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Xlsx Skill - Build & Analyze Spreadsheets with Claude

The Xlsx skill covers spreadsheet creation, formulas, formatting, and data analysis in Claude - see exactly how the skill is written and triggered.

Anthropic · Spreadsheets

First-party usage guide. The full implementation is linked upstream under its own terms.

Source text is documentation. These workflows have not been executed or tested by this site.

On this page

This is a ClaudeSkills editorial guide. Read the maintained upstream instructions for installation, supported tools and the terms of the package.

Define the task

Name the workbook, sheets and columns involved. Separate data cleaning, formula work and analysis. State which input cells must stay intact and where findings should go. Review formulas, units, date formats and totals.

Example request

Check this revenue workbook for inconsistent formulas.
Keep the input sheets intact. Put findings on a separate sheet.

This request is an example input; it is not a verified execution result.

Review the result

Keep the original input. Open the exported file and compare the changed parts before using it. Tell the agent which structure, values, references and visual details it must preserve.

Source and installation

The full upstream implementation is linked rather than repackaged here. Public source access does not grant an open-source license.

Spreadsheets · Source and installation · Source available