Word documents (docx)
Documents & Files
Have Claude write and edit real Word files, with headings, tables and tracked changes.
Documents & Files
Excel spreadsheets (xlsx)
Create and fix spreadsheets with working formulas, formatting and charts.
FreeBy Anthropic
View source What is it?
Teaches Claude to open, build and repair Excel files (and CSVs) properly. It writes real formulas rather than pasting in numbers, so the sheet still recalculates when you change an input, and it checks for formula errors before handing the file back.
Without it, Claude often returns a table of static values that breaks the moment you edit a cell. With it, you get a workbook with sensible formatting, named tabs and totals that behave like a human built them.
Install in Claude Code
In Claude Code run /plugin marketplace add anthropics/skills, then /plugin install document-skills@anthropic-agent-skills. That one plugin installs the Word, Excel, PowerPoint and PDF skills together.
Try this prompt
Paste into Claude Code
Clean up this messy export from our booking system and turn it into a monthly revenue spreadsheet with totals by service and a chart.Who it's for
Anyone who lives in spreadsheets for budgets, reporting, pricing or cleaning up exported data.
Best for
- Budgets and forecasts
- Cleaning messy exports
- Ad spend and campaign reports
- Pricing calculators
Why it made the list
The zero-formula-errors rule alone saves more time than any other spreadsheet trick we have seen.
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