Free online XLSB-to-XLSX converter — upload a XLSB file and download a XLSX. Fast, private, no signup.
Drag and drop your XLSB into the converter above, or click to choose it. Large files upload straight to storage with a progress bar — and we detect the real format from the file's bytes, so even a mislabeled file works.
XLSX is already selected as the target. Any options that apply to a XLSX — quality, resize, rotate and more — appear automatically; tweak them or leave the defaults, then start the conversion.
Your XLSX is ready in seconds. Download it, inspect or strip its metadata, or share it with a private link — your choice.
Drop your XLSB file into the converter above — we auto-detect the real format from its bytes, convert it, and give you a XLSX to download. No software to install.
Yes. Convert XLSB to XLSX for free right in your browser, with no account needed to get started.
Your file is transferred over an encrypted connection and anonymous uploads are temporary. You can also view and strip metadata (location, device, author) before you download.
Excel Binary Workbook — a fast, compact binary Excel format; convert-from only. Office Open XML spreadsheet (Excel).
Convert XLSB to: CSV · ODS · TSV · PDF · JSON · HTML · MD · YAML · PARQUET · ARROW
Convert to XLSX from: ARROW · AVRO · DTA · FEATHER · JSON · NDJSON · ORC · PARQUET · SAV · XML