Excel to CSV Converter
CSV is the format nearly every database, CRM and analytics tool accepts for imports. Exporting from Excel is easy on a desktop but awkward on a phone or a locked-down work machine, and uploading a customer list to a random website is rarely acceptable. This converter parses the workbook locally.
Runs in your browser — the file is never uploaded
Drop any file to begin
Images · Documents · Data · Audio · Video — processed locally in your browser
How to convert XLSX to CSV
- 1Drop your .xlsx or .xls file onto the converter above.
- 2Choose CSV as the output format.
- 3Convert and download the CSV.
Things worth knowing
- Only the first sheet is exported — split multi-sheet workbooks in advance if you need all of them.
- Postcodes, phone numbers and IDs keep their leading zeros instead of being mangled into numbers.
- Choose JSON instead if you are feeding an API rather than a spreadsheet import.
XLSX to CSV — frequently asked questions
Are formulas exported?
The calculated values are exported, which is what CSV imports expect. Formula expressions themselves cannot be represented in CSV.
Are my files uploaded to a server?
No. AllConverter runs the whole conversion inside your browser tab using WebAssembly and the Canvas API. Your file never travels over the network, which you can confirm by watching your browser's Network tab while you convert.
Is there a file size or daily limit?
There is no daily cap and no account. The only practical limit is your device's memory, since the file is processed locally — very large videos are the one case where a desktop browser handles the job far better than a phone.