Open and explore 7Z (7-Zip) archive contents directly in your browser. View file lists, folder structure, and compression information without installing 7-Zip software. The 7Z format offers excellent compression ratios, making it popular for software distribution. For full browser support, consider our ZIP viewer.
or click to browse files
7Z uses LZMA/LZMA2 compression, often achieving 30-70% better compression than ZIP. View these highly compressed archives online.
The 7Z format is open source, developed by Igor Pavlov. Unlike RAR, there are no licensing restrictions on the format specification.
Browse the complete folder hierarchy and file list. See file names, sizes, and organization without full extraction.
Find specific files within large 7Z archives using the built-in search. Filter by filename to locate what you need quickly.
Works on any device with a web browser. View 7Z archives on Windows, Mac, Linux, Chromebook, tablets, or phones.
Files are processed locally in your browser. Your archives are never uploaded to external servers.
Drag and drop your 7Z file onto the upload area, or click to browse. We support 7Z archives with LZMA and LZMA2 compression.
Navigate the folder structure, search for files, and view archive information. See compression ratios and file details.
Check file sizes, compression info, and archive structure. Use this information to decide if you need full extraction with desktop software.
A 7Z file is an archive format created by 7-Zip, a free and open-source file archiver. It uses LZMA and LZMA2 compression algorithms, which typically achieve better compression ratios than ZIP or RAR. The format supports solid compression, AES-256 encryption, and Unicode file names.
Our online 7Z viewer lets you browse 7Z archive contents directly in your browser without installing 7-Zip or any other software. Simply upload your file and browse the contents. For full extraction, you may need the free 7-Zip software or convert to ZIP format.
7Z uses more advanced compression algorithms (LZMA/LZMA2) that analyze larger data blocks and find more patterns for compression. It also supports solid compression, where multiple files are compressed as a single stream, further improving ratios. 7Z files can be 30-70% smaller than equivalent ZIP files.
Yes! Unlike RAR, the 7Z format is completely open source. The 7-Zip software is free, and the format specification is publicly available. Anyone can create software that reads and writes 7Z files without licensing fees.
Yes! You can preview and download individual files directly from 7Z archives in your browser. Click on any file to preview its contents, then use the Download button to save it to your device. All extraction happens locally using WebAssembly technology.
Yes, your files remain private. Our 7Z viewer processes files locally in your browser. The archive data is used only for displaying the structure and is never uploaded to our servers.
The 7Z format was introduced by Igor Pavlov in 1999 as part of the 7-Zip archiver. It has become one of the most efficient archive formats available, particularly for compressing executables, libraries, and text-heavy content. The format's open-source nature has led to widespread adoption in software distribution, particularly for open-source projects.
7Z archives can use several compression methods, with LZMA (Lempel-Ziv-Markov chain Algorithm) being the default. LZMA2, an improved version, adds better multithreading support. The format also supports AES-256 encryption for secure archives, Unicode file names for international compatibility, and file spanning for splitting large archives.
7Z is ideal when maximum compression is the priority, such as for backing up large file collections, archiving software installations, or distributing files where download size matters. The format excels at compressing executables, source code, and text documents, often achieving dramatically smaller sizes than ZIP.
However, for sharing files with others, ZIP remains the safer choice due to its universal native support. 7Z requires recipients to have 7-Zip or compatible software installed. For web projects, consider using our image compression tools alongside archives to minimize total file sizes.