Convert an Excel file to JSON locally - ideal for APIs and scripts, no upload, in your browser.
Running locally on your device ...
Running locally on your device ...
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Your files never left your device
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No re-upload neededThese tools accept .JSON - your file is handed over directly.
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
Excel workbooks are the working format of many teams - but a program, an API or a test fixture usually needs JSON. This tool builds that bridge directly, with no CSV detour.
This tool reads the workbook entirely locally in the browser (SheetJS, pure JavaScript). A single sheet becomes a plain JSON array of row objects (the column header becomes the key). With several sheets you get ONE JSON object mapping each sheet name to its own row array - the whole workbook stays in one file this way.
Nothing is uploaded - the conversion even works offline after the first load. Unlike online converters that send Excel files to a server, your workbook stays exclusively on your device.
| Input formats | XLSX |
|---|---|
| Auto-conversion | PDF, DOCX, SQLite |
| Output format | JSON |
| Batch processing | No |
| Processing | Locally in your browser (JavaScript) |
| File upload | None |
Limitations: A single sheet yields a flat JSON array; several sheets yield a {sheetName: [...]} object. Formulas become their computed values; formatting, charts and macros are dropped. Very large workbooks need memory. Encrypted (password-protected) Excel files are not supported.
No. The conversion runs entirely locally in the browser.
An object mapping each sheet name to its row array.
No, JSON has no concept of formulas - you get the last computed values.
Yes, use the "JSON to XLSX" tool.
Yes, in any current mobile browser just like on desktop.
JSON to Excel · SQLite to JSON · SQLite to Excel · XLSX to HTML · CSV to XML · CSV to JSON