Fix Your CSV.
In Seconds.
Find CSV errors, preview fixes, and download a clean file.
Free, private, and entirely in your browser.
Your file stays yours. It never leaves your device.
A few common questions.
Less mystery. Cleaner data.
What is a CSV file?
A CSV is a plain-text table. Each record is a row, and a separator, usually a comma, divides its values. Spreadsheets and many business tools use CSV files to exchange data.
How does CommaMend find CSV errors?
CommaMend checks quotes, separators, column counts, headers, empty and duplicate records, whitespace, and possible encoding problems. It also flags unusual data types for you to review.
Can CommaMend automatically fix broken CSV files?
It prepares repairs for you to preview and approve. When a repair could change meaning, such as combining extra fields, you choose the intended change. Some problems need a manual edit.
Are my CSV files uploaded to a server?
No. Files are read and processed locally in your browser. CSV URL imports connect directly to the source you enter, which must allow cross-origin requests.
Can I edit CSV errors manually?
Yes. Edit Manually opens the affected cell or header. You can review its original value, save or cancel, and undo or redo changes.
Is CommaMend completely free?
Yes. There are no accounts, subscriptions, or paid features. Files up to 20 MB and 150,000 records are supported to protect browser memory.