Usage is entirely browser-based — no installation needed.

1. Go to https://plugcheck.dev
2. Drop one or more plugin .jar files onto the drop zone, or type a plugin name in the search box and select from the autocomplete results.
3. Choose your target Minecraft version from the version selector.
4. Select your server platform (Paper/Spigot or Fabric/Forge).
5. Click "Check Compatibility."

Results table shows:
- Each plugin's name and current version
- Whether it has a release for the selected MC version
- Compatibility status (Compatible / Incompatible / Unknown)
- Any known conflicts between plugins in your list

No account, no upload, no install. The .jar parser runs entirely client-side.