CSV Doctor
Find out why a CSV is broken, see what needs fixing and repair it locally before you try opening it again.
Your file is processed in this browser. Opselith does not upload the file or its contents. Files up to 500 MB are supported. Larger files are checked in a background worker so the page stays responsive. The Doctor never changes the original file.
What the Doctor found.
The diagnosis checks structure rather than guessing what your business data means.
What CSV Doctor can catch
Delimiter mismatches, inconsistent field counts, empty or duplicate headers, broken quotes, BOM and encoding issues, mixed delimiters and rows that no longer match the header.
Built for admin exports
Use it for CSV exports from Microsoft 365, Active Directory, HR systems, ticketing platforms and other operational tools. The repair happens locally in your browser.
Explore more Opselith tools.
Go back to the toolkit or switch to PowerShell Builder, CSV Toolkit or another utility.