Excel to CSV
Save any sheet of an .xlsx workbook as CSV, with dates written as dates and numbers without Excel's rounding noise.
Paste cells or a Google Sheets link
Output
How it works
Add your Excel file
Drop in a file, paste cells copied from Excel or Google Sheets, or paste a Google Sheets link.
Check the table
Every column is shown with what it holds - numbers, dates or text - so you can see it was read right before you save it.
Download the CSV
Or copy it, or send it straight to a new Google Sheet. Nothing is uploaded at any point.
Excel to csv: excel to csv converter, convert excel to csv
Excel to CSV: every sheet to its own CSV, with dates written as dates, times as times and long IDs kept exact. An Excel to CSV converter that runs in the browser; Excel to CSV to JSON in one go? Use Excel to JSON.
Why it matters
Private by design
Bank statements, payroll and customer lists never leave your computer: the file is read and written in your browser.
Nothing silently changed
Leading zeros, long ID numbers, commas inside quotes and line breaks inside cells come through exactly as they were.
Numbers stay numbers
Values like 1,234.50, $1,200 and 7% are recognised, so Excel and JSON get real numbers rather than text.
Questions
Are commas, quotes and line breaks inside cells handled?
Yes. Cells are read and written to the CSV standard (RFC 4180): a cell with a comma, a quote or a line break is quoted, and quotes inside are doubled, so nothing splits into the wrong column.
Will leading zeros and long numbers survive?
Yes. Cells are kept as the text they were: 00123 stays 00123 and a 16-digit account number is not turned into 1.23E+15. In Excel output, such cells are stored as text for exactly that reason.
Does it work with Google Sheets?
Paste a Google Sheets link (shared as "Anyone with the link") or copy the cells and paste them. To send a result to Google Sheets, use Open in Google Sheets: the table is copied and a new sheet opens, ready for Ctrl+V.
Is my data uploaded?
No. The whole conversion runs in your browser, so the file never leaves your computer.
Can it open a password-protected PDF or Excel file?
Yes. Drop it in and you are asked for the password; the file is unlocked in your browser and the password is never sent or saved. PDFs locked with RC4 or AES (up to AES-256, PDF 2.0) and Excel workbooks saved with Encrypt with Password both open. A PDF that only restricts copying or printing opens without asking. Without the password nothing is guessed: the file stays shut.
How big a file can it handle?
Hundreds of thousands of rows are fine on a normal laptop; the preview shows the first rows and the download has them all.