Click the "Select File" button above, and choose your XLSB file.
You'll see a preview.
Click the "Convert file to..." button to save your file in the format you want.
Convert XLSB to another file type
The converter easily converts your XLSB file to various formats - free and online. No Excel or extra software needed.
XLSB to XLSX
XLSB to PDF
XLSB to CSV
XLSB to XLS
XLSB to ODS
XLSB to TSV
XLSB to TAB
XLSB to DIF
XLSB to SLK
Convert a file to XLSB
The converter also works in reverse, so you can convert other Spreadsheet formats to XLSB with high quality output.
About XLSB files
The .XLSB file is a Microsoft Excel Binary Workbook, a high-performance spreadsheet format introduced in Excel 2007. Unlike the standard XLSX (XML-based) format, .XLSB stores data in binary form (BIFF12) inside a ZIP container. While this architecture allows for significantly smaller file sizes and faster load/save times for massive datasets, it creates substantial interoperability challenges. Because it is a proprietary binary format, many third-party tools, mobile viewers, and Python data libraries often struggle to parse it correctly without specialized drivers. Additionally, .XLSB files can internally store macros (VBA code) without a distinguishing extension like XLSM, creating a potential security ambiguity for IT environments. For maximum compatibility, users should convert .XLSB to XLSX for standard editing, CSV for database importation, or PDF for secure, uneditable distribution. Simply drag and drop to convert.guru to handle the format conversion instantly.
Use Convert.Guru to open and convert your XLSB file.
If you want to convert XLSB file to XLSM, WK1 or WK3, you can use Microsoft Excel or similar software from the "Large 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 "Large Spreadsheet Storage" category.
The XLSB 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 XLSB converter.