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TAR to 7Z Converter

Convert TAR to 7Z online for free. Fast, secure archive conversion that preserves folder structure and file integrity. No software installation required.

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Max file size 50MB. Sign up for more.

TAR vs 7Z: Side-by-side

Technical comparison of the two formats — useful for deciding which to use, or for confirming what changes during conversion.

Property TAR 7Z
Full name Tape Archive 7-Zip Archive
Year introduced 1979 1999
Developer / standard body AT&T Unix Igor Pavlov
MIME type application/x-tar application/x-7z-compressed
File extension .tar .7z
Compression None (often paired with gzip → .tar.gz) LZMA / LZMA2 (best ratio of common formats)
Color / data depth N/A N/A
Max dimensions / size 8 EB file size 16 EB file size
Transparency No No
Animation No No
Standard / specification POSIX / IEEE 1003.1 7-Zip (open)
Best for Unix / Linux backups, source-code distribution Maximum compression — typically 30–50% smaller than ZIP

TAR to 7Z FAQ

Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert TAR files to 7Z.

How do I convert TAR to 7Z without extracting files manually?
Upload your TAR file to iFormat and click Convert. Every file and folder inside is extracted and re-packaged as 7Z with the folder structure intact — no need to extract, reorganise, and re-compress yourself. It's free and needs no account.

Does converting TAR to 7Z keep my folder structure?
Yes. All files, nested folders, and the hierarchy inside your TAR archive are preserved when they're re-compressed into 7Z, so the contents open exactly as they were organised.

Why convert TAR to 7Z?
TAR is a Unix archive container good for Linux and server backups. 7Z is a high-ratio LZMA2 archive best for maximum compression. Convert when the recipient's software opens 7Z more easily, or when you need its compression or compatibility.

Are the files inside the archive changed during conversion?
No — the individual files are only re-compressed, not modified. A document, photo, or spreadsheet inside your TAR archive is byte-for-byte identical after it's re-packaged as 7Z.

Can I convert TAR to 7Z on Mac, Windows, or Linux?
Yes. iFormat works in any modern browser on any operating system — no need to install WinRAR, 7-Zip, or any other desktop tool. Upload the TAR archive, convert to 7Z, and download.

What is TAR?
TAR is a Unix archive container, typically used for Linux and server backups. Converting it to 7Z makes the file easier to open, share, or upload where TAR is not supported.

Why convert TAR to 7Z?
For maximum compression. TAR itself doesn't compress (it's just a bundle); 7Z applies LZMA2 compression which is significantly more efficient than gzip or bzip2 commonly paired with TAR.
Need the reverse conversion?
Convert 7Z back to TAR with our companion tool.
7Z to TAR converter

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