Clean a CSV before it causes trouble.

Trim stray spaces, standardize blank cells, remove exact duplicate rows, flag repeated keys, and download a clean copy—with a reconciliation summary.

Your file stays in this browser.
Nothing is sent to a server. Avoid sensitive personal, payment, medical, or government data.

Local CSV cleaner

Drop a CSV here or choose a fileUp to 5,000 data rows · UTF-8 CSV

Choose CSV

No file selected.

0input rows

0clean rows

0exact duplicates removed

0rows normalized

Flag repeated values in a key column

Need judgment, not just automation?

$20 pilot

One CSV or Excel file, up to 5,000 rows and three sheets, when the agreed cleanup fits within one hour. You receive the cleaned file and a plain-language exception summary.

DeduplicationFormat normalizationFile mergingReconciliation

Request the pilot through the marketplace post that brought you here. Include file type, approximate rows and sheets, and the result you need.

What this tool does—and doesn’t

Trims outer whitespace and collapses repeated spaces.
Normalizes empty values to blank cells.
Removes exact duplicates only after that normalization.
Flags repeated keys without guessing which record is correct.
Does not infer dates, merge similar names, or invent missing data.

Those uncertain cases are exactly what the assisted pilot is for. AI-assisted tooling may be used; every paid deliverable is manually checked against the agreed rules.

Synthetic demonstrations and browser utility—not a claim of prior client work. Review downloaded results before replacing any original file.