B5T File

What are B5T files and how to open them

Are you having problems opening a B5T file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your B5T files.

What is a B5T file?

A .B5T file is a BlindWrite TOC file.

BlindWrite TOC or BlindWrite 5 Disc Track Information format is metadata produced by BlindWrite version 5 from VSO Software. It holds a small descriptor file that records the layout of tracks on an optical disc - track order, start and end points - so that BlindWrite can rebuild or burn an accurate copy of the original disc without carrying the full disc data. It usually accompanies a larger file which carries the actual disc image.

The creator program for this format is BlindWrite version 5 by VSO Software. When a disc is copied using that program, it writes two files: one for the image data and one for the TOC metadata. Other tools that work with blind-image archives or disc images may read the TOC file to display disc structure or help mount or burn the combined data correctly.

Files of this format begin with a three-byte ASCII identifier BWT at offset zero, followed by the ASCII string STREAMSIGN at offset 4, which helps detect that the file is a BlindWrite control or track-information file.

How to open B5T files

Important: Different programs may use files with the B5T file extension for different purposes, so unless you are sure which format your B5T file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested ten different B5T openers which you will find listed below.

Last updated: August 23, 2026

Various apps that use files with this extension

These apps are known to open certain types of B5T files. Remember, different programs may use B5T files for different purposes, so you may need to try out a few of them to be able to open your specific file.

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