Free · no sign-up · no install
Feuille de calcul gratuite
A free online spreadsheet that opens straight in your browser. Type numbers and simple formulas into the grid, watch the totals update live, then download the result as CSV. No account, no Excel, no Google Sheets login. Nothing is stored on a server — reload the page and the sheet is empty again.
Your grid
Size it, then type into the formula bar below — click a cell and start typing, or press Enter.
Paste data in, download data out
Copy rows from Excel, Numbers or Google Sheets and paste them here: the delimiter (tab, “;” or “,”) is detected automatically. On a phone this is the fastest way to fill the grid.
What the grid understands
- 12,5 · 12.5 · 1 234,56
- =1+2*3 · =(A1+B1)/2 · =2^3
- =A1+B1 · =$A$1*C2
- =SUM(A1:B5) · =COUNT(A1:A10)
- =AVERAGE(B1:B9) · =MIN(…) · =MAX(…)
- =ROUND(A1*1,2;2)
An empty cell counts as 0 inside a formula (so =A1+A2 reads 0 while you are still filling the column), while text used in a calculation shows #ERROR. Argument separator: “;” in FR mode, “,” in EN mode. In FR mode the comma is the decimal mark, in EN mode the dot is. Errors stay inside the offending cell: #DIV/0!, #CIRC! (circular reference) and #ERROR — every other cell keeps computing, and CSV export stays locked until they are fixed.
How it works
Three steps, no account, nothing to install.
The sheet is already there: 20 rows × 8 columns by default. Change the size, or paste your own data to build it in one go.
Click a cell and type in the formula bar. Plain numbers, text, or formulas starting with “=” using + − × ÷ ^, cell references such as A1 or $A$1, and SUM / AVERAGE / MIN / MAX / COUNT / ROUND over ranges like A1:B5.
Select a range and the status bar shows its sum, average and count instantly. Download writes the computed values — never the formulas — with the delimiter and decimal mark of the locale you picked.
Built for a quick table, not a workbook
No sign-up, no upload, no server-side storage: the grid only lives in this tab. Reloading the page clears it, which is also the fastest way to start over.
Switch decimal mode and the parser follows: “1,5” is 1.5 in FR mode and stays plain text in EN mode, so pasted data is never silently mangled.
Paste straight from another spreadsheet (tabs or semicolons are sniffed for you) and download a .csv file that opens cleanly in Excel, Numbers or Google Sheets.
A circular reference shows #CIRC! in the cells involved, a division by zero shows #DIV/0!; the rest of the sheet keeps recalculating and the tab never freezes.
Arrow keys move the active cell, Shift+Arrow extends the selection, Enter opens the editor and moves down, Delete empties the selection.
100 rows × 26 columns (A–Z), one sheet, no charts, no pivot tables and no .xlsx import — a pasted or downloaded CSV instead.
FAQ
Is this spreadsheet really free and without an account?
Yes. There is no login, no email and no paywall: the whole calculation runs in your browser with plain JavaScript, and the CSV download is generated locally.
Is my data saved somewhere?
No. The grid lives in the page's memory only — no local storage, no database, no server round-trip. Closing or reloading the tab empties it, so download the CSV before you leave.
How do I write a formula?
Start the cell with “=”. You can use + − * / ^, parentheses, cell references (A1, $A$1) and the functions SUM, AVERAGE, MIN, MAX, COUNT and ROUND over ranges such as A1:B5. Example: =ROUND(SUM(A2:A9)*1,2;2) in FR mode.
Why does “1,5” behave differently in EN mode?
Because in EN mode the comma is a list/column separator, not a decimal mark. Choose FR mode for French-style numbers, or paste FR data with “;” separators so the columns stay intact.
Why is the CSV button greyed out?
Export is disabled while any cell holds an error token (#DIV/0!, #CIRC! or #ERROR) so you never download a broken file. Fix the highlighted cells and the button unlocks.
Can I open or save .xlsx files?
No — that is out of scope on purpose. Paste data in, then download a CSV, which Excel, Numbers and Google Sheets all open directly.