xlsx
Official sourceRead, edit, create, and fix Excel/CSV files — formulas, formatting, charts, and clean financial models with zero formula errors.
Source: Anthropic
At a glance
Verified source- Best for
- Building or auditing financial models with industry-standard color coding and zero formula errors
- Works with
- Claude.ai · Claude Code
- Outcome
- Cleaning messy tabular data (malformed rows, junk headers) into proper spreadsheets
- Source
- anthropics/skills
01 / Understand the skill
About xlsx
Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data); create a new spreadsheet from scratch or from other data sources; or convert between tabular file formats. Trigger especially when the user references a spreadsheet file by name or path — even casually (like \"the xlsx in my downloads\") — and wants something done to it or produced from it. Also trigger for cleaning or restructuring messy tabular data files (malformed rows, misplaced headers, junk data) into proper spreadsheets. The deliverable must be a spreadsheet file. Do NOT trigger when the primary deliverable is a Word document, HTML report, standalone Python script, database pipeline, or Google Sheets API integration, even if tabular data is involved.
Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data)…
Not a fit when
Do NOT trigger when the primary deliverable is a Word document, HTML report, standalone Python script, database pipeline, or Google Sheets API integration, even if tabular data is involved.
Read full description
Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data); create a new spreadsheet from scratch or from other data sources; or convert between tabular file formats. Trigger especially when the user references a spreadsheet file by name or path — even casually (like \"the xlsx in my downloads\") — and wants something done to it or produced from it. Also trigger for cleaning or restructuring messy tabular data files (malformed rows, misplaced headers, junk data) into proper spreadsheets. The deliverable must be a spreadsheet file. Do NOT trigger when the primary deliverable is a Word document, HTML report, standalone Python script, database pipeline, or Google Sheets API integration, even if tabular data is involved.
02 / Confirm the fit
Use xlsx when you need to
- Building or auditing financial models with industry-standard color coding and zero formula errors
- Cleaning messy tabular data (malformed rows, junk headers) into proper spreadsheets
- Editing existing .xlsx/.xlsm/.csv files while preserving the original template conventions
- Generating spreadsheets from other data sources with correct number formatting
03 / See the workflow
How xlsx works
- 01Install: npx skills add https://github.com/anthropics/skills --skill xlsx
- 02Try: "Clean the xlsx in my downloads and turn it into a proper revenue model."
- 03Get: a formatted .xlsx with assumptions cells, $ formats, and zero #REF!/#DIV/0! errors
Check before installing
Compatible platforms
Claude.ai · Claude Code
Best fit
Building or auditing financial models with industry-standard color coding and zero formula errors
Review the source instructions if the required output differs from the formats described above.
Install and use
Compatible with Claude.ai and Claude Code · Published by Anthropic
Ready to add xlsx?
Use the published instructions below, then provide the required input and describe the result you need.
General instructions · Claude.ai · Claude Code
npx skills add https://github.com/anthropics/skills --skill xlsx
Review the source repository and license before installing third-party skills.
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