FileMixer / Excel to JSON
Convert Excel to JSON
Turn a sheet into a JSON array keyed by the column names in the first row, or export every sheet as one JSON object.
Your files stay on your device. FileMixer opens them inside this browser tab. Nothing is uploaded, and the page is blocked from sending data anywhere. How we know
1 Add your file
2 Options
3 Check and download
How to use it
- Add your .xlsx, .xls or .ods file.
- Pick a sheet, or check “Convert every sheet” to get an object with one list per sheet name.
- Download the JSON.
Questions
Are dates converted?
Dates come out as the text Excel shows, such as 3/14/2026. If you need ISO dates (2026-03-14), format the column that way in Excel first.
What about Excel files with several sheets?
When a workbook has more than one sheet, a menu appears next to the file so you can pick the sheet to use.
How big a file can it handle?
Files of a few hundred thousand rows work in a normal laptop browser. The work happens in your computer's memory, so a phone or an older machine slows down sooner. A 50,000-row file takes a second or two.
Other tools
Need this done for you, or every week?
Web Landscapes can clean and combine your files for you, or set it up to run on its own: a monthly report merged from branch files, a price list matched to a supplier feed. Tell us what you have and we'll quote it.