CSV Cleaner

Quickly clean messy CSV or Excel exports with preset rules for common formatting, normalization, and data cleanup tasks.

Upload messy CSV or Excel data and clean it instantly using CRK Dev presets.

Files Cleaned

Rows Processed

Clean Your Dataset

Want to test it first? Try with Sample CSV

Status: Ready

Results

Download Cleaned File Download Report Download Summary

How It Works

Upload file

Select your file and choose the preset that best matches your dataset.

Automatic cleanup

The tool applies preset cleaning rules to normalize and clean common data issues.

Download cleaned file + report

Download your cleaned output along with the generated summary and report files.

Tool Limits

Supports .csv and .xlsx inputs
Maximum file size: 10MB

Before / After Example

Before

name,email,state
  JOHN SMITH , JOHN@EMAIL.COM , maryland
john smith,john@email.com,MD
Jane Doe,, virginia

After

name,email,state
john smith,john@email.com,MD
jane doe,,VA

Need more than a quick cleanup?

Hire CRK Dev for larger or custom data work

This free tool is great for quick cleanup jobs. If you need deeper transformations, repeatable workflows, or help with larger messy datasets, I build custom Python-based data cleaning and automation solutions.

Large CSV, Excel, JSON, or YAML cleanup jobs
Scraped export cleanup and normalization
Custom validation, mapping, and transformation rules
Repeatable internal automation workflows

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