Compress 7Z
Compress files to 7Z format with high compression ratio.
or drop files here
Maximum file size: 500MB total
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.For an attachment, check the recipient’s stated limit and compare the downloaded file in bytes. MB and MiB differ: 1 MB = 1,000,000 bytes; 1 MiB = 1,048,576 bytes. A selected target is a request, not a guarantee.
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.
Create a ZIP archive
Bundle files without changing their contents. JPEG, MP4 and other compressed files may shrink very little in a ZIP.
There is no guaranteed saving or exact target for every file. If the result is larger, some tools return the original; compare its format and size before sharing. For an attachment, check the recipient’s stated limit and compare the downloaded file in bytes. MB and MiB differ: 1 MB = 1,000,000 bytes; 1 MiB = 1,048,576 bytes. A selected target is a request, not a guarantee.
References & Resources
Authoritative specifications and references for the file formats this tool works with.
Compress and extract archives. Support ZIP, RAR, 7Z, TAR and more formats.