Convert Excel to JSON
Convert the first sheet of an Excel file (.xlsx) to JSON with types preserved (number, text, date, boolean), right in your browser. Fast, free and private — your file never leaves your device.
Drag your files: PDF, EPUB, HEIC, JPG, PNG, DOCX, XLSX, TXT, MD, etc.
Frequently asked questions
- Does Excel to JSON keep the data types (numbers, dates, booleans)?
- Yes. The conversion reads the type Excel stored in each cell: a number stays a number, a date becomes ISO text (yyyy-mm-dd), true/false becomes a boolean, and an empty cell becomes null. A ZIP code or phone number entered as text (e.g. 01310-100) stays text and keeps its leading zero.
- Is my file uploaded to a server?
- No. The conversion runs entirely in your browser — your spreadsheet never leaves your device. Nothing is uploaded, stored, or seen by anyone.
- Does it convert every sheet in the workbook?
- It uses the first sheet. If the file has more than one, a notice shows which sheet was converted, so you never lose data without knowing.
- Can I output NDJSON instead of a JSON array?
- Yes. There's an option to output NDJSON (one object per line), the format preferred by data pipelines and logs.