Fly Hack
by Mike
Fly Hack lets players fly in survival and creative worlds on a Fabric server, without changing game modes or constantly adjusting flight speed.
What it does
Players who join a server running Fly Hack gain flight through a boost that counts several times, so flight can be used in place of creative mode for getting around. Its author says the flight was not the original intention and came from testing another mod, but that the boost is genuinely useful for building. The mod is server-side only, so players join without installing it, and the server owner needs it on the server to run it.
Fly Hack requires Fabric API, and files are published for Fabric only across 15 release versions, 1.17 – 1.20.4. The latest Fabric file, 1.0.0+1.19-1.20.4 for 1.20.4, was published on 2025-09-12, and the first release came out on 2025-09-11. The code is released as All rights reserved, so the author keeps the rights to it.
Key features
Flight without mode switches
Flight works without switching game modes, so a player can move through the world in any survival or creative game.
Boost counts
The boost counts several times before it recharges, which adds flight speed when crossing large spaces.
Server-side install
Only the server needs the mod, so clients connect with nothing added to their game.
Flight speed without adjustment
Flight speed does not need to be set again, so players fly at the same pace every time they take off.
Gallery
Compatibility
Latest build for each game version and loader.
1.20.x5 of 5 versions with builds
1.19.x5 of 5 versions with builds
1.18.x3 of 3 versions with builds
1.17.x2 of 2 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Building
The boost helps when moving between distant parts of a large build and covering areas quickly.
Creative-style movement in survival
Players in survival worlds can cross terrain by air without reaching creative mode.
Who it’s for: Server owners who want fast movement for builders and players, and players on servers that choose to run the mod. Because the code is under All rights reserved, reuse and redistribution are not covered by an open license.
How it compares
Fly Command is a client-side only Fabric mod under the MIT License, built for 1.20.4, so it changes flight on the player's own side and does not touch the server. Server-Side Fly Mod is also server-side only and is licensed as All rights reserved, but it targets 1.21.4 – 1.21.5. Elytra Aeronautics needs both client and server, uses 1.18.1 – 1.20.4 and is licensed under Creative Commons Attribution Non Commercial Share Alike 4.0.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Fly Hack | Fabric | 1.17 – 1.20.4 | Server-side only | 2025-09-12 |
| Fly Command | Fabric | 1.20.4 | Client-side only | 2024-03-29 |
| Server-Side Fly Mod | Fabric | 1.21.4 – 1.21.5 | Server-side only | 2025-04-08 |
| Elytra Aeronautics | Fabric | 1.18.1 – 1.20.4 | Client and server | 2024-01-27 |
Questions
Does Fly Hack need Fabric API?
Do players need Fly Hack installed?
Which versions does Fly Hack support?
Is Fly Hack under an open license?
In the catalog
Fly Hack is one of 3,932 Transportation mods on ModsFinder, and one of 2,390 Transportation mods for Fabric. 13,907 mods support Minecraft 1.20.4.
More from Mike
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What the author says
This mod doesn't work on any server and the server must have this mod installed server-side for it to work on the client, I do have a version that doesn't need the server-side mod but it is not publicly available. While it can be abused for flight, that wasn’t the original intention - I actually stumbled upon it by…
Official listing
- Modrinth page
- modrinth.com/mod/fly-hack
- Owner
- Mike
- Published
- 2025-09-11
- Updated on Modrinth
- 2025-09-12
- Facts verified
- 2026-10-15