clean-data-xls

Clean and standardize messy Excel and .xlsx spreadsheet data.

Updated Mar 17, 2026
One-click install
npx skills add https://github.com/AlexZWANG1/Prism --skill clean-data-xls-alexzwang1
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: clean-data-xls
Source: https://github.com/AlexZWANG1/Prism/tree/main/financial-services-plugins/financial-analysis/skills/clean-data-xls
Command: npx skills add https://github.com/AlexZWANG1/Prism --skill clean-data-xls-alexzwang1

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Clean messy spreadsheet data by trimming whitespace, fixing inconsistent casing, converting numbers stored as text, standardizing dates, removing duplicates, and flagging mixed-type columns. This prepares data for analysis and reporting with minimal manual intervention.

Core Features & Use Cases

  • Normalize data across columns by trimming whitespace, standardizing case, and converting numbers stored as text
  • Remove duplicates and identify mixed-type columns to improve data quality
  • Handle either in Excel (Office Add-in) or standalone .xlsx workflows with safe, formula-based transformations

Quick Start

Open your Excel workbook or standalone .xlsx file, select the range to clean (or use the full used range), and run the data-cleaning workflow to produce a clean, analysis-ready sheet.

Frequently Asked Questions about clean-data-xls

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I clean messy Excel spreadsheet data automatically?

To clean messy Excel spreadsheet data, this workflow automates trimming whitespace, standardizing casing, converting numbers stored as text, and removing duplicates. It applies transformations safely using formula-based helper columns before overwriting originals.

What is the best way to standardize dates and fix inconsistent casing in .xlsx files?

The best way to standardize dates and fix inconsistent casing in .xlsx files is using formula-based transformations like DATEVALUE and UPPER. The workflow detects these issues, proposes fixes, and applies them across your selected range.

Can I remove duplicates and flag mixed-type columns in an Excel workbook?

Yes, you can remove duplicates and flag mixed-type columns in an Excel workbook. The workflow identifies mixed-type columns to improve data quality and removes duplicate rows across either a selected range or the full used range.

Does this data cleaning workflow permanently overwrite my original spreadsheet data?

This data cleaning workflow does not permanently overwrite your original spreadsheet data. It enforces a non-destructive process by preferring formulas and using helper columns, only overwriting originals with your explicit confirmation.

How do I convert numbers stored as text in Excel for data analysis?

To convert numbers stored as text in Excel, the workflow applies the VALUE formula within helper columns. This ensures your data is analysis-ready while keeping the original text values safe from immediate modification.

Do I need an Excel Office Add-in to clean standalone .xlsx files?

You do not need an Excel Office Add-in to clean standalone .xlsx files. The workflow handles both Office Add-in environments and standalone .xlsx files, allowing you to prepare data for analysis with minimal manual intervention.