Project and methodology
About MRPack Converter
MRPack Converter is an independent, free browser utility for inspecting Modrinth modpacks and creating a standard ZIP when a launcher, server panel, or manual workflow cannot use the original MRPack file.
How conversion works
- The browser opens the uploaded archive and reads
modrinth.index.json. - The tool validates paths, file counts, archive size, and supported manifest fields.
- Referenced files are requested from approved HTTPS download sources.
- Available files and bundled overrides are written into a new ZIP in the browser.
- Blocked or unavailable downloads are recorded in a report for manual review.
Privacy and security
A locally selected MRPack is read by JavaScript in the browser and is not uploaded to an MRPack Converter server. Referenced mod files are requested directly from their listed sources. Direct URL input is restricted to approved Modrinth CDN hosts, and archive paths are checked before files are written to the output.
What the tool does not guarantee
- A remote host may block browser requests or remove an older mod version.
- A generated ZIP may be incomplete when the conversion report lists failed downloads.
- Conversion does not change the required Minecraft or mod-loader version.
- A generic ZIP is not automatically a launcher-specific instance or a ready server.
- The project is not affiliated with Modrinth, Mojang, Microsoft, or Prism Launcher.
Sources used in the documentation
- Modrinth modpack format documentation
- Prism Launcher modpack import documentation
- Public usage, privacy, troubleshooting, and project documentation
Report a problem
Reproducible bug reports and compatibility findings can be submitted through the public issue tracker. Do not upload private modpacks, credentials, or licensed files to an issue.