BLZ Converter

Convert BLZ files online for free

Select File
Drop or upload your .BLZ file

Online File Converter

✈

How to convert your BLZ file

Click the "Select File" button above, and choose your BLZ file.
You'll see a preview.
Click the "Convert file to..." button to save your file in the format you want.

Convert BLZ to another file type

The converter easily converts your BLZ file to various formats - free and online. No Steam or extra software needed.

Convert a file to BLZ

The converter also works in reverse, so you can convert other Compressed formats to BLZ with high quality output.

About BLZ files

The .BLZ extension is a shared container format primarily associated with Blizzard Entertainment games and TeamViewer collaboration software, creating distinct challenges depending on the source.

1. Blizzard Crash Reports (Most Common):
When games like World of Warcraft, Overwatch, or Diablo experience a critical error, they generate a .BLZ file in the Errors directory. Technically, this is just a standard GZIP archive disguised with a proprietary extension. The frustration for users is that Windows does not recognize the extension, preventing you from inspecting the contained error.log or memory dumps to diagnose the crash. To access the data, you generally need to rename the file or force-open it with an archive utility.

2. TeamViewer Meeting Recordings:
Previously known as "Blizz," the TeamViewer Meeting software saves session recordings as .BLZ files. These are proprietary video containers that cannot be played in standard media players like VLC or Windows Media Player. They are locked to the TeamViewer ecosystem unless converted using the host software.

3. Legacy Mobile Installers:
In the retro gaming scene, .BLZ files are compressed game installers for the Nokia N-Gage. These require a specific "BLZ Installer" app to run on the device to unpack game data to the generic system memory.

Best Conversion Targets:

For Debugging (Blizzard): Treat the file as a GZ archive. Extract the contents to view as TXT or LOG files to read stack traces and error codes.
For Video Playback (TeamViewer): Open the file in TeamViewer Meeting and use the built-in export function to convert the recording to MP4 or AVI for sharing.
For Archiving: Repackage extracted logs into a standard ZIP file for easier email attachment support.

Use Convert.Guru to open and convert your BLZ file.

Users also converted DLZ, ARA and PDAT files.

FAQ

If you want to convert BLZ file to EXE, ISO, BIN, CUE, PAK, WAD, PK3, PK4, BSP, MAP, SAV or DAT, you can use 7-Zip or similar software from the "Compressed Error Log Archive" category. In the File menu, look for Save As… or Export….

To convert MOD, BIN, CFG, SCX, DAT, MPQ, LOG, CUE, INI, EXE, SCM or ISO files to BLZ, try 7-Zip or another comparable tool in the "Compressed Error Log Archive" category.

The BLZ Converter Story

The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our BLZ converter.