Your CSV export from QuickBooks, Sage, or your bank has broken accents, mixed-up columns, or unreadable numbers? Drop the file. CleanSheet detects the encoding, fixes accents, repairs delimiters, and standardizes dates and numbers. Everything happens in your browser.
Last updated: March 5, 2026
Accounting software exports in Latin-1 or Windows-1252, but Excel expects UTF-8. Result: 'Montréal' becomes 'Montréal', 'Référence' becomes 'Référence'. You fix each cell manually.
Your CSV uses semicolons instead of commas, or tabs instead of semicolons. When you open it, all data ends up in a single column.
Some rows have 01/15/2026, others 2026-01-15, others Jan 15. Amounts mix commas and periods. Excel treats them as text and your formulas break.
Drop your CSV file. CleanSheet detects the encoding, identifies the delimiter, fixes accents, standardizes dates and numbers, and removes duplicates. In 30 seconds, you have a clean file.
UTF-8, Latin-1, Windows-1252 — CleanSheet detects your CSV's encoding and converts everything to clean UTF-8.
Commas, semicolons, tabs — the delimiter is auto-detected so your columns line up correctly.
Corrupted byte sequences are detected and repaired: é, è, ê, à, ù, ç become readable again.
All date and number formats are converted to a single consistent format so your formulas work.
CSV exports from QuickBooks and Sage systematically break French accents. CleanSheet repairs them automatically.
CSVs downloaded from your online banking often have non-standard delimiters and variable date formats.
Exports from systems like SAP, Dynamics, or Salesforce can have mixed encodings and inconsistent formats.
Your CSV file never leaves your computer. All processing happens in your browser.
After loading, you can disconnect from the Internet and keep cleaning files.
No sign-up, no password. You open the page and start.
Drop your CSV file and get a clean file in 30 seconds. No files are sent to any server.