Is my spreadsheet uploaded to a server?

No. The .xlsx file is opened and edited entirely in your browser, and the edited file downloads straight from the browser. Only a compact text snapshot of the cells being discussed is sent to the AI model when you send a chat message.

Which file formats does Excel Editor support?

It opens .xlsx and .xlsm workbooks plus .csv and .tsv files, and downloads .xlsx (or exports the active sheet as .csv). Existing formatting, formulas, merged cells, column widths, frozen panes and untouched sheets are preserved on save.

Do the AI's charts and formatting open in desktop Excel?

Yes. Charts are written as native Excel chart XML and formatting uses real Excel styles, so the downloaded workbook opens in Microsoft Excel, Excel for the web, Google Sheets and LibreOffice.

What does the AI assistant cost?

The editor itself is free. Assistant messages are usage-priced through SkillSafe credits — a typical message costs about one cent on the default model. A small free daily allowance lets you try it without signing in.

Can it build pivot tables or run macros?

Not yet. Ask for a SUMIFS or COUNTIFS summary table instead of a pivot — the assistant builds one with live formulas. Macros in .xlsm files are preserved when you save, but they do not run in the browser.

What the AI assistant can do

Excel Editor is a free online spreadsheet editor with an AI copilot. Open any .xlsx, .xlsm or .csv — or start blank — and tell the assistant what you want in plain English. It reads your sheet, applies real edits to the grid instantly (with one-click undo), and everything saves back to a normal Excel file. Every prompt below is real — click Try it to open the editor with sample data and the prompt ready to send.

1Ask questions about your data

The assistant sees your sheet — values and formulas — and answers directly, without changing anything.

Which region had the highest total, and how fast did each one grow?Try it

Summarize this sheet in three bullet points.Try it

Are there any outliers or suspicious values in this data?Try it

2Enter data and write formulas

It writes real Excel formulas — recalculated live in the grid and saved into the file. Select a range first and say "this" to scope the request.

Total each numeric column below the data.Try it

Add a "Growth %" column: June vs January for each region, formatted as a percentage.Try it

Add an Average row under Total, styled like the Total row but italic.Try it

Fill 12 months of dates in column A starting 2026-01-01, one row per month.Try it

3Format like a pro

Fonts, fills, borders, number formats, alignment, merges, column widths, frozen headers — described in words, applied in one shot.

Format the header row: bold white text on green, centered, and freeze it.Try it

Format columns B to E as currency with no decimals and size the columns to fit.Try it

Add subtle zebra striping to the data rows and a medium top border on the totals.Try it

4Build complete templates

Ask for a whole document and it builds the layout, formulas, formatting and widths in one reply — on a fresh sheet so nothing of yours is touched.

Build a monthly budget template with income, expense categories, and savings rate.Try it

Create an invoice template for a freelance designer, with line items, subtotal, 8% tax and total.Try it

Make a project tracker: task, owner, status, due date, days remaining (computed).Try it

5Insert real Excel charts

Column, bar, line, area, pie, doughnut and scatter charts — previewed live on the grid and written as native chart XML that opens in desktop Excel.

Add a column chart of sales by region next to the data.Try it

Add a pie chart of June sales by region below the table.Try it

6Sort and restructure

Sorting, inserting and deleting rows or columns, renaming and adding sheets, freezing panes — formulas are re-pointed automatically when rows shift.

Sort the data by the June column, highest first.Try it

Turn this data into an Excel table with filter dropdowns.Try it

Add a note to B9 reminding me to verify the North total.Try it

Move the totals to a new "Summary" sheet with one row per region.Try it

The grid itself also has Excel's daily-driver tools: filter dropdowns (Data → Filter, or any table header), Find & Replace (Ctrl+F), hide/unhide rows and columns (right-click a header), cell notes (right-click a cell), pictures (Insert → Image), and draggable, resizable charts. Conditional formatting in opened files — color scales, data bars, highlight rules — renders right in the grid.

7Multi-step jobs

The assistant chains everything above in a single request — and remembers the conversation, so you can refine step by step.

Turn this raw data into a polished report: title, formatted headers, totals, growth column, and a chart.Try it

💡 Tip: after any AI edit, press Ctrl+Z (or the Undo link under the reply) to roll the whole change back. Your selection is the assistant's context — select a range and say "format this".

