Open LZMA files in your browser
A bare LZMA stream, from 7-Zip's LZMA SDK and the old LZMA Utils, since replaced by XZ. Open a .lzma or .tar.lzma right here. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your archive opens like a folder, its files listed on the left.
- Listed like a folder • Unpacks only what you pick
- Locked archives • Hidden file names included
- Search • Find any file by its name
- Export • Save as ZIP or Extract all
About LZMA
Igor Pavlov designed the .lzma format for the LZMA SDK, the compression library behind 7-Zip. It's also called LZMA_Alone, since it holds a bare LZMA stream with no archive around it.
A .lzma file is a 13 byte header followed by the compressed data, with no checksum. LZMA Utils brought it to Linux, often around a TAR as .tar.lzma, until the XZ format replaced it.
No browser opens LZMA by itself. Filepeek unpacks it with 7-Zip compiled to WebAssembly: a .tar.lzma opens straight to the files of the TAR, and a lone .lzma holding one file opens it right away.
LZMA compressed file
.lzma
Format
- MIME type
- application/x-lzma
- Made by
- Igor Pavlov
Inside the file
- Compression
- LZMA
- Holds
- One file, often a TAR
- Header
- 13 bytes, with no checksum
- Replaced by
- XZ
Opens in every browser
No browser opens a .lzma file by itself. Filepeek unpacks it with 7-Zip in Chrome, Edge, Firefox and Safari.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Questions
How do I open a .lzma file?
Drop it on this page or choose Peek an LZMA. A .tar.lzma lists its files like a folder, and a lone .lzma opens the file inside right away, with no command line.
What's the difference between LZMA and XZ?
XZ is the newer format, made to replace .lzma. It compresses with LZMA2 and adds a proper header and checks against damage, while .lzma is a bare stream.
Is it the same as a 7z?
No. A 7z is a full archive, with a list of files and passwords. A .lzma holds one stream of data, often a TAR.
Can I turn it into a ZIP?
Yes. Choose Export, then Save as ZIP. Phones and computers open the ZIP without an app.
Is my file uploaded?
No. It's unpacked inside your browser and never leaves your device.