Spreadsheets & data · ONLINE TOOL

Clean a CSV

Compare before/after, then remove stray spaces, blank rows and exact duplicates without changing the source file.

Local processingNo account required

USE CASES

When to use Clean a CSV?

Preview mechanical CSV cleanup before applying it to a copy: edge whitespace, repeated spaces, blank rows and exact duplicates.

CONCRETE EXAMPLE

BEFORE

1,050 rows · repeated spaces · 12 blank rows · exact duplicates

→

AFTER

Before/after comparison · per-rule impact · cleaned copy · original delimiter preserved

PRIVACY

Processed content is not uploaded to WorkToolset. Required libraries may be loaded by the site, but the file stays in the browser.

GOOD TO KNOW

Deduplication compares complete rows after the selected cleanup rules; it does not reconcile variants or typing mistakes.
Whitespace cleanup may be inappropriate for fields where spacing carries business meaning.
The on-screen preview is sampled, while export applies the rules to the complete file loaded in memory.

HOW IT WORKS

PRIVACY

Are my files uploaded to WorkToolset?

No. This tool runs locally in your browser.

Is my original file modified?

No. WorkToolset creates a new copy or export.

Do I need an account?

No for this free tool. Accounts are mainly used for favorites, presets and future workflows.