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Skill

The XLSX Skill

Read, build, and edit real Excel spreadsheets, formulas included, inside Claude.

No terminal neededOfficial

Published by the company that makes the product.

What it can access

Reads and writes .xlsx files you attach or ask Claude to create. No network access of its own.

Security note

Built and published by Anthropic. If the spreadsheet holds beneficiary names or exact locations, your Claude plan and privacy setting decide whether this is safe. Check the Claude entry in the tool catalogue first.

Before you start

A Claude.ai account. No download, no Node.js, no Docker, no API key.

How to install

  1. Open claude.com/plugins in a web browser and sign in to Claude.
  2. Search for “XLSX Skill”.
  3. Click Install. Claude can use it the next time you ask it to work with a XLSX file.

How to remove it

  1. Open claude.com/plugins and sign in.
  2. Find “XLSX Skill” under your installed plugins and click Remove. Nothing else to clean up.