Convert 7Z to TAR Online Free

Convert 7Z to TAR online for free in your browser. Seamlessly transition from compressed archives to a widely supported Unix format.

Convert 7Z to TAR Online Free

Transform 7-Zip archives into standard TAR format

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This page converts your 7Z to TAR files using secure server-assisted processing. Files are uploaded over an encrypted connection, converted on our servers, and are not stored or retained after your download completes, and no sign-up is required. Drop your 7Z files below and the TAR output is ready to download in seconds. 7Z and TAR have different characteristics: depending on whether you're going from a more-compressed format to a less-compressed one or vice versa, the resulting file size and quality will differ accordingly. The exact tradeoffs are explained in the comparison section further down the page.

Drop your 7Z or TAR files here

or click to browse files

Practical limits vary by file and workload
BZ2GZRARTARZIP

How the Two Formats Compare

Converting from 7Z to TAR allows you to move from a highly compressed archive format to a simple and widely supported Unix archiving standard. TAR is commonly used in Linux environments, server deployments, and software packaging workflows.

7Z 7-Zip Archive Format

7Z is the native archive format of 7-Zip, an open container that can hold many files and directories under a single header. Its defining trait is that the container and the compression method are separate concerns: a 7z file can carry LZMA2, LZMA, bzip2, or PPMd data, and LZMA2 is what it reaches for by default.

LZMA2 works from an LZ-style sliding dictionary backed by a range coder, and that dictionary can be made very large. Feeding the matcher a bigger window is precisely why 7z tends to beat DEFLATE-based formats on sizeable inputs: repeated material far apart in the input still gets matched and collapsed.

The cost is time and memory. A large dictionary has to be held in RAM while compressing and decompressing, so 7z favours situations where the archive is written once and read occasionally, such as distributing a build or shrinking an archive for long-term storage.[1][2][3]

TAR TAR Archive Format

TAR is an archival format, not a compressor. Dating to 1979, its job is to fold many files and directories into one stream while keeping the file system detail intact, and it performs no size reduction whatsoever.

The layout is deliberately plain: the archive is a run of 512-byte blocks, where each member gets a header block naming it and recording mode, owner and group ids, size, modification time, and a checksum, followed by its content blocks. Two zero-filled blocks mark the end.

What tar preserves is the reason it survives. Permissions, ownership, timestamps, symlinks, and directory structure all round-trip, which is why the Unix convention is to tar first and compress second, producing .tar.gz or .tar.bz2 and keeping the two concerns separate.[1][2][3]

Key Reasons to Convert 7Z to TAR

Unix Compatibility

Fidelity is the motive. TAR performs no compression at all; it preserves names, permissions, ownership, and timestamps exactly. Converting from 7Z gives you a faithful archival copy that Unix tooling treats as native.

Preserve File Metadata

Ratio and speed pull in opposite directions, and the two formats sit at different points on that line. 7Z and TAR make different bets about how much CPU time and memory a smaller file is worth, so the right choice depends on whether the archive is written once and read often, or the reverse.

Prepare for Compression

Tooling decides more than theory does. Whatever is going to consume this archive, a build system, a package manager, a colleague on an unfamiliar machine, has formats it handles first and formats it handles reluctantly. TAR is the choice that keeps you on the well-supported path here.

System-Level Usage

Storage policy is the last consideration. Archives that will sit untouched for years should favour the format your future tooling is most likely to still read, and that calculation often favours TAR over holding on to 7Z.

When to Use Which

Common 7Z Use Cases

Software distribution where file size is critical, backup archives requiring maximum compression, large document collections, and developer projects with repetitive code structures.

Long-term storage of large datasets, creating portable software packages, compressing game assets, and distributing multi-file projects with maximum space efficiency.

Common TAR Use Cases

Packaging files for Linux systems, preparing archives for compression, and distributing source code.

System backups, server migrations, and archiving files with preserved metadata.

7Z Limitations

Requires third-party software (7-Zip or compatible tools) to extract, not natively supported in all operating systems. Solid compression can make individual file extraction slower.

High compression settings require significant CPU and memory resources. Maximum compression can take much longer than standard formats like ZIP.

7Z vs TAR Comparison

Feature7ZTAR
CompressionLZMA/LZMA2 (excellent)None
File SizeVery smallLarger
SpeedSlowerVery fast
CompatibilityRequires 7-ZipBuilt into Unix/Linux
Use CaseMaximum compressionSystem archiving

Key Capabilities

7Z Key Features

  • LZMA/LZMA2 compression - up to 40% better than ZIP
  • Solid compression for related files
  • AES-256 encryption with password protection
  • Open-source and free from patents
  • Multi-volume splitting and self-extraction

TAR Key Features

  • Preserves file permissions and structure
  • Standard format on Unix and Linux systems
  • No built-in compression
  • Ideal for further compression
  • Simple and reliable format

Practical Advice

Check File Structure

Verify the converted TAR before you delete anything. List its contents and confirm the file count matches what went in. A silent truncation is far easier to catch at this moment than months later when the source is long gone.

Consider Compression Needs

Keep the original 7Z until the TAR has proven itself. Conversion produces a new artefact, and the source archive is your only way back if a member did not survive the trip intact.

Test on Target System

Match the format to the lifetime of the data. Short-lived transfers reward speed, long-lived archives reward a format that is openly specified and widely implemented, because that is what determines whether it still opens in ten years.

7Z to TAR Conversion Data

Converting high-compression LZMA2 archive (7Z) to tape archive without compression (TAR) involves a specific tradeoff. TAR typically produces a slightly larger archive than 7Z.

Typical File Size
TAR typically produces a slightly larger archive than 7Z
Quality Outcome
Lossless conversion (perfect quality preservation)
Typical Conversion Speed
Depends on archive size and compression level

Useful when applications or workflows require the TAR format specifically.

How to Convert 7Z to TAR

  1. Upload Your 7Z File

    Add your 7Z file by dropping it on the upload area or clicking to browse. It travels over an encrypted connection, so the archive is protected while it moves to the converter.

  2. Select TAR Format

    Conversion begins as soon as the upload lands. The 7Z data is unpacked, its contents are re-encoded into the TAR structure, and the result is written out. Large archives and archives holding many small files take proportionally longer.

  3. Download Converted TAR

    Download the finished TAR when it is ready. Open it once to confirm the contents look right, and keep it with no account or sign-up needed.

Sources and References

Format details on this page are based on the official specifications and documentation below.

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