Launched CleanMySheet - Privacy-first CSV & Excel cleaner that runs entirely in your browser

Hey everyone,

I just launched CleanMySheet (cleanmysheet.in).

The problem I wanted to solve:

I kept running into situations where I needed to clean messy CSV or Excel files (duplicates, mixed date formats, split names, phone numbers, etc.), but I didn’t want to

• Upload customer/CRM data to random online tools

• Install heavy desktop software

• Write one-off Python scripts every time

• So I built a fully client-side cleaner that never uploads your file.

What it does:

• Works with CSV, XLSX, and XLS

• Scans the file first and suggests fixes

• You review and apply only what you want

• Remove duplicates (exact + fuzzy)

• Standardize dates

• Split full names

• Format phone numbers & emails

• Trim whitespace, clean empty values, and more

• Download a “recipe” so you can re-apply the same cleaning steps later

Strict mode is on by default - nothing leaves your device.

Free to use (export up to 500 rows). Pro (unlimited) is coming soon.

I’d really appreciate any feedback - especially from people who regularly deal with messy exports from CRMs, finance tools, surveys, etc.

Link: https://cleanmysheet.in

Thanks!