Local, private conversion

Convert XLSB to JSON privately

Drop your XLSB file, preview the JSON result locally, and download without uploading your file.

Stays in your browser Adjust before saving PDF Studio included

Drop one or more files here or choose from your device One file opens the detailed view; several create a private batch. Processed on this device

Common source formats

AVIFBMPCSVDOCXGIFHTMLICOJPG

How to convert XLSB to JSON

Convert XLSB to JSON locally in your browser. The file is read on your device, rewritten for the selected format, and downloaded without an upload step.

Steps

Drop or choose your XLSB file.
Confirm JSON as the result format.
Preview the result when available, then download the converted file.

Best for

XLSB files.
APIs, configuration, and developer workflows.
Private browser-based conversion without an upload step.

What changes

APIs, configuration, and developer workflows.
Only the first worksheet is exported in this MVP.
Formulas are exported as cached cell values when present.
Formatting, charts, images, comments, and macros are not included.
Structured values are rewritten for the selected data format.

Can I convert XLSB to JSON without uploading?

Yes. ConvertRS runs supported conversions in your browser and keeps the file on your device.

What changes when I create JSON?

APIs, configuration, and developer workflows. Only the first worksheet is exported in this MVP. Formulas are exported as cached cell values when present. Formatting, charts, images, comments, and macros are not included. Structured values are rewritten for the selected data format.

What happens to my original XLSB file?

It stays on your device. The page reads the file locally so you can preview and download the converted result.