Browser-native LZMA write isn't possible without a heavy WASM bundle, so this tool re-packages your ZIP as TAR.GZ — the closest format we can produce locally that ships to 7-Zip / Keka / WinRAR users without any native tooling. Output is bit-lossless.
Per-job file size, entry count, and batch caps for ZIP → 7Z. Limits apply to every Archive tool in JAD Apps; upgrade for larger uploads and bigger batches.
| Tier | Max archive size | Max entries / archive | Max files per batch |
|---|---|---|---|
| Free | 47.7 MB | 500 | 1 |
| Pro | 476.8 MB | 50,000 | 20 |
| Developer | 1.86 GB | 50,000 | 20 |
Drop your ZIP archive — entries are decompressed locally with fflate
Re-packed as a TAR archive then GZIP-compressed (level 6) — produces a .tar.gz
Download the TAR.GZ — opens in 7-Zip, Keka, WinRAR, and tar without extra tools
0 bytes uploaded. ZIP to 7Z Converter (TAR.GZ Fallback) runs entirely in your browser using fflate, zip.js, and libarchive WASM. Your archive files never leave your device.
Browser-side 7Z writing needs a WASM LZMA encoder (~600 KB). To keep page weight low and avoid a new dependency, this tool re-packages as TAR.GZ — universally readable and lossless. We'll switch to native 7Z once libarchive.js or another zero-dep encoder ships LZMA write support.
For source code and text: typically within 5–15% of 7Z (level-9 LZMA2). For binary blobs the gap is smaller (3–8%). If the size delta matters, run the Compression Level Optimizer with the TAR.GZ output.
It opens as a .tar.gz — every modern unzipper (7-Zip, WinRAR, Keka, macOS Archive Utility, Linux tar) handles TAR.GZ natively. The downloaded filename ends in .tar.gz so your OS routes it to the right application.
Repackage any ZIP archive as TAR.GZ — the standard for Linux distributions, Docker layers, and CI pipelines. Powered by fflate, runs entirely in your browser.
Open toolPick a target format and convert any input archive to it. Handles ZIP ↔ TAR.GZ ↔ GZIP in any direction. Browser-native, zero upload, no command line.
Open toolDrop files and get a perfectly compressed ZIP with the optimal speed/size trade-off. Powered by fflate level 6 — the universal sweet spot. Zero upload.
Open tool