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Last Tick Jump

by darrylTung1

Last Tick Jump is a Fabric client mod that makes the player jump automatically on the last game tick before walking off a ledge while sprinting.

FabricClient-side onlyMIT LicenseOpen source1.20.1 – 1.20.6

What it does

When the player sprints toward an edge, the mod triggers a jump on the final tick before the character would step off. Sprint momentum carries through the jump, so the landing keeps the same speed and direction. The effect is applied to local input only, which is why the mod runs on the client alone and does not change anything a server has to validate.

The feature is meant for parkour and edge jumps, where manual timing is hard to hit. A toggle bound to the J key switches the behavior on or off, and the key can be remapped in the controls menu. Last Tick Jump is built for the 1.20.1 release, and it needs Fabric Loader at version 0.16.10 or newer together with Fabric API, build 0.90.7+1.20.1. Files exist for 1.20.1 – 1.20.6, with 1.0.0 for 1.20.6 as the latest release, published on 2026-03-31 under the MIT License. The source code is public.

Key features

  1. Automatic edge jump

    A jump fires on the last tick before a sprinting player walks off an edge, without any key press.

  2. Sprint momentum kept

    Speed and direction are preserved through the jump, so the landing continues the sprint.

  3. Toggle on and off

    The J key turns the automatic jump on or off, and the binding can be changed in the controls screen.

  4. Client-side input only

    The behavior comes from local input, so servers do not need to run any part of the mod to see it.

Compatibility

Latest build for each game version and loader.

1.20.61.0.0
1.20.51.0.0
1.20.41.0.0
1.20.31.0.0
1.20.21.0.0
1.20.11.0.0
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

Use cases

Parkour courses

Players crossing gaps between blocks can chain edge jumps without judging the exact tick for each one.

Sprint travel

Long sprints across broken terrain keep their speed when a drop is crossed.

Who it’s for: Players who run parkour maps or cross terrain with gaps while sprinting, on single-player worlds or on servers, since only the client needs the mod.

How it compares

Full comparison

Better Auto-Jump is a Fabric client mod for 26.2, open source under the MIT License. Auto Move is also client-side only and uses the CC0 1.0 Universal license, but it targets 26.1 and is not open source. Last Tick Jump covers 1.20.1 – 1.20.6 and is also open source under the MIT License.

ModLoadersGame versionsEnvironmentUpdated
Last Tick JumpFabric1.20.1 – 1.20.6Client-side only2026-03-31
Better Auto-JumpFabric26.2Client-side only2026-06-30
Auto MoveFabric26.1Client-side only2026-04-03

Questions

Does Last Tick Jump need Fabric API?

Yes. Fabric API, specifically build 0.90.7+1.20.1, has to be present for the mod to load, and the loader must be Fabric Loader 0.16.10 or above.

Does the server need Last Tick Jump installed?

No. It is installed on the player's side alone, so servers need nothing.

Can the automatic jump be turned off?

Yes. The J key toggles it, and the key can be rebound in the controls menu.

What the author says

A Fabric client-side mod for Minecraft 1.20.1 that automatically jumps at the last tick before the player walks off an edge while sprinting. Designed for parkour to optimize edge jumps without manual timing. The output JAR will be at build/libs/lasttickjump-1.0.0.jar.
darrylTung1, on the Modrinth page

Official listing

Owner
darrylTung1
Published
2026-03-31
Updated on Modrinth
2026-03-31
Facts verified
2026-10-15
Open on ModrinthCompare