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.