Sledgehammer
ModFixes bugs and problems in modded game clients and servers.
Why gradeD
How grades workStrengths
Points lost
- No release in 2.5 years−16 points
- No file for a Minecraft version most modpacks use−9 points
- Some modpacks removed it−1 point
All 11 criteria
Maintenance
21 points lost6 / 27Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.2.5 years ago (15 Apr 2024). 41 modpacks released in the last 6 months still include it, so it keeps 48% of these points. 6 / 12Supports 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.1.16.5 on Forge. About 5.7 years behind popular modding versions. Latest Minecraft: 26.3. Abandoned: no release for 2.5 years; no file for a popular modding version; no recent human commit.0 / 9Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.No release in the last 24 months 0 / 6Stability
1 point lost14 / 15Removed 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.34 of the 298 modpacks with two or more versions removed it in a later one (11%) See the 34 modpacks9 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Not measured yet.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 / 5Transparency
Full points10 / 10Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · LXGaming/Sledgehammer 7 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · LXGaming/Sledgehammer 3 / 3Popularity
Full points4 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.8,368,931 4 / 4Track record
4 points lost4 / 8AgeHow long the project has existed. It counts less when no new file came out recently.7.5 years, 37 releases 4 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in both latest files. See Security
38 of the 64 points that apply = 59 out of 100.
About
Sledgehammer is a configurable patch mod that uses SpongePowered Mixin to address bugs, compatibility problems, and exploits in Minecraft and Forge mods, with support for Forge, SpongeForge, and SpongeVanilla. Its client and shared fixes include speeding up server connections by disabling SearchTree reloading, allowing longer WorldType names, preventing crashes from invalid translation keys, and making LazyLoad thread-safe. On servers, it addresses advancement errors and reloads, biome lookup crashes, unwanted grass and ice changes, weather interference from Totemic, network usage, shutdown deadlocks, and concurrent player-chunk map changes. For chunk-save failures, it alerts players, removes entities, tile entities, and blacklisted items from the affected chunks, then creates a crash report and safely stops the server. It also blocks or removes items attempting to teleport between dimensions, limits books to 50 pages of 255 characters each, and fixes several packet-related exploits, including a player-kick exploit and an item-spawn exploit involving ProjectRed. Additional Sponge-specific fixes include enforcing permission checks for OP commands, addressing Misty World portal issues, and preventing movement beyond the world border and blank death messages.
Written from Modrinth and CurseForge . How we write it
In-game changes
It has no file for a recent Minecraft version. This is about its files for Minecraft 1.12.2 to 1.16.5.
Changes the game's code in 12 areas: Rendering and graphicsChanges 10 game code files in this area: drawing mobs, items, particles and textures on screen., Networking and multiplayerChanges 5 game code files in this area: connections, the server list and what is sent between your game and a server., Blocks and fluidsChanges 5 game code files in this area: how blocks, fluids and redstone work., Mobs and their behaviorChanges 4 game code files in this area: mobs, animals, villagers, projectiles and how they move and act., Game coreChanges 4 game code files in this area: the main loop, lighting and other code the whole game uses., Server and world logicChanges 3 game code files in this area: the world, commands, scoreboards, saved data and game rules., Chunk loading and storageChanges 2 game code files in this area: how the game loads, tracks, saves and unloads chunks., Inventory and itemsChanges 2 game code files in this area: items, chests and other containers, crafting and enchanting., Game data and resourcesChanges 2 game code files in this area: recipes, tags, advancements, language files and other game data., World generationChanges 1 game code file in this area: terrain, biomes and structures made when new land is created., World renderingChanges 1 game code file in this area: drawing the terrain, sky, clouds and weather. and Other game codeChanges 2 game code files in this area: game code that is not in one of the areas above..
Adds no new blocks, items or other content.
Keeps all of vanilla Minecraft's textures, models and sounds.
Often used with it
See all 30Details
- Creator
- LXGaming
- License
- Apache License 2.0
- Downloads
- 8.4M
- Created
- 10 Apr 2019
- Official pages
- Modrinth , CurseForge
- Links
- Source code , Issues
Security
No harmful code found
It has no file for a recent Minecraft version. This is about its files for Minecraft 1.12.2 to 1.16.5.
