A spreadsheet that runs in your browser.
Open an .xlsx or .csv, edit it, save it back. No account, no
install, and nothing is uploaded — the file is read and written on your own machine.
Or drag a spreadsheet onto the editor to open it. Your work is autosaved in this browser.
Continue where you left off
Stored in this browser only. Clearing site data removes them.
What it does
-
Real files, both ways
Opens
.xlsx,.xlsand.csv, and saves back to.xlsxor.csv— so what you make here opens in Excel, Numbers or Google Sheets. -
Formulas
The usual library —
SUM,IF,VLOOKUP,INDEX/MATCHand several hundred more — recalculated as you type. -
Formatting
Fonts, sizes, colours, borders, alignment, merges and number formats: currency, percentages, dates and custom patterns.
-
Freeze panes
Pin the top row, the first column, or everything above and left of the selection, so headers stay put while you scroll.
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Find & replace
Search the sheet with match-case and whole-cell options, step through the hits, and replace one or all — as a single undo step.
-
Sort
Sort the selected rows by their first column, ascending or descending, with numbers, text and blanks each ordered sensibly.
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Light and dark
A true-black dark theme that covers the grid itself, not just the chrome. Follows your system by default.
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Nothing leaves the page
There is no server to send a file to. Everything runs in the tab, and your work is autosaved into this browser so a refresh never loses it.
Keyboard shortcuts
| Open a file | Ctrl + O |
|---|---|
| Save as .xlsx | Ctrl + S |
| Save as… | Ctrl + Shift + S |
| Find | Ctrl + F |
| Replace | Ctrl + H |
| Undo / redo | Ctrl + Z / Y |
On a Mac, use ⌘ in place of Ctrl.
Questions
Are my files uploaded anywhere?
No. The editor is a static page: opening a file reads it with the browser's own file APIs, and saving writes it straight back to your downloads. There is no server that receives your data.
Do I need an account?
No. Open the editor and start typing.
Where is my work stored?
In this browser. The editor autosaves the open workbook, and keeps the last few you opened, so a refresh or a crash does not lose anything. Clearing site data clears them — save to a file for anything you want to keep.
Will it open a file made in Excel?
Yes — .xlsx, older .xls, and .csv. Values,
formulas and most formatting come across. Very Excel-specific features, such as pivot
tables, macros and charts, do not.
Does it work offline?
Once the page has loaded, yes: editing, formulas and saving all run locally. You need a connection only to load the page the first time.
Is there a charts feature?
Not yet. Everything else on this page is there today.