File content type is invalid during upload

If you see the error "File content type is invalid" during file upload, it's usually related to your file format rather than a system issue. Clovi's parser handles hundreds of spreadsheet formats, but some edge cases require manual correction.

Try these solutions in order:

Option 1 — Re-save as CSV

Open the file in Excel, click "Save As", and save in .csv format. Then upload the CSV file.

Option 2 — Copy to a clean text file

If the CSV approach doesn't work, your spreadsheet may contain macros or functions that conflict with our parsers. Copy all data from the spreadsheet, paste it into a plain text editor (not Word), and save the text file with a .csv extension. This is the most reliable approach.

Common causes

• Excel macros embedded in the file
• Non-standard character encodings
• Encrypted or password-protected files
• Files created by non-standard spreadsheet applications