Private · on device. Runs in your browser: your file is not uploaded. No sign-up.
To edit the table first, open it in the online spreadsheet. To check or tidy JSON, use the JSON formatter.
No. The file is read and converted inside this browser tab, which matters for customer lists and accounts.
Yes. The separator (comma, semicolon, tab or |) is worked out from the first lines and shown, and you can change it if it guessed wrong. CSV files saved by Excel in many European countries use semicolons.
No. Only plain numbers (12.5, -3, 110001) become numbers in Excel and JSON. Codes such as 007 or 011001, numbers longer than 15 digits and phone numbers with a + stay text exactly as they were.
It makes a list of objects, one per row, named by the header row. It reads a list of objects (nested objects become columns like address.city), a list of lists, a single object, or an API response holding one list, such as {"data": [...]}.
The values Excel shows are converted: formula results, and dates as 2024-05-06. Colours, fonts and merged cells are not carried over, because CSV and JSON have no place for them.
