Convert JSON to XLSB
Convert JSON files to XLSB locally, completely free and with maximum privacy.
Drag and drop your files here
or click to browse local files (large files supported, limited only by browser RAM)
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How to convert JSON to XLSB
- Drop your .json files above, or click Upload Files. You can add many files at once.
- XLSB is already selected as the output. Open the settings (gear icon) to fine-tune the result.
- Click Convert All. SheetJS runs inside your browser through WebAssembly; nothing is uploaded.
- Download your .xlsb files as soon as each one finishes.
What to know about JSON to XLSB conversion
- XLSB is best for very large Excel workbooks that must open fast, and opens in Excel and LibreOffice.
JSON vs XLSB
| Feature | JSON (JSON Table) | XLSB (Excel Binary Workbook) |
|---|---|---|
| Multiple sheets | No | Yes |
| Formulas and formatting | No | Yes |
| Best for | APIs, JavaScript apps and data pipelines | very large Excel workbooks that must open fast |
| Opens in | code editors, browsers and every programming language | Excel and LibreOffice |
JSON (JSON Table): Tabular data as a JSON array of row objects, ideal for APIs and JavaScript applications.
XLSB (Excel Binary Workbook): A binary Excel format that loads and saves large workbooks faster than XLSX.
Conversion options
- Active sheet only or all sheets
- Custom output file name
Frequently asked questions
Is it safe to convert JSON to XLSB here?
Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.
Is there a file size limit?
There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.
Can I convert several JSON files at once?
Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.
Related conversions
Need the opposite? Convert XLSB to JSON.
Convert JSON to other formats
Convert other formats to XLSB
See every JSON converter and XLSB converter, or browse the full converter directory.