How to fix "line contains NUL / line contains NULL byte" in Excel, Google Sheets, databases
_csv.Error: line contains NUL / line contains NULL byte
What this error means
The file contains zero bytes, which CSV readers reject.
Why it happens
- Exported as UTF-16 by Excel or another tool
- Storage or transfer damage
How to fix it
- Re-export as "CSV UTF-8" if you can
- Upload it here to remove the NULL bytes and convert to UTF-8
About CSV file files
CSV is plain text: one row per line, values separated by commas. Most CSV "errors" are encoding problems (accents turning into garbage), stray NULL bytes, or rows with the wrong number of columns.