to run

    • Fabric APIAMinecraft 26.2 · Fabric (release 0.161.0)
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade C

    How grades work

    Strengths

    • Public source code and issue tracker
    • Widely used

    Points lost

    • Many modpacks removed it−10 points
    • Releases replaced within 3 days to fix a problem−7 points
    • First release only 6 months ago−4 points
    • Releases in only 7 of the last 24 months−1 point
    All 11 criteria

    • Maintenance

      1 point lost26 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.12 days ago (12 Oct 2026) 12 / 12
      Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.26.2 on NeoForge and Fabric, 1.21.1 on Quilt, 1.20.1 on Forge. 15% or more of the popular mods updated in the last 6 months also have files for 26.2. Latest Minecraft: 26.3. 9 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 7 of the last 24 months 5 / 6

    • Stability

      17 points lost5 / 22
      Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.20 of the 44 modpacks with two or more versions removed it in a later one (45%) See the 20 modpacks0 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.15 of its 35 releases in 2 years needed a quick fix (43%) See the 15 releases0 / 7
      Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5

    • Transparency

      Full points10 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · duckgun13476/BandwidthOptimizer 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · duckgun13476/BandwidthOptimizer 3 / 3

    • Popularity

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.326,614 4 / 4

    • Track record

      4 points lost4 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.6 months, 151 releases 4 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 8 latest files for recent Minecraft versions. See Security
    Total69 / 100

    48.8 of the 71 points that apply = 69 out of 100. The points above are rounded to whole numbers.

    Images

    • Compared with vanillia
    • HIgh bandwidth save

    About

    BandwidthOptimizer is a client-and-server network optimization mod for heavily modded Minecraft servers, designed to reduce repeated traffic from logins, custom payloads, machine and storage networks, chunk travel, and idle clients rather than improve FPS or TPS. It works on encoded packet data, combining recoverable streaming compression and repeated-structure mapping with ordered batching for compatible small packets, then restores the original bytes before ordinary Minecraft packet decoding. For terrain, it uses verified full, reference, and patch transfers, plus a bounded persistent client cache that can reuse chunks after reconnects or revisits; missing, stale, or invalid cache data falls back to a full packet. Light and deep idle modes reduce presentation-only updates while a player is inactive and restore current block, entity, HUD, and supported mod state when they return. A client HUD and operator-uploaded BO Stats reports expose traffic totals, per-player history, packet sources, cache behavior, bypasses, and idle-mode savings, with on-demand diagnostics for investigating network issues. Compatibility testing includes Create, Aeronautics, Cobblemon, Voxy, and AutoFish, as well as the Velocity proxy; results vary with packet mix and server setup, and measured savings are not guaranteed.

    Written from Modrinth and the GitHub README . How we write it

    In-game changes

    Changes the game's code in 4 areas: Networking and multiplayerChanges 7 game code files in this area: connections, the server list and what is sent between your game and a server., Game coreChanges 1 game code file in this area: the main loop, lighting and other code the whole game uses., User interfaceChanges 1 game code file in this area: menus, screens, tooltips, the chat window and the in-game overlay. and Chunk loading and storageChanges 1 game code file in this area: how the game loads, tracks, saves and unloads chunks..

    A library packed inside it changes 1 more game code file: TorqueAPI.

    Adds no new blocks, items or other content.

    Keeps all of vanilla Minecraft's textures, models and sounds.

    Often used with it

    See all 30
    sparkAPacket FixerAAttributeFixABadOptimizationsAChunkyA

    Details

    Creator
    PInk_Cats
    License
    GNU Lesser General Public License v2.1 or later
    Downloads
    327K
    Created
    12 Apr 2026
    Official pages
    Modrinth , CurseForge
    Links
    Source code , Issues , Discord

    Security

    No harmful code found

    We checked its files and read their code, without running it.

    What it can do on your computer

    Creates settings files
    The mod keeps its settings in the config folder of your game, where you can change or delete them. 1 file in your config folder.
    Connects to the internet
    It has code that can go online, for example to check for updates, load skins or send crash reports. No address written in the code is contacted by the code that runs. See Privacy

    Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.

    How we checked · All 9 latest files checked, last on 16 Oct 2026
    • FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.
      9 latest files: the newest file for each Minecraft version and loader. The answer above is about the 8 for recent versions. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
    • Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.
      Read without running it
    • Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.
      Nothing declared about your system outside the game.
    • Looked for, not foundWe looked for these in the file and did not find them.
      Folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.

    Privacy

    We found nothing it sends about you

    We read its code without running it: it contacts 1 web address while you play.

    Like any connection, each address it contacts sees your IP address.

    Why we show this: a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.

    How we checked · All 8 files read
    • Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.
      The code of all 8 files, for recent Minecraft versions. See each file in Releases
    • Address built while the game runsThe code builds this address while the game runs: it is not written in the file.
      Connects to game servers or other players.
    • Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.
      Nothing declared about crash reports, usage data or advertisements.

    AI

    AI was used for its code and images

    The author declares AI code on Modrinth.

    ChatGPT is named in the images in its files.

