I Built a 100MB Browser-Based CSV Cleaner After Getting Frustrated With Messy CRM Exports

CleanlyLoad — Thu, 26 Feb 2026 01:24:05 +0000

I kept running into the same issue: messy CSV exports from CRMs.

Duplicates. Blank rows. Extra whitespace. Broken email columns.

For smaller files, Excel works fine. But once files get larger, cleanup becomes repetitive and time-consuming.

So I decided to build a small browser-based tool to automate the common cleanup steps.

The Idea

I wanted something that:

The goal wasn’t to replace Excel or Power Query — just to simplify quick cleanup.

Technical Challenges

Handling large files in the browser is tricky.

Some things I had to consider:

I ended up using streaming techniques to avoid loading everything into memory at once.

What I Learned

The Result

The tool is called Cleanly-Load.

It’s free and processes files locally in the browser.

Here it is if you’re curious:

I’d love feedback from other developers — especially on performance and possible monetization ideas.

DEV Community: CleanlyLoad