Compress 7Z
Compress files to 7Z format with high compression ratio.
or drop files here
Maximum file size: 500MB total
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Learn more about this tool
About 7Z Compression
7Z is a modern archive format developed by 7-Zip, supporting LZMA and LZMA2 compression algorithms for excellent compression ratios. It supports AES-256 encryption, multi-volume archives, and solid compression. Our tool uses WebAssembly for efficient browser-based compression. Whether you are optimizing for the NBN, preparing myGov submissions, or sharing files across Australia's vast distances, this tool keeps your files light and quick to transfer — even on regional, fixed-wireless, and satellite connections, with no upload required.
Frequently Asked Questions
What is 7Z format?
7Z is an open archive format with support for LZMA/LZMA2 compression, offering some of the best compression ratios. It supports encryption, solid compression, and multiple files.
7Z vs ZIP — which is better?
7Z typically achieves 30-70% better compression than ZIP. ZIP has universal compatibility, while 7Z is better for maximum compression.
How much compression can I expect?
Text and document files can compress by 60-90%. Mixed content archives typically see 40-60% reduction.
Is this 7Z compressor free?
Yes, completely free with no limits. Compress as many files as you need.