    We have not read its code history yet.

    No sign of AI in the game

    We found no AI service, AI library or AI model file in its code.

    Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.

    How we checked · 5 places read
    • Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.
      Declares AI code. No AI features declared.
    • Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.
      Not read yet
    • Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.
      Nothing found
      40 changelogs read
    • Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.
      Nothing found
    • Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.
      An image names ChatGPT in its image metadata icon.png
    • Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.
      No AI service, AI library or AI model file
      856 code files read

    Compatibility

    See all 151 files
    Fabric
    NeoForge
    Forge
    Quilt
    1.191.2126.1

    Point at or tap a version to see its loaders.

    Runs onWhere to install it: in your game, on the server, or both. As the author says on Modrinth.Needed in your game and on the server, or you cannot join.
    RequiresProjects you must also install for it to work. From the author's lists for its files for recent Minecraft versions, or from its project page.
    Fabric APIon FabricA
    OptionalProjects it can work with but does not need. The author lists them.Nothing
    IncludesProjects packed inside its files.Nothing
    Speed of updatesHow fast it gets a file for new Minecraft versions, on average, compared with similar projects. Not part of the grade.It got a file 60 days after Minecraft 26.2 came out. No file yet for Minecraft 26.3.

    Modpacks using this project

    Find modpacks with it

    47 modpacks include BandwidthOptimizer in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    Cave Horror Project 18.2M downloadslast version with it 1 Oct 2026Age of Fate564K downloadslast version with it 19 Oct 2026Monumental Experience471K downloadslast version with it 16 Aug 2026Jurassic World Reborn II438K downloadslast version with it 20 Oct 2026Project Infinity 0.1417K downloadslast version with it 13 May 2026Concatenation162K downloadslast version with it 19 Jun 2026TRACING LIGHT · DARK TIDE89K downloadslast version with it 7 Aug 2026Rhinocraft62K downloadslast version with it 21 Jun 2026Cataclysm Zombie Apocalypse33K downloadslast version with it 14 Sep 2026Mystic's Monstrosity - Greedy Edition30K downloadslast version with it 9 May 2026
    1 to 10 of 30123

    Often in the same modpacks

    Mods that modpacks often add together with BandwidthOptimizer. Share: how many of the modpacks with BandwidthOptimizer also have that mod.

    ProjectTypeShareGrade
    sparkAModin 77% of the modpacks with BandwidthOptimizerPacket FixerAModin 72% of the modpacks with BandwidthOptimizerAttributeFixAModin 72% of the modpacks with BandwidthOptimizerBadOptimizationsAModin 66% of the modpacks with BandwidthOptimizerChunkyAModin 64% of the modpacks with BandwidthOptimizerAllTheLeaks (Memory Leak Fix)AModin 62% of the modpacks with BandwidthOptimizerServer Performance - Smooth Chunk SaveAModin 62% of the modpacks with BandwidthOptimizerConnectivityAModin 62% of the modpacks with BandwidthOptimizerSodium Dynamic LightsCModin 62% of the modpacks with BandwidthOptimizerAmendmentsAModin 62% of the modpacks with BandwidthOptimizer
    1 to 10 of 30123

    Latest files

    The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.