How it works — and what stays private

Your workbook is opened, edited, recalculated, and saved entirely in your browser — the file itself is never uploaded. When you message the assistant, the app sends a compact text snapshot of your sheets (the cells and formulas being discussed) to the AI model, which replies with structured edit commands the app applies locally. Formatting from the original file — styles, merges, column widths, frozen panes, even sheets the assistant never touched — survives byte-for-byte on download.

The assistant runs on your choice of model (GPT-5.6, Claude, Gemma) through the SkillSafe platform. A typical message costs about a cent; a small daily allowance is free without an account.

Formula functions the editor recalculates live

Math & stats: SUM, AVERAGE, COUNT, COUNTA, COUNTBLANK, MIN, MAX, MEDIAN, PRODUCT, ABS, SIGN, SQRT, POWER, EXP, LN, LOG, LOG10, MOD, INT, TRUNC, ROUND, ROUNDUP, ROUNDDOWN, CEILING, FLOOR, PI, RAND, RANDBETWEEN, SUMPRODUCT, STDEV, STDEVP, VAR, VARP, SMALL, LARGE, RANK · Conditional: SUMIF, SUMIFS, COUNTIF, COUNTIFS, AVERAGEIF, AVERAGEIFS · Logic: IF, IFS, IFERROR, IFNA, AND, OR, NOT, XOR, SWITCH, CHOOSE · Lookup: VLOOKUP, HLOOKUP, XLOOKUP, LOOKUP, INDEX, MATCH, ROW, COLUMN, ROWS, COLUMNS · Text: LEFT, RIGHT, MID, LEN, LOWER, UPPER, PROPER, TRIM, CLEAN, CONCAT, CONCATENATE, TEXTJOIN, SUBSTITUTE, REPLACE, REPT, FIND, SEARCH, EXACT, CHAR, CODE, VALUE, TEXT · Date & time: TODAY, NOW, DATE, TIME, DATEVALUE, YEAR, MONTH, DAY, HOUR, MINUTE, SECOND, WEEKDAY, DAYS, EDATE, EOMONTH, DATEDIF · Info: ISBLANK, ISNUMBER, ISTEXT, ISLOGICAL, ISERROR, ISNA, ISEVEN, ISODD, N, NA, HYPERLINK, FORMULATEXT

Keyboard shortcuts

Enter / Tab	Commit a cell and move down / right (Shift reverses)
F2	Edit the active cell
Ctrl+Z / Ctrl+Y	Undo / redo (AI edits included)
Ctrl+C / X / V	Copy, cut, paste — interoperates with desktop Excel via the clipboard
Ctrl+B / I / U	Bold, italic, underline
Ctrl+Arrow	Jump to the edge of the data block
Ctrl+A	Select the used range
Ctrl+F	Find & replace
Ctrl+Shift+L	Toggle filter dropdowns
Ctrl+S	Download the workbook
Alt+=	AutoSum (via ∑ in the ribbon)

FAQ

Is my spreadsheet uploaded to a server?: No. The file is opened and edited entirely in your browser, and the edited file downloads straight from the browser. Only a compact text snapshot of the cells being discussed goes to the AI model when you send a message.
Which file formats are supported?: Opens .xlsx, .xlsm, .csv and .tsv; downloads .xlsx (or exports the active sheet as .csv). Existing formatting, formulas, merges, widths, frozen panes and untouched sheets are preserved.
Do the AI's charts and formatting open in desktop Excel?: Yes — charts are native Excel chart XML and formatting uses real Excel styles, so files open cleanly in Microsoft Excel, Google Sheets and LibreOffice.
What does it cost?: The editor is free. Assistant messages are usage-priced via SkillSafe credits — about a cent per message on the default model, with a small free daily allowance for trying it out.
Can it build pivot tables or run macros?: Not yet — ask for a SUMIFS/COUNTIFS summary table instead and the assistant builds one with live formulas. Macros in .xlsm files are preserved on save but don't run in the browser.
Does conditional formatting work?: Rules already in your file — color scales, data bars, highlight rules, top-10, duplicates — render live in the grid and are preserved on save. Creating new rules isn't supported yet; ask the assistant for equivalent plain formatting instead.

Open Excel Editor →