Clean messy CSV files in your browser. Trim whitespace, normalise case, standardise formats, fill or flag empty values, and download the cleaned dataset.
Open CSV Data Cleaner → free, no sign-inReal-world CSV data is rarely clean. Leading and trailing whitespace, inconsistent capitalisation, mixed date formats, empty cells that should have a value, columns that are text when they should be numeric — these are the problems that break imports and throw off analysis. The CSV Data Cleaner detects and fixes them: trim whitespace, normalise case, standardise formats, fill or flag empty values.
Data analysts and engineers who spend time cleaning incoming CSV files before analysis or import — this automates the most common cleanup operations and shows you what changed before you commit.
No tutorials. No learning curve. Open it and get started.
No server uploads. Shows a summary of every change made so you can review exactly what was cleaned before downloading.
Completely free. No trial period. No premium tier for basic functionality. No account required. Use it as often as you need.
One job, done well. CSV Data Cleaner was built to solve a specific problem cleanly. No feature bloat, no ads, no distractions.
What cleaning operations are available?
Whitespace trimming, case normalisation, date format standardisation, number format cleaning, and empty cell handling.
Does it show what changed?
Yes — a summary of every change is shown before you download.
Will it change values I didn't expect?
Review the change summary before downloading to catch unexpected transformations.
Is the original file modified?
No — you download a new cleaned file.
Can I select which columns to clean?
Yes — cleaning operations can be applied per-column.
Free. Instant. No sign-in. Open it and get the job done.
Open CSV Data Cleaner on Doathingy.com →