BROWSER_SIDE_MODPACK_CONVERTER

MRPack to ZIP Converter

Convert Modrinth .mrpack files into a standard ZIP package. The tool reads modrinth.index.json, copies overrides, downloads referenced files, and builds the ZIP in your browser.

If you searched for mr pack to zip, this is the same file format most launchers write as MRPACK or .mrpack.

.MRPACK -> .ZIP / LOCAL_PROCESSING

Choose .mrpack file

Drag and drop a Modrinth pack here. The archive is opened locally and parsed in your browser.

DIRECT_URL_INPUT

CONVERSION_STATUS

IDLE_STANDBY

Pack Name

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Version

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Minecraft

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Loader

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Referenced Files

Overrides

PROCESSING_QUEUE0%

Upload a .mrpack file to start.

Runs in browser

Reads modrinth.index

Copies overrides

Downloads referenced files

CONVERSION_PIPELINE

What the converter actually does

An MRPACK file is already a ZIP archive, but it usually does not contain every mod JAR. It contains a manifest that tells launchers which files to download. This converter reads that manifest, copies config overrides, downloads the referenced files, and rebuilds a regular ZIP.

STEP_01

Read modrinth.index.json

The tool validates the MRPACK archive and extracts the manifest that lists Minecraft, loader, files, hashes, and download URLs.

STEP_02

Copy overrides

Files from overrides and client-overrides are copied into the output ZIP so configs, resource packs, and extra files stay with the pack.

STEP_03

Download referenced mods

Your browser downloads each file referenced by the manifest and places it at the path expected by a regular ZIP modpack.

STEP_04

Export ZIP

The final ZIP is generated locally and downloaded as a browser blob. If a file fails, a FAILED_DOWNLOADS.txt report is included.

FORMAT_CHECK

Why renaming .mrpack to .zip is not enough

Renaming the file lets you inspect the archive, but it does not download the actual mod files referenced by the manifest. If your launcher needs a full ZIP with a mods/ folder, you need a real conversion step.

BAD_PATH

Rename only

Useful for inspecting the archive, but it usually leaves you with metadata and overrides rather than a complete playable pack.

BEST_IF_SUPPORTED

Native launcher import

Best when your launcher supports MRPACK directly, such as Prism Launcher, ATLauncher, or compatible Modrinth workflows.

THIS_TOOL

MRPack to ZIP conversion

Best when you need a regular ZIP structure for manual installs, server prep, or launchers that do not understand MRPACK.

SCOPE_DECLARATION

What this MRPack converter can and cannot do

MRPACK conversion depends on the files and download URLs inside the Modrinth manifest. This page is intentionally explicit about the limits so you know when to use the tool and when a launcher import is a better choice.

Supported

Parse a valid Modrinth .mrpack archive.
Read modrinth.index.json and show pack metadata.
Copy overrides, client-overrides, and server-overrides into the output ZIP.
Download files listed in the manifest when the browser is allowed to fetch them.
Include FAILED_DOWNLOADS.txt when a file cannot be fetched.

Not supported

Convert CurseForge manifest packs.
Bypass CORS rules or private download permissions.
Guarantee every old third-party file URL still exists.
Import directly into a launcher account.
Modify Minecraft, loader, or mod versions for compatibility.

CONVERSION_ERRORS

Common MRPack conversion errors

Most MRPACK to ZIP problems come from the archive structure or the download URLs inside modrinth.index.json. These are the cases to check before assuming the modpack itself is broken.

INVALID_ARCHIVE

Invalid MRPACK file

A .mrpack file should be a ZIP archive. If the browser cannot open it, download the pack again and make sure the file extension is still .mrpack.

MISSING_INDEX

Missing modrinth.index.json

The converter needs modrinth.index.json at the root of the archive. Without it, there is no manifest telling the tool which files to copy or download.

FAILED_DOWNLOADS

Some mod files failed to download

Old URLs, removed files, blocked hosts, or temporary network issues can stop a referenced JAR from downloading. Check FAILED_DOWNLOADS.txt inside the output ZIP.

CORS_BLOCKED

Browser blocked a download

Some third-party hosts do not allow browser-based downloads from other sites. The converter cannot bypass CORS; manually download those files if needed.

NO_MODS_FOLDER

ZIP has no mods folder

Some MRPACK files only contain overrides, or every referenced file failed to download. A native MRPACK import may work better when the host blocks browser downloads.

LARGE_PACK

Large modpack feels slow

The conversion runs in your browser memory. Very large packs may take longer, especially when many files must be downloaded and zipped at once.

FAQ_NODES

MRPack to ZIP FAQ

Is this MRPack to ZIP converter free?

Yes. The converter runs in your browser and does not require signup, payment, or server-side upload.

Does the tool upload my .mrpack file?

No. The MRPACK archive is read locally in your browser. The browser may still request mod files from the URLs listed inside modrinth.index.json.

Why do some files fail to download?

Some download hosts block browser requests with CORS, remove old files, or require network access your browser cannot provide. Failed files are listed in FAILED_DOWNLOADS.txt.

Can I convert CurseForge packs to MRPACK here?

No. This first version focuses only on converting Modrinth .mrpack files to ZIP. CurseForge packs use a different manifest format.

Which launchers need a ZIP file?

Some manual setups, server workflows, and launchers without native MRPACK support may need a regular ZIP. If your launcher supports MRPACK directly, native import is usually simpler.

Is "mr pack to zip" the same as "mrpack to zip"?

Usually yes. The Modrinth modpack file format is written as MRPACK or .mrpack, but some people search for it as "mr pack". This tool is for converting .mrpack files to ZIP.