Opening BLS Files

The BLS file type is primarily associated with Standard Jet DB.

BLS	File extension: BLS
	File type:	structured log file

What is a BLS file?

BLS files mostly belong to Standard Jet DB. There are two main variants of BLS files. One variant uses the JetDB format and stores log data generated by JetBrains applications. These log files record system events and debugging details and are meant to be processed using specialized tools such as Standard Jet DB.
The second variant is based on XML. It is used for Bluetooth qualification projects to record test cases and technical data. This type is common among projects associated with Bluetooth SIG, and it is supported by applications like Bluetooth Launch Studio.
Key Points provided by FilExt.com:

Uses a proprietary JetDB structure for logging in JetBrains products.

Uses standard XML for Bluetooth test case data.

Each variant requires the right tool: the JetDB variant works best with a dedicated log viewer and the XML variant can be viewed in any XML-capable editor.

For further technical details, visit the avtims webpage or the Bluetooth core specification.

FilExt.com note: Both file types share the same BLS extension but serve distinct functions based on their internal format.

How to open a BLS file

You need a suitable software like Standard Jet DB to open a BLS file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your BLS file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a BLS file directly in the browser:. Just drag the file onto this browser window and drop it.

Online BLS Text Viewer

Choose your .bls file to analyze

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Online File Viewer

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BLS format details:

If you know the file format, you can also find out how to open or edit the file. Each file format has a unique extension and almost always a unique signature. For example, Microsoft Word documents have the extension .docx and the signature (usually the first 3 characters in this file) PK. Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. If there are problems opening a file, you must first determine the file format used. Below you will find our evaluation of the BLS files:

The BLS file extension is rarely used and covers a large number of different file formats. The following file formats are most commonly found in BLS files:

• 15% of all BLS files are based on the popular JetDB file format. The JetDB is a database format often used by Microsoft Access and Visual Basic programs. JET is short for Joint Engine Technology. They consist of unreadable binary data. The files are 1 MB to 30 MB in size, with a median of 4 MB. The files contain the following words: Standard Jet DB. The following filename is common: 2020-06-01.bls.
• 8% of all BLS files use the popular JSON file format. JSON (JavaScript Object Notation) is a lightweight data−interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. If you open these files in a text editor, you can view and read the content yourself. BLS files are between 2 KB and 3 KB in size. The files contain the following words: ApplicantSerialNo, FirstName, LastName, PlaceOfBirth, ServerDateOfBirth, SurName, SurnameAtBirth and CountryOfBirthId.

All other BLS files (77%) have no consistent format, often e.g. XML, bhY, This and HSXG. These files are often connected to card, play, project, fukouna, shoujo or data. Drag & drop your file here to see the file format and a preview of your BLS file!