How to Clean a CSV File Online: Remove Duplicates and Empty Rows
Fix a messy CSV in about a minute: remove blank and repeated rows, trim extra spaces and tidy the headers.
Files exported from different systems are rarely clean. They can have extra spaces, empty lines, repeated rows or the wrong separator. Any one of these can make a database import fail or give you the wrong totals.
The CSV Formatter finds the separator for you, then cleans the file with the options you tick. You can also rename headers to one style, such as snake_case, and sort the rows by a column.
Check the result as a table before you download it, so you know the file is right before it goes anywhere.
How to use the CSV Formatter: step by step
- Open the CSV Formatter.
- Upload your CSV. The separator is found automatically.
- Tick what you need: trim spaces, remove empty rows, remove duplicate rows or tidy headers.
- Look at the table view, then download the clean CSV.
When to use the CSV Formatter
- Preparing a file for a database import
- Removing duplicate customers from a list
- Changing a semicolon file into a comma file
- Making headers the same across many files
Tip: Want to mark something? Highlight words, rows or columns, then download a Highlighted Excel file that keeps your colors.