7Z Extractor
Extract 7Z archives in your browser — open high-compression 7-Zip files without installing 7-Zip.
🔒 Processed locally; encrypted 7Z will be reported clearly.
💾 Solid 7Z may use more memory.
Why .7z compresses harder — and what that costs
No 7-Zip install needed
Open 7Z on any device, including Mac and Linux where 7-Zip is not native.
High-ratio archives
Handles LZMA/LZMA2 solid archives that other online tools often fail on.
Private
Extraction runs locally via WebAssembly; nothing is uploaded.
How it works
- 1
Drop your .7z file.
- 2
Wait for the file list (solid archives may take a moment).
- 3
Browse and download files individually.
- 4
Or download all as ZIP.
LZMA/LZMA2 and solid archives
- 7z defaults to LZMA/LZMA2 with dictionary windows far larger than ZIP deflates — better ratios, more memory while extracting.
- Solid mode packs similar files as one stream: great ratio, but pulling one file may require decoding everything before it.
- Encrypted .7z uses AES-256; this tool handles plain archives only.
Frequently asked questions
What is 7Z?⌄
7Z is 7-Zip’s format, using LZMA for very high compression, common for backups and software.
Why not install 7-Zip?⌄
This tool works without installing anything, on any OS and in the browser.
Are encrypted 7Z files supported?⌄
No, encrypted 7Z will show a clear “not supported” message.
Why do some file names look wrong?⌄
Non-Latin names may display as placeholders due to the WASM engine, but contents are correct.
Is there a size limit?⌄
Same 10GB business line; practical browser limit about 1.5GB desktop / 512MB phone.
Can I create 7Z?⌄
No, this tool extracts only; use desktop 7-Zip to create.
Related tools
What Is a 7Z File?
7Z is the archive format of 7-Zip, the open-source archiver for Windows. It is known for the highest compression ratio among common formats, thanks to LZMA and LZMA2, and is popular for backups, software distribution and game assets.
Why 7Z compresses so well
7Z can use a solid block that compresses many files together and supports large dictionaries, which is why a 7Z of many small text files can be dramatically smaller than ZIP.
Honest limits
This browser tool extracts via libarchive-wasm. Encrypted 7Z files are not supported and will show a clear error; file names with non-Latin characters may display as placeholders, but the file contents are intact.
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