
TT20 (TPS Fixer)
I don't know my version or loader

TT20
TT20 helps reduce lag by optimizing how ticks work when the server's TPS is low.
Regarding singleplayer
Singleplayer should work fine! You can use the mod on the client without problems.
🤔 What does TT20 stand for?
TT20 is an abbreviation of the ticks*tps/20 formula. It's used to calculate the amount of ticks something takes, while taking the TPS into account.
⚠️ Caveats
TT20 only fixes the symptoms of TPS lag, not the actual lag. It re-calculates the amount of ticks things take. For example, when you're breaking a block it takes the original break time, multiplies it by ticks and divides it by 20 (the maximum TPS). This ensures that the end user feels almost no lag, even if the TPS is very low.
⚙️ Roadmap
Finished
- Block break delay
- Eating delay
- Item pickup delay
- Block entity tick acceleration (experimental, off by default)
- Portal delay
- Sleeping delay
- Potion delay
- Fluid spread speed
- Random tickspeed acceleration
- Day/nighttime acceleration
- Bow/crossbow acceleration
- Mob grow/breed timer acceleration
- TNT acceleration (off by default)
- Disabled vanilla lagback
If you believe there is features missing, please tell us by creating a new issue
(yes, also if you want compatibility with other mods!)
🔌 Supported versions
| TT20 | Fabric/Quilt | Forge | NeoForge |
|---|---|---|---|
| 26.X | ✅ | ❌ | ✅ |
| 1.21.11 | ✅ | ❌ | ✅ |
| 1.21.9/10 | ✅ | ❌ | ✅ |
| 1.21.2-8 | ✅ | ❌ | ✅ |
| 1.21(.1) | ✅ | ❌ | ✅ |
| 1.20.5/6 | ✅ | ❌ | ✅ |
| 1.20.2-4 | ✅ | ❌ | ✅ |
| 1.20(.1) | ✅ | ✅ | ❌ |
| 1.19.2 | ✅ | ✅ | ❌ |
| 1.18.2 | ❌ | ✅ | ❌ |
| 1.16.5 | ❌ | ⏳ | ❌ |
| 1.12.2 | ❌ | ✅ | ❌ |
| 1.8.9 | ❌ | ⏳ | ❌ |
| 1.7.10 | ❌ | ⏳ | ❌ |
| 1.6.4 | ❌ | ⏳ | ❌ |
✅ - Supported ⏳ - Planned/WIP ❌ - Unsupported
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 26.1, 26.1.1, 26.1.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as tt20-0.8.4+mc26.1.1-neoforge.jar — drop this file into the mods folder
- Download size: 669 KB
- Download link checked 26 Aug 2026 — working
These come from our own check of the pack file, not from the source page.
