Add your XLSX file
Drag and drop your XLSX file into the drop zone above, or click the box to browse for a file.
Click Convert
The conversion happens locally in your browser. No upload, no server, no waiting in queue.
Download the JSON file
When the conversion finishes, the JSON file is ready to download. Save it anywhere on your device.

FAQ

common questions

Is the XLSX to JSON converter free?

Yes. Every conversion on this site is free, with no signup, watermark or file count limit.

Are my files uploaded to a server?

No. Conversion runs entirely in your browser using SheetJS. Your files never leave your device, so we cannot see them even if we wanted to.

Is there a file size limit for XLSX to JSON?

There's no hard limit. In practice, file size is bounded by your device's available memory — typically several hundred megabytes work fine on a modern computer.

Does it work offline?

Once this page has loaded, yes. You can disconnect from the internet and the converter will still work. Reloading the page does require connectivity.

Will my XLSX file lose quality when converted to JSON?

It depends on the formats involved. Converting between lossy formats (JPG, MP3) re-encodes data and slightly reduces quality. Lossless formats (PNG, WAV, FLAC) preserve everything. Pixel dimensions and color depth are preserved for image conversions.