Compress 7Z
Compress files to 7Z format with high compression ratio.
or drop files here
Maximum file size: 500MB total
Related Tools
Compress BZ2
Compress files to BZ2 format in your browser. High compression ratio with WebAssembly-powered processing.
Compress XZ
Compress files to XZ format in your browser. High compression ratio with LZMA2 algorithm via WebAssembly.
Compress GZIP
Compress files to GZIP format in your browser. Fast, lightweight compression for single files.
Decompress XZ
Decompress XZ files in your browser. Extract .xz files instantly with WebAssembly-powered processing.
Decompress BZ2
Decompress BZ2 files in your browser. Extract .bz2 files instantly with WebAssembly-powered processing.
Decompress 7Z
Extract and decompress 7Z archives in your browser. View and download individual files with WebAssembly.
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 assets for a US-hosted site on AWS, Cloudflare, or Vercel, trimming email attachments for Gmail and Outlook, or submitting documents to federal portals, this tool keeps your files lean and your workflow fast — all without uploading anything to a server.
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.
References & Resources
Authoritative specifications and references for the file formats this tool works with.