How to edit a CSV file (the simple way)

Step 1 — Open the file

Go to opencsv.io and either drag your CSV file onto the page or click 'Open' in the toolbar to pick a file. The file loads entirely in your browser; nothing is uploaded.

Step 2 — Make your edits

Step 3 — Save

When you're done, you have two options:

• Click 'Download' to save the edited CSV to your device
• Click 'Save' to put it in your private cloud library (paid users)

Common edits people make

• Fix a typo in a customer name or email
• Remove duplicate rows from an export
• Add a new product to a Shopify import
• Update prices across an inventory list
• Strip out a column you don't want shared
• Add a header row to a file someone forgot to label

What to avoid

Don't open CSV files in Excel just to edit them — Excel often reformats data on save (drops leading zeros, converts dates, mangles long numbers). If you need to edit data without changing it, a dedicated CSV editor like OpenCSV is safer.