Convert Excel binary workbooks (XLSB) online for free
The converter easily converts your XLSB workbooks to various formats - free and online. No Microsoft Excel or or other Spreadsheet software needed.
To convert other file formats to the "Binary Workbook File" file type, you need software like Microsoft Excel or a similar tool.
The .XLSB file is an Excel Binary Workbook created by Microsoft Excel. Unlike the standard XLSX format, which uses XML-based text to store data, .XLSB files store spreadsheet data in a binary format inside a ZIP container. This binary structure makes saving, calculating, and opening massive spreadsheets significantly faster. Financial analysts and data scientists often use .XLSB when dealing with files exceeding 50MB or containing millions of rows, as it drastically reduces file size and improves performance.
However, the .XLSB format has major disadvantages. Because it is a compiled binary format, it is not human-readable and cannot be easily parsed by third-party data extraction tools, web browsers, or older databases. It also supports embedded macros (VBA) by default, which makes it a potential security risk since malicious code can be hidden inside. Additionally, many mobile viewer apps and alternative office suites struggle to open .XLSB files properly without corrupting complex formatting. Occasionally, .XLSB files are encrypted with enterprise DRM tools like Fasoo DRM, locking the data entirely from unauthorized users.
To ensure your data is accessible, safe, and readable across different platforms, you should convert .XLSB files to standard formats. Convert to XLSX for safe, macro-free editing in any modern office suite. Convert to CSV to extract raw data for databases, Python scripts, and API ingestion. For read-only sharing and printing, convert to PDF. Just drag and drop your file here to analyze and convert it - free, online, and without installing software.
Use Convert.Guru to open and convert your XLSB file.
Users also converted XLB, CPGZ, XLSX, BINARY, BIN, XLS, PDF, XLA, XSL, XLSM, DAT, PLS and DB files.
If you want to convert XLSB file to XLSM, WK1 or WK3, you can use Microsoft Excel or similar software from the "Binary Spreadsheet Storage" category. In the File menu, look for Save As… or Export….
To convert WQ1, XLSM, NOTES, QPW, WK3, WB2, WKS, 123, XLS, WB1, XLSX or WK1 files to XLSB, try Microsoft Excel or another comparable tool in the "Binary Spreadsheet Storage" category.
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 XLSB converter.