About MyDataFixer

Why we built MyDataFixer

Spreadsheets run a surprising amount of the world: class projects, invoices, customer lists, inventory and payