CONVERT LZ4 → GZ (LZ4 to GZ)
Fast, secure LZ4 to GZ conversion. No registration required.
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HOW TO CONVERT LZ4 → GZ
Provide the LZ4
Drag-and-drop the archive or pick it from your computer. We accept up to 25 MB on the free tier.
Stream-convert
The LZ4 is decompressed and re-compressed into GZ in a single pipeline stage — no temporary extracted folder.
Retrieve the output
Click to download the GZ. File structure, timestamps and permissions match the original exactly.
Opening note — LZ4 is a compression/archive format used to package or shrink files. The GZ you want is two clicks away. Our LZ4 to GZ converter is a bulk re-archiver. You upload an archive, we open it, stream every entry directly into a new archive of the target type and emit a GZ bit-identical to what running 7-Zip locally would produce. In practice LZ4 is a compression/archive format used to package or shrink files. On the other end, GZ is the gzip DEFLATE compression format, typically wrapped around TAR for Unix distributions.
Why convert LZ4 to GZ
A GZ often compresses the same content smaller than a LZ4 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.
LZ4 vs GZ — Technical specifications
Side-by-side comparison of the technical details.
LZ4
- MIME type
- application/x-lz4
- Extensions
- .lz4
- Algorithm
- LZ77 variant with fast byte-level parsing
- License
- BSD 2-Clause (library), GPL v2 (CLI)
- Typical integrations
- Linux kernel, ZFS, Kafka, RocksDB, Cassandra
- MIME Type
- application/x-lz4
- Extension
- .lz4
- Category
- Archives & Compressed
- Full Name
- LZ4 Compressed
- Conversion Engine
- ARCHIVE
GZ
- MIME type
- application/gzip
- Extensions
- .gz, .tgz (with tar)
- Algorithm
- DEFLATE (LZ77 + Huffman coding)
- MIME Type
- application/gzip
- Extension
- .gz
- Category
- Archives & Compressed
- Full Name
- Gzip Compressed
- Conversion Engine
- ARCHIVE
- Standard
- RFC 1952 (gzip), RFC 1951 (DEFLATE)
- Header
- 10 bytes: magic, method, flags, mtime, extra, filename, comment, crc, isize
| Specification | LZ4 | GZ |
|---|---|---|
| MIME type | application/x-lz4 | application/gzip |
| Extensions | .lz4 | .gz, .tgz (with tar) |
| Algorithm | LZ77 variant with fast byte-level parsing | DEFLATE (LZ77 + Huffman coding) |
| License | BSD 2-Clause (library), GPL v2 (CLI) | — |
| Typical integrations | Linux kernel, ZFS, Kafka, RocksDB, Cassandra | — |
| MIME Type | application/x-lz4 | application/gzip |
| Extension | .lz4 | .gz |
| Category | Archives & Compressed | Archives & Compressed |
| Full Name | LZ4 Compressed | Gzip Compressed |
| Conversion Engine | ARCHIVE | ARCHIVE |
| Standard | — | RFC 1952 (gzip), RFC 1951 (DEFLATE) |
| Header | — | 10 bytes: magic, method, flags, mtime, extra, filename, comment, crc, isize |
LZ4 vs GZ — Strengths and limitations
What each format does best, and where it falls short.
LZ4 Strengths
- Decompression speed — approaches memcpy throughput.
- Very fast compression — can keep up with SSD write speeds.
- Stable format — reference implementation unchanged for years.
- Widely deployed in databases, filesystems, and kernels.
- BSD-licensed library.
Limitations
- Compression ratio lags gzip by 20-30%.
- Not designed for long-term archival where ratio matters.
- Older than zstd, which beats LZ4 at comparable speed at slightly better ratio.
GZ Strengths
- Patent-free, royalty-free — that was the whole point in 1992.
- Universally supported on every OS.
- Fast compression and extremely fast decompression.
- Preserves original timestamps and filenames in the header.
- Streamable — can compress/decompress over pipes.
Limitations
- Compresses one file at a time — needs tar for multi-file archives.
- Older algorithm — Zstandard, xz, and brotli all beat it on ratio.
- Single-threaded in the reference implementation (pigz fixes this).
Quality & Compatibility
Compressed size can go up or down between LZ4 and GZ 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 LZ4 is password-protected, we will ask for the password during upload; the resulting GZ is emitted with encryption too if the format supports it.
- When the GZ has to fit a strict upload cap, split into multi-volume archives in Advanced — several smaller GZ parts are often accepted where a single large one is rejected.
- For distribution bundles, include a short README at the root of the GZ so recipients know what the archive contains without extracting it.
Frequently Asked Questions
Yes. The free tier accepts files up to 25 MB without registration, email capture or watermarks; paid plans go up to 2 GB. 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 LZ4 and GZ use different compression codecs, every entry is decompressed from the LZ4 and re-compressed for the GZ. 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 LZ4 and the GZ 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 LZ4 used an older codec like Deflate. Against modern LZMA2 / Zstd GZ 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 GZ can be re-encrypted with a password of your choice (AES where the target format supports it).
LZ4 Compressed
Source formatLZ4 is an extremely fast lossless compression algorithm focused on speed over compression ratio. It can compress at over 500 MB/s per core and decompress at multiple GB/s, making it the standard choice for real-time and in-memory compression.
Gzip Compressed
Target formatGzip is a single-file compression format based on the DEFLATE algorithm. It is most commonly paired with TAR to create .tar.gz archives and is the standard compression for web content delivery.
Going the other way? Convert GZ back to LZ4 with the same engine.
Common Use Cases
Share across platforms
Send GZ files to anyone without worrying about whether they have the right software for LZ4.
Embed in documents
Drop GZ output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
GZ often produces smaller files than LZ4 for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
LZ4 vs GZ — Typical file sizes
Approximate file sizes for common scenarios.
- Text file 40-60% of original
- Already-compressed data (JPEG, MP4) 99%+ (no gain)
- Database page (typical) 55-70% of original
- Plain text file 25-40% of original
- HTML page 20-30% of original
- Source code archive 15-30% of original
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Related comparisons
See these formats side by side to understand which fits your use case best.
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Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 60 minutes. We never read, share, or store your data.