MineCaptcha
Vanilla compatible captcha test for minecraft java servers
- Loaders
- Fabric
- Downloads on Modrinth
- 303
- Followers on Modrinth
- 3
- versions
- 5
- Updated
- June 16, 2026Jun 16
- Published
- in 2025
At a glance
Install on the server only; players don't need it
MineCaptcha
Vanilla compatible captcha test for minecraft java servers designed to help prevent automated bots from joining your server
[!NOTE]
This is NOT a bulletproof solution for preventing bots from joining your server
INFO
This mod currently offers 2 different types of captchas that server owners can choose from
TEXT:
This mode has the player enter a simple string of displayed minecraft text
IMAGE:
This mode has the player enter numbers from a series of images presented to them, while this mode is more secure it also requires a bit more setup, see below for instructions
Image mode setup
- Run the server with this mod to generate the config file
- Edit the config file for this mod
minecaptcha.cfgsettingmethodtoIMAGE - Execute the mod as a java program to generate the resource pack and number image mappings
java -jar minecaptcha-x.x.x.jar- Setup
resourcepack.zipto be distributed as or combined with your server resource pack - Copy
captchaimage.jsoninto the config folder for your server It is a good idea to re generate this resource pack and json file with some regularity
note: when the resource pack is change it is REQUIRED to also changecaptchaimage.json.
FAQ
How to install MineCaptcha?
Install Fabric for your Minecraft version, download MineCaptcha for the same version and loader, put the file into the mods folder and launch the game with the loader profile.
Which Minecraft versions does MineCaptcha support?
MineCaptcha has builds for Minecraft 1.21.8–26.2.
Is MineCaptcha needed on the server?
Server only — players don't need to install it
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