CONVERT
TAR → LZMA
Fast, secure TAR to LZMA conversion. No registration required.
DRAG. DROP. DONE.
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Max 100 MB · Free plan · No signup required
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Starting point: TAR is the Unix tape archive — a concatenation of files without compression. Natural next step, a LZMA. TAR to LZMA conversion is the fastest path when the platform or tool you are shipping to does not speak TAR. Instead of asking every recipient to install a decoder, produce a LZMA once and hand them something their OS opens natively. Context: TAR is the Unix tape archive — a concatenation of files without compression. LZMA is an archive format that bundles multiple files into a single compressed container.
TAR Archive
Source formatTAR is a Unix archive format that bundles files together without compression. It is commonly combined with gzip or bzip2 for compressed archives and is the standard for Linux software distribution.
LZMA Compressed
Target formatLZMA (Lempel-Ziv-Markov chain Algorithm) is a high-ratio compression algorithm developed by Igor Pavlov for the 7-Zip archiver. It achieves significantly better compression than gzip or bzip2, especially on text and binary data, at the cost of higher memory usage.
Why convert TAR to LZMA
A LZMA often compresses the same content smaller than a TAR at the same strength setting, thanks to more modern codecs. For distribution over bandwidth-limited channels — email, chat apps, CDN delivery — the size difference matters.
HOW TO CONVERT
TAR → LZMA
Provide the TAR
Drag-and-drop the archive or pick it from your computer. We accept up to 100 MB on the free tier.
Stream-convert
The TAR is decompressed and re-compressed into LZMA in a single pipeline stage — no temporary extracted folder.
Retrieve the output
Click to download the LZMA. File structure, timestamps and permissions match the original exactly.
Common Use Cases
Legacy format rescue
Re-archive decades-old TAR collections into LZMA before the TAR tooling disappears from modern package managers.
Cloud storage optimisation
LZMA tends to compress better than TAR on text-heavy payloads — fewer bytes stored means lower monthly costs.
CI/CD artefact pipelines
Build agents publish artefacts as LZMA when downstream jobs consume LZMA natively; avoid an extra extract-and-rezip step.
Mobile sharing
Phone archive apps handle LZMA out of the box but may prompt the user to install extra software for TAR.
TAR vs LZMA — Strengths and limitations
What each format does best, and where it falls short.
TAR Strengths
- Streamable — you can tar files straight to a network pipe, no seek needed.
- Preserves Unix permissions, ownership, symbolic links, and timestamps.
- Universally supported on Unix-like systems.
- Simple format — the GNU tar source has been stable for decades.
- No compression overhead — pair with gzip/xz/zstd as needed.
Limitations
- No built-in compression — plain .tar files are the same size as their contents.
- No random access — reading one file requires scanning from the start.
- Windows tooling is second-class — PowerShell only added native tar in 2018.
LZMA Strengths
- Highest-ratio mainstream compression (beats gzip by 30%).
- Public domain SDK — royalty-free.
- Mature since 1998 with no breaking changes.
- Core of 7z, xz, .tar.xz workflows.
- Multi-threaded LZMA2 scales across CPU cores.
Limitations
- Slow compression at highest settings.
- Memory-hungry — 1 GB+ for extreme compression levels.
- Zstandard matches its ratios at less memory cost.
TAR vs LZMA — Technical specifications
Side-by-side comparison of the technical details.
| Specification | TAR | LZMA |
|---|---|---|
| MIME type | application/x-tar | application/x-lzma |
| Extension | .tar | — |
| Block size | 512 bytes (traditional) | — |
| Header variants | v7, ustar, POSIX.1-2001 (pax), GNU | — |
| Max filename length | 100 bytes (v7); unlimited (pax extended headers) | — |
| Extensions | — | .lzma, .lz |
| Algorithm | — | Lempel-Ziv-Markov chain + range coding |
| Public domain SDK | — | Yes (since 2001) |
| Variants | — | LZMA (original), LZMA2 (multi-threaded, used in xz) |
TAR vs LZMA — Typical file sizes
Approximate file sizes for common scenarios.
TAR
- 1 MB of source files (uncompressed .tar) ~1 MB
- Same files as .tar.gz 150-400 KB
- Linux kernel source (.tar.xz) ~120 MB
LZMA
- Text/source archive 15-25% of original
- Linux kernel source (.tar.xz = LZMA2) ~125 MB
- Windows system backup (.lzma) 25-40% of original
Quality & Compatibility
Compressed size can go up or down between TAR and LZMA depending on the codec and the level — modern LZMA2/Zstd usually beats older Deflate on text, while already-compressed content (images, video) changes little. We default to a balanced level; Advanced options expose the full range.
Tips for Best Results
- If the TAR is password-protected, we will ask for the password during upload; the resulting LZMA is emitted with encryption too if the format supports it.
- When the LZMA has to fit a strict upload cap, split into multi-volume archives in Advanced — several smaller LZMA parts are often accepted where a single large one is rejected.
- For distribution bundles, include a short README at the root of the LZMA so recipients know what the archive contains without extracting it.
Frequently Asked Questions
Frequently Asked Questions
Yes. The free tier accepts files up to 100 MB without registration, email capture or watermarks. Paid plans raise the size cap, enable batch conversions and provide a REST API for automation, but nothing on the free tier is quality-limited — the output is exactly the same as on any paid plan.
Yes — because TAR and LZMA use different compression codecs, every entry is decompressed from the TAR and re-compressed for the LZMA. The uncompressed data is identical on both sides, and the re-compression happens entirely inside our processing container.
Uploads run over HTTPS, files are processed in isolated containers, and both the source TAR and the LZMA output are auto-deleted within two hours. No account is required, file contents are never logged, and KaijuConverter does not use uploads for AI training. The paid plan adds a signable data-processing agreement for regulated workflows.
Usually yes, modestly, when the original TAR used an older codec like Deflate. Against modern LZMA2 / Zstd LZMA containers expect 10-30% savings on mixed content and almost no change on pre-compressed payloads. Advanced → compression level lets you trade speed for ratio.
Most files finish in well under a minute. Small images and documents are typically ready in a few seconds; large video or audio files scale roughly with duration. Upload speed from your network is usually the dominant factor, not server time.
Yes. Provide the password during upload; we use it only to decrypt inside the processing container and never log or persist it. The resulting LZMA can be re-encrypted with a password of your choice (AES where the target format supports it).
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Read guideSecure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 60 minutes. We never read, share, or store your data.