How to Convert an .mrpack to a .zip (Free, In Your Browser)

If you downloaded a Modrinth modpack and ended up with a .mrpack file your launcher won't open, you're in the right place. This guide walks through turning that .mrpack into a plain .zip with every mod already bundled inside — in a few seconds, entirely in your browser.

What you'll need

• A Modrinth modpack: either its project ID, a direct download link, or the .mrpack file already saved on your device.
• A modern browser (Chrome, Firefox, Edge, Safari). Nothing to install.

Why convert at all?

A .mrpack is Modrinth's modpack format. It's a small file that lists mods by download URL rather than bundling them. That keeps it tiny, but many launchers and manual installs expect a plain .zip with the mod JARs already inside. Converting downloads every mod and packages it into one self-contained archive that installs anywhere. (Curious about the format itself? See What Is an .mrpack File?)

Step by step

1. Find your modpack on Modrinth. Open the project page for the pack you want.
2. Grab a source. Copy the project ID from the URL, right-click the green Download button to copy the .mrpack link, or download the .mrpack file directly.
3. Convert. Paste the project ID or link (or upload the file) into the converter and start it. Every mod is fetched and packaged automatically.
4. Download the .zip. Once packaging finishes, the ready-to-use archive downloads on its own.

A note on GitHub-hosted mods

A handful of mods are hosted on GitHub, which blocks in-browser downloads because of CORS. When that happens, the converter opens those download pages for you — just drop the files into the ZIP's mods folder manually. Everything else is bundled automatically.

Is it private?

Yes. The entire conversion runs locally — your modpack never leaves your device. The only network requests are to the public CDNs that host the mods, exactly the requests your launcher would make anyway.