=TOOLS

Free tools, no sign-up

Everything runs client-side in your browser. Nothing is uploaded, and there is nothing to sign up for.

Formula builder

Pick what you're trying to do, fill in your cells, get the exact formula.

Dedupe, remove blanks, and trim messy data in your browser.

Paste any formula and see a plain-English breakdown.

Days between two dates, or add/subtract workdays from a start date.

Pick row count and column types, download realistic sample data as CSV.

UPPERCASE, lowercase, Proper Case, Sentence case, or camelCase.

Percent of, percent change, and percent-of-a-number — instantly.

Text to columns in your browser — comma, tab, custom, or fixed width.

Highlight duplicates in a pasted list, then copy unique or dupes only.

A1 to R1C1 both ways, plus a relative/absolute reference helper.

Ready-to-use budget, invoice, project, and tracker workbooks - direct .xlsx download.

Sample data for lookups, PivotTables, SUMIFS/COUNTIFS, and data cleaning practice.

26 places we cite for accuracy. We link to them; none has reviewed, endorsed, or collaborated on this site.

Official documentation

Educators and channels

Course platforms

AI & data tools