Step-by-step setup
Open your modpack
In the dashboard, open the modpack you want — it has a file manager with all your mods and configs.
Make your changes
Add, replace or remove mods. Pull them from Modrinth/CurseForge or upload your own .jar files.
Publish
Publishing creates a new snapshot of the modpack — Spixy works out which files changed on its own.
Players get the update
On the next launch, the launcher compares files and downloads only the difference. No full re-download and no rebuilding the launcher.
Features
File-by-file sync
Only what actually changed gets downloaded.
Removed files cleaned up
A mod you delete is removed from players too — the set always matches.
No launcher rebuild
The launcher itself never needs updating, only the modpack's contents.
Instant for everyone
Hit Publish and the update is available to every player right away.
Questions and answers
Do players need to do anything?
No. They just launch the launcher — it compares files and downloads the changes on its own before joining the server.
What if I remove a mod?
Managed folders sync file by file: a removed mod is deleted on players' machines too, so their set matches the server.
Do players need to re-download the launcher when mods change?
No. Even new versions of the launcher itself install automatically on the next start.
Modpack auto-updates are a core Spixy feature — and they come with a branded launcher, a project website, a donation store and RCON, all with no code.
Now set up your project
Start with a free account. Plan features and limits are listed on the home page.