Is an MRPack file the same as a ZIP file?

MRPack is ZIP-based, but it is not always a complete ZIP of every mod file. Many MRPack files reference remote downloads in the manifest instead of bundling every JAR directly.

How do I get an MRPack file?

You usually get an MRPack file by downloading a Modrinth modpack export or pack file from a launcher or modpack page. A normal ZIP folder cannot safely become MRPack unless the required manifest metadata is present.

How do I use an MRPack file in Minecraft?

Import the MRPack into a compatible launcher such as Modrinth App or Prism Launcher. The launcher reads the manifest, downloads referenced mods, applies overrides, and creates the Minecraft instance.

What program opens an MRPack file?

Modrinth App and Prism Launcher can import MRPack files as Minecraft modpacks. Archive tools can inspect the file because it is ZIP-based, but they do not install referenced mods.

Is an MRPack file the same as a JAR file?

No. A JAR is usually an individual Java program or Minecraft mod. An MRPack is a modpack manifest and archive that describes many files, versions, dependencies, and overrides.

Format guide

What is an .MRPACK file and how do you use it?

Q: What is an MRPack file?

An MRPack file is the Modrinth modpack format for Minecraft. It is a ZIP-based archive that contains a modrinth.index.json manifest, dependency metadata, file hashes, download URLs, and optional override files.

An MRPack file is the Modrinth modpack format for Minecraft. It is a ZIP-based archive that tells a compatible launcher how to install a Minecraft modpack. It contains a modrinth.index.json manifest, dependencies, file hashes, download URLs, and optional overrides. It is not an individual mod JAR and may not contain every mod file until a launcher or converter downloads them.

Last updated: August 13, 2026 Maintained by MRPack Converter

Looking for the converter? Use the MRPack to ZIP converter when you already have a .mrpack file and need a standard ZIP output.

What should you do with an MRPack file?

Your goal	Best method	What happens
Play the modpack	Import it into Modrinth App or Prism Launcher.	The launcher downloads referenced mods and builds the instance.
Check versions and files	Use the MRPack Inspector.	You can read metadata without installing or converting the pack.
Upload to a server panel	Use the MRPack to ZIP converter.	Available remote files and overrides are placed into a standard ZIP.
Only inspect the raw archive	Open a copy with 7-Zip or another archive tool.	You will see the manifest and overrides, but remote mods remain missing.

Short answer: a .mrpack file is a Minecraft Modrinth modpack file. It is used by launchers to install a modpack from a manifest instead of storing every mod file directly.

What is an MRPack file?

An MRPack file is a portable description of a Minecraft modpack. It tells a compatible launcher which Minecraft version to use, which mod loader is required, which files belong in the pack, and where remote mod files can be downloaded. This is why an MRPack file can be small even when the final installed modpack contains many JAR files.

What is inside an MRPack file?

The most important file is modrinth.index.json. This manifest describes the pack name, format version, dependencies, and the files that should be present after the pack is installed. Each file entry can include a path, hashes, environment flags, and one or more download URLs.

Minecraft version: the game version the pack expects.
Loader dependency: Fabric, Forge, Quilt, NeoForge, or another loader.
File list: paths, hashes, environment rules, and download URLs.
Overrides: bundled files that should be copied into the instance root.

Why does MRPack use download URLs?

MRPack files are often compact because they do not always bundle every mod JAR. Instead, the manifest can point to approved remote files and let the launcher download them during import. This helps keep the pack small and makes it easier for a launcher to verify file hashes and choose the correct files for the target environment.

How do you open an MRPack file?

For normal play, import the original MRPack into a compatible launcher such as Modrinth App or Prism Launcher. If you only need to inspect the pack, use the MRPack Inspector. If you need a standard ZIP layout for a server panel, manual repair, or file transfer, use the MRPack to ZIP converter.

Is MRPack the same as JAR or ZIP?

No. A .jar file is normally one Java application or Minecraft mod. An MRPack describes an entire modpack and can reference many JAR files. MRPack is technically ZIP-based, but a normal ZIP has no requirement to contain Modrinth metadata. This is why changing a filename from .zip to .mrpack does not create a valid pack, and changing MRPack to ZIP does not automatically download its remote files.

How do you get an MRPack file?

You usually get an MRPack file by downloading a Modrinth modpack or exporting a pack from a launcher that supports the Modrinth format. If you only have a normal ZIP containing a mods folder, that ZIP does not automatically become MRPack. A valid MRPack needs the manifest fields, dependency data, file hashes, and download URLs that a launcher can read.

How do you use an MRPack file in Minecraft?

Use a compatible launcher first. Import the .mrpack file into Modrinth App, Prism Launcher, or another launcher that understands the format. The launcher reads modrinth.index.json, downloads referenced mods, applies overrides, and creates a playable Minecraft instance. If the launcher fails or you need a standard archive, then inspect the file or convert MRPack to ZIP.

When should you convert MRPack to ZIP?

Convert MRPack to ZIP when the target workflow does not accept .mrpack directly, when you need to inspect folders manually, or when browser-safe conversion can show which referenced downloads are missing. Do not assume a converted ZIP is the same as a launcher-native instance; it is a practical output format for inspection, repair, and transfer.

Related guides

Compare the formats in MRPack vs ZIP, learn how to open an MRPack file, or follow the MRPack to ZIP conversion guide. If you want to extract the archive manually, read how to unzip an MRPack file. If you have a CurseForge export instead, use the CurseForge ZIP to MRPack converter.