Repackage TAR Archive as 7Z
No compression by itself — tar only bundles files; compression requires piping through gzip, bzip2, or xz. Converting to 7Z gives you a key advantage: lzma2 compression achieves 30–70% better ratios than zip's deflate, especially on text and code archives. 7Z is best for achieving the highest compression ratios for archiving large collections of similar files.
Why Convert TAR to 7Z?
No compression by itself — tar only bundles files; compression requires piping through gzip, bzip2, or xz — converting to 7Z overcomes this by providing lzma2 compression achieves 30–70% better ratios than zip's deflate, especially on text and code archives
7Z is the right choice when you need to: archiving source code repositories and text-heavy datasets for maximum compression
Gain broader compatibility — 7Z works with 7-Zip (Windows), p7zip (Linux/macOS), PeaZip, WinRAR, The Unarchiver; no native OS support
Your TAR files were created for creating docker image layers and container filesystem snapshots, but now you need a format suited to different workflows
TAR vs 7Z — Format Comparison
Tape Archive (.tar)
7-Zip Archive (.7z)
How to Convert TAR to 7Z
Upload your TAR file
Drag your .tar file onto the upload area or click to browse. We accept TAR files up to 2 GB.
Choose 7Z as output format
Select .7z (7-Zip Archive) from the format list. 7Z uses lossless compression, so your output quality matches the source.
Convert and download
Click Convert and wait for processing. Your 7Z file will be ready to download in seconds. The result is optimized for achieving the highest compression ratios for archiving large collections of similar files.
Frequently Asked Questions
Is the TAR to 7Z conversion lossless?
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When both formats support lossless data, the conversion preserves all content. LZMA/LZMA2 compression with AES-256 encryption, solid archive mode, and header encryption.
How large will my 7Z file be compared to the original TAR?
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TAR files are typically 1 KB – unlimited (uncompressed), while 7Z files are typically 1 KB – unlimited. The actual size depends on content complexity and any quality settings you choose.
What software can open the converted 7Z file?
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7Z is compatible with: 7-Zip (Windows), p7zip (Linux/macOS), PeaZip, WinRAR, The Unarchiver; no native OS support.
What is the maximum file size I can convert?
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PureConverter accepts TAR files up to 2 GB. Your files are processed securely and deleted from our servers after conversion.
What's the difference between TAR and 7Z?
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TAR (Tape Archive) is best for bundling files and directories into a single archive while preserving unix file permissions and ownership. 7Z (7-Zip Archive) is best for achieving the highest compression ratios for archiving large collections of similar files. Key tradeoff: TAR's advantage is preserves unix file metadata (permissions, ownership, symlinks, timestamps) that zip silently strips, while 7Z's advantage is lzma2 compression achieves 30–70% better ratios than zip's deflate, especially on text and code archives.
Pro Tips for TAR to 7Z Conversion
7Z preserves full quality, so your output file will be as good as the TAR source — no need to worry about compression artifacts
Keep a backup of your original TAR file — while our conversion is reliable, having the source is always recommended
7Z works especially well for: creating encrypted backup archives with aes-256 and header encryption
Did you know? 7-Zip and the LZMA SDK are released under LGPL and public domain respectively — Igor Pavlov essentially gave away one of the world's best compression algorithms for free, which is why LZMA shows up in XZ, LZMA2, and even the Linux kernel.
Ready to Convert?
Upload your TAR file above and get your 7Z in seconds. Free, fast, and secure.