Just Another Speedometer Mod (JASM)
Ever wondered exactly how fast your character is sprinting across the plains, or whether that ice boat highway is really hitting its theoretical top speed? The just another speedometer mod (jasm) answers that question with a simple on-screen readout that tracks how quickly you move. It is a small, focused add-on that does one job well, and for players who enjoy measuring their builds, farms, and redstone contraptions, that is more than enough.
What the Mod Actually Does
At its core, JASM displays your current movement speed directly on your HUD. Instead of guessing whether a horse is faster than a minecart on your particular track layout, you get a live number that updates as you walk, sprint, fly, or ride. The mod is intentionally lightweight, so it will not fight for resources with shaders, minimaps, or other interface mods you already run.
One thing worth knowing upfront: the author openly warns that the readout can be inaccurate or fluctuate when the server is running at a low tick rate. On a laggy server, your displayed speed may jump around. That is not a bug in the mod so much as a limitation of measuring movement on a struggling tick loop. On a healthy singleplayer world or a well-optimized server, the numbers stay steady and useful.
Supported Versions and Loader
The just another speedometer mod (jasm) for Minecraft is built for Forge and does not work with Fabric. That distinction matters, because plenty of performance and utility mods have moved to Fabric-first development, and players sometimes assume everything is cross-compatible. If you run a Fabric profile, this mod simply will not load.
Version support centers on Minecraft 1.16 through 1.18. The developer notes that it may function on other builds within that range, but if something breaks, you are encouraged to report it with the understanding that fixes are not guaranteed. A 1.19.1 port has been mentioned as pending, though other projects have delayed it. In short, if you are on a modern 1.19 or 1.20 setup, check the project page before assuming compatibility.
How to Install
Installation follows the standard Forge routine, so if you have added mods before, this will feel familiar.
- Confirm you are running a Forge profile for Minecraft 1.16 to 1.18.
- Place the downloaded
.jarfile into yourmodsfolder. - Launch the game and check that the speedometer appears on your HUD.
- If you are updating from version 5 to 5.0.1 or newer and the game crashes, delete the
speedometer-client.tomlconfig file before reporting the problem.
That last step catches a lot of people out. The old config file is defective, and removing it resolves the crash in most cases. The author specifically asks players to try this before filing an issue, which is a reasonable request given how often it comes up. If you want to download just another speedometer mod (jasm), grab it from the project page the developer has since moved to, and read the changelog for your target version.
For players who prefer a hands-off approach, the foxygame.net launcher bundles just another speedometer mod (jasm) into its add-on catalog, letting you enable it with a single click instead of manually juggling jar files and config folders. It also handles version matching automatically, so you spend less time troubleshooting Forge builds and more time actually playing.
Practical Uses
Speed measurement sounds like a novelty until you start building around it. A few situations where the readout genuinely helps:
- Testing ice boat tunnels and comparing designs against each other.
- Verifying that a mob farm's water streams push entities at the intended rate.
- Checking whether a horse's speed attribute is actually paying off on your roads.
- Measuring elytra glide efficiency with different firework durations.
- Confirming that a piston-based transport system moves at the speed you designed for.
Because the mod is client-side and unobtrusive, it slots neatly into existing modpacks. The author explicitly permits use in modpacks, which is a welcome stance for pack developers who want a clean utility mod without licensing headaches.
Final Thoughts
The just another speedometer mod (jasm) is not trying to be a sprawling overhaul. It is a single-purpose tool for players who like hard numbers behind their movement. The Forge-only requirement and the 1.16 to 1.18 focus limit its reach, and the low-TPS fluctuation is a genuine caveat, but neither undermines what the mod sets out to do. If you are on a supported version and want to know exactly how fast you are going, this is a clean, lightweight answer.