,, commafield. A small, useful data workbench Files stay in your browser

CSV, WITHOUT THE MESS 01 / WORKBENCH

CSV cleaner and compare tool

Drop in a CSV, make your changes with confidence, and take the cleaned file back. Or compare two versions to see exactly what moved.

NO SIGN-UPNO FILE UPLOADSDOWNLOAD CSV

YOUR WORKSPACE / 02

Choose your task.

01

Add your CSV

No file selected

02

Make it tidy

A FEW THINGS TO KNOW / 03

Simple by design.
Careful by default.

01 / PRIVATE

Your files remain yours.

Processing happens in this browser tab. The site does not send your CSV to a server.

02 / HONEST

Preview before export.

See warnings about uneven rows or duplicated headers before relying on an output file.

03 / PRACTICAL

Works with real CSVs.

Quoted commas, line breaks inside cells, UTF-8 BOM and tab separated files are supported.

HOW IT WORKS / 04

Answers before you begin.

How do I remove duplicate rows from a CSV?

Choose a CSV file, turn on “Remove duplicates,” then match by the entire row or a selected column. Review the preview before downloading. When matching by a column, the first row for each value is kept.

How do I compare two CSV files?

Add both files, select a shared column with a unique value in each row, and choose “Find differences.” The report shows added, removed, and changed records across columns with matching names.

Are my files uploaded or stored?

No. Your files are read and processed in the browser. No account or upload endpoint is used. Optional analytics loads only after consent and does not receive file contents. See the privacy notice.

What file formats and limits are supported?

Use UTF-8 CSV or TSV files up to 15 MB each. Files with uneven columns, duplicated headers, or broken quoting need fixing before processing.

WORKED EXAMPLES

CSV cleaning & comparison guide ↗

Download two small CSV files, compare them by ID, and see the three expected differences before using your own data.