LZMA to TXZ Converter
FileFlip converts LZMA to TXZ entirely inside your browser, using libarchive compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert an LZMA file to TXZ?#
- Drop your LZMA file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to TXZ and the conversion starts on its own. FileFlip downloads 1.0 MB of WebAssembly the first time and nothing after that, then runs libarchive on your own machine.
- Save the TXZ file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting LZMA to TXZ lose quality?#
No. Converting LZMA to TXZ does not touch the files inside the archive. Each member is read out and written back byte for byte, so only the wrapper around them changes and nothing is recompressed.
Is it safe to convert LZMA files online?#
Yes, because nothing is uploaded. FileFlip converts LZMA files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What LZMA to TXZ actually does to the file#
Converting LZMA to TXZ runs on libarchive, downloads 1.0 MB of WebAssembly the first time and nothing after that, copies the archived files through unchanged, keeps file contents.
| Engine | libarchive |
|---|---|
| Conversion path | 2 steps: LZMA → the unpacked files → TXZ |
| Downloaded to your browser | 1.0 MB, once, then cached by your browser |
| Quality | Lossless, contents copied unchanged |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
What survives the conversion
| What is in the file | This conversion | Why |
|---|---|---|
| File contents | Kept | Carried through into the converted file. |
| File timestamps | Sometimes | Survives for some files and not others. |
| File permissions | Sometimes | Survives for some files and not others. |
Worth knowing before you start:
- the output is a PAX tar archive inside the compressor, not a single compressed stream
- every entry is extracted into memory before anything is written, so a very large archive can exhaust it
What is an LZMA file?#
An LZMA file is a single stream of data compressed with the raw LZMA algorithm inside its original, minimal container, the format that came before both the 7z and xz formats now built on the same compressor.
An LZMA file mostly turns up when opening something old rather than something worth creating new; xz supersedes it for anything being compressed today.
Convert an LZMA file to xz when it needs an integrity check or has to be re-shared, since xz is the actively maintained format built on the same compressor.
What is a TXZ file?#
A TXZ file is a TAR archive compressed as one xz stream under a single extension, combining tar's metadata-preserving bundling with the strongest general-purpose compression ratio of the tar pairings offered here.
Use TXZ for a source release or package where the smallest possible download size is worth slower compression.
Convert TXZ to TGZ when a tool in the chain only understands gzip, still the most universally supported tar compressor.
LZMA to TXZ questions people ask#
What's the difference between LZMA and XZ files?
An LZMA file uses the original .lzma container: just a properties byte and dictionary size in front of the compressed stream, with no integrity check. XZ wraps the same LZMA2 compression in a newer container that adds checksums and multi-stream support, which is why xz replaced .lzma as the default years ago.
Is LZMA the same compression as 7z uses?
Yes, the LZMA algorithm inside a standalone .lzma file is the same compressor 7-Zip built its 7z format around, and the two share the same decoder. The difference is the container: .lzma is a minimal raw wrapper, while .7z is a full archive format that can hold multiple compressed files with checksums and encryption.
How do I open an LZMA file?
7-Zip on Windows and its Linux and macOS port, p7zip, both extract .lzma files directly. On Linux, the xz-utils package also installs an unlzma command specifically for this legacy format.
What's the difference between .tar.xz and .txz?
Nothing; TXZ is a tar archive compressed with xz, the same content as a file named .tar.xz, just written with one extension instead of two.