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.Before emailing a PDF, open the downloaded copy and check fine text at the intended viewing size. The tool can reduce image detail; its target size is not guaranteed. If forms, signatures or searchable text matter, keep the original PDF.
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. Before emailing a PDF, open the downloaded copy and check fine text at the intended viewing size. The tool can reduce image detail; its target size is not guaranteed. If forms, signatures or searchable text matter, keep the original PDF.
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.