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 web address is written in its code. 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
- 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.2 latest files: the newest file for each Minecraft version and loader. None is for a recent Minecraft version, so the answer above is about all of them. 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.
- Modrinth and CurseForgeA release with a different file on Modrinth and on CurseForge, whose code is not the same. Each file is checked on its own. Nothing is blocked.Minecraft 1.12.2 · Forge · release 2.0.20 · 23 Aug 2022: Modrinthcode differs in 1 release
Sledgehammer-1.12.2-2.0.20.jar, CurseForgeSledgehammer-1.12.2-2.0.20.jar. 1 class changed, in io.github.lxgaming.sledgehammer.util.text:EmptyTextComponent.
Privacy
We found nothing it sends about you
It has no file for a recent Minecraft version. This is about its files for Minecraft 1.12.2 to 1.16.5.
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
- 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 both files, for Minecraft 1.12.2 to 1.16.5. 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.Purpose not known.
- 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
No sign that AI was used to make it
We looked for AI tools in its texts, files, images and code history and found none.
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
- 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.No AI content or AI features declared.
- Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.Nothing found
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found2 of 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.Nothing found1 image read
- 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 file808 code files read
Compatibility
See all 37 filesPoint at or tap a version to see its loaders.
Related projects
Projects that need Sledgehammer to work.
Modpacks using this project
Find modpacks with it| Oct 2024 | 25 |
|---|---|
| Nov 2024 | 16 |
| Dec 2024 | 14 |
| Jan 2025 | 15 |
| Feb 2025 | 15 |
| Mar 2025 | 28 |
| Apr 2025 | 21 |
| May 2025 | 22 |
| Jun 2025 | 22 |
| Jul 2025 | 20 |
| Aug 2025 | 19 |
| Sep 2025 | 12 |
| Oct 2025 | 16 |
| Nov 2025 | 17 |
| Dec 2025 | 23 |
| Jan 2026 | 22 |
| Feb 2026 | 12 |
| Mar 2026 | 19 |
| Apr 2026 | 17 |
| May 2026 | 17 |
| Jun 2026 | 10 |
| Jul 2026 | 8 |
| Aug 2026 | 14 |
| Sep 2026 | 9 |
Fewer modpacks put it in their new versions than a year ago: 13 a month now, 19 a year agoThe average of the last 6 months, compared with the same 6 months a year before. We say it only when the change is large..
343 modpacks include Sledgehammer in at least one of their versions. Here are the 30 most downloaded.
Roguelike Adventures and Dungeons7.6M downloadslast version with it 15 May 2026
Roguelike Adventures and Dungeons 24.8M downloadslast version with it 1 Oct 2026
Dungeons, Dragons and Space Shuttles3M downloadslast version with it 8 Oct 2020
Life in the village1.6M downloadslast version with it 27 May 2024
Last Days of Humanity1.4M downloadslast version with it 29 May 2024
Life in the village 2859K downloadslast version with it 6 Dec 2022
Volcano Block859K downloadslast version with it 2 Nov 2024
Engineer's Life759K downloadslast version with it 7 Nov 2023
Optimized fps732K downloadslast version with it 7 Aug 2025
Antimatter Chemistry617K downloadslast version with it 3 Nov 2024Often in the same modpacks
Mods that modpacks often add together with Sledgehammer. Share: how many of the modpacks with Sledgehammer also have that mod.
ChiselCModin 63% of the modpacks with Sledgehammer
FoamFixCModin 60% of the modpacks with Sledgehammer
RandomPatches (Forge)-Modin 59% of the modpacks with Sledgehammer
Inventory Tweaks [1.12 only]-Modin 56% of the modpacks with Sledgehammer
BetterFpsCModin 54% of the modpacks with Sledgehammer
Cooking for BlockheadsAModin 52% of the modpacks with Sledgehammer
Thermal FoundationCModin 50% of the modpacks with Sledgehammer
Immersive EngineeringCModin 50% of the modpacks with Sledgehammer
FTB Backups (Forge)DModin 49% of the modpacks with Sledgehammer
FastFurnaceBModin 49% of the modpacks with SledgehammerLatest files
The newest file for each Minecraft version and loader. None is for a recent Minecraft version. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.