    MinecraftLoaderVersionSecuritySendsRequires
    26.2·Fabric5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-fabric-26.2.jarSends: Nothing about youRequires:Fabric APIPassedOur checks found nothing harmful in this file. Its code was read too.
    26.2·NeoForge5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-neoforge-26.2.jarSends: Nothing about youRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.1.2·Fabric5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-fabric-26.1.2.jarSends: Nothing about youRequires:Fabric APIPassedOur checks found nothing harmful in this file. Its code was read too.
    26.1.2·NeoForge5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-neoforge-26.1.2.jarSends: Nothing about youRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.1·Fabric, Quilt5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-fabric-1.21.1.jarSends: Nothing about youRequires:Fabric APIPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.1·NeoForge5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-neoforge-1.21.1.jarSends: Nothing about youRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Fabric, Quilt5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-fabric-1.20.1.jarSends: Nothing about youRequires:Fabric APIPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-forge-1.20.1.jarSends: Nothing about youRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    Older Minecraft versions
    1.19.2·Forge5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-forge-1.19.2.jarSends: Nothing about youRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    151 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    26.2The latest file for its Minecraft version and loader·NeoForge5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-neoforge-26.2.jar (main file)Beta·12 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 9.0 MB
    26.1.2The latest file for its Minecraft version and loader·NeoForge5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-neoforge-26.1.2.jar (main file)·12 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.0 MB
    1.21.1The latest file for its Minecraft version and loader·NeoForge5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-neoforge-1.21.1.jar (main file)·12 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.0 MB
    1.20.1The latest file for its Minecraft version and loader·Forge5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-forge-1.20.1.jar (main file)·12 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.1 MB
    1.19.2The latest file for its Minecraft version and loader·Forge5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-forge-1.19.2.jar (main file)·12 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.1 MB
    26.2The latest file for its Minecraft version and loader·Fabric5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-fabric-26.2.jar (main file)Beta·12 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 9.0 MB
    26.1.2The latest file for its Minecraft version and loader·Fabric5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-fabric-26.1.2.jar (main file)Beta·12 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 9.0 MB
    1.21.1The latest file for its Minecraft version and loader·Fabric, Quilt5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-fabric-1.21.1.jar (main file)·12 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.0 MB
    1.20.1The latest file for its Minecraft version and loader·Fabric, Quilt5.10.32.1405.10.32.140 · BandwidthOptimizer-5.10.32.140-fabric-1.20.1.jar (main file)·12 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.0 MB
    26.2·NeoForge5.10.32.1395.10.32.139 · BandwidthOptimizer-5.10.32.139-neoforge-26.2.jar (main file)Beta·7 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 9.0 MB
    26.1.2·NeoForge5.10.32.1395.10.32.139 · BandwidthOptimizer-5.10.32.139-neoforge-26.1.2.jar (main file)·7 Oct 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.0 MB
    1.21.1·NeoForge5.10.32.1395.10.32.139 · BandwidthOptimizer-5.10.32.139-neoforge-1.21.1.jar (main file)·7 Oct 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.0 MB
    1.20.1·Forge5.10.32.1395.10.32.139 · BandwidthOptimizer-5.10.32.139-forge-1.20.1.jar (main file)·7 Oct 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.1 MB
    1.19.2·Forge5.10.32.1395.10.32.139 · BandwidthOptimizer-5.10.32.139-forge-1.19.2.jar (main file)·7 Oct 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.1 MB
    26.2·Fabric5.10.32.1395.10.32.139 · BandwidthOptimizer-5.10.32.139-fabric-26.2.jar (main file)Beta·7 Oct 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 9.0 MB
    26.1.2·Fabric5.10.32.1395.10.32.139 · BandwidthOptimizer-5.10.32.139-fabric-26.1.2.jar (main file)Beta·7 Oct 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 9.0 MB
    1.21.1·Fabric, Quilt5.10.32.1395.10.32.139 · BandwidthOptimizer-5.10.32.139-fabric-1.21.1.jar (main file)·7 Oct 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.0 MB
    1.20.1·Fabric, Quilt5.10.32.1395.10.32.139 · BandwidthOptimizer-5.10.32.139-fabric-1.20.1.jar (main file)·7 Oct 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.0 MB
    26.2·NeoForge5.10.30.1345.10.30.134 · BandwidthOptimizer-5.10.30.134-neoforge-26.2.jar (main file)Beta·20 Sep 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 9.0 MB
    26.1.2·NeoForge5.10.30.1345.10.30.134 · BandwidthOptimizer-5.10.30.134-neoforge-26.1.2.jar (main file)·20 Sep 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.0 MB
    1 to 20 of 15112345…8

    Quick fixes

    In the last 2 years, 15 releases needed a quick fix: a new release within 3 days to fix a problem. This lowers the grade by 7 points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.15

    • 1.20.1-5.10.30.104-fabric24 Aug 2026v5.10.30.104-release 1. Fixed streaming epoch transitions that could disconnect clients…
    • 1.19.2-2.8.16.35-forge and 1 other release8 Jun 2026…raw and actual traffic to the server HUD. 3. Fixed server HUD raw-flow totals to include pre-encode Create…
    • 1.20.1-2.8.16.36-fabric8 Jun 2026v2.8.16.36-release hotfix 1. Fixed oversized transport batch flushes that could…
    • 1.20.1-2.7.8.18-fabric23 May 2026…dynamic structure payload boundary handling. 3. Fixed Create update visibility checks on moving dynamic…
    • 1.20.1-2.7.6.11-fabric14 May 2026…Velocity server-switch transport stability. 2. Fixed TrueUUID login compatibility issues. 3. Reduced Netty IO…
    • 1.20.1-2.7.6.7-fabric13 May 2026…as Quilt-compatible on publishing platforms. 3. Fixed chunk cache reuse after returning to the multiplayer…
    • 1.20.1-2.7.6.6-forge12 May 2026…Fabric 1.20.1, and Fabric 1.21.1 support. 2. Fixed chunk cache reuse after returning to the multiplayer…
    • 1.20.1-2.6.5.2-forge and 1 other release11 May 2026…HUD stats. v2.6.4.1-release 1. Fixed severe memory growth in template dictionary and chunk…
    • 1.21.1-2.6.4.1-neoforge9 May 2026v2.6.4.1-release 1. Fixed severe memory growth in template dictionary and chunk…
    • 2.5-beta5 May 2026v2.5-beta 1. Fixed chunk cache reuse after repeated Nether portal travel…
    • 1.20.1-1.3-beta17 Apr 2026…through the internal batch/zstd pipeline. 4. Fix chunk cache HUD and telemetry bandwidth display. 5…
    • 1.20.1-1.2-release15 Apr 2026…new whitelist classes to the algorithm. 2. Fix #2 (Chunk cache use problem). 3. Fix the debug problem…
    • 1.20.1-1.1-release13 Apr 2026v1.1-release 1. Fix monitor problem. 2. Fix whitelist mistake(improve 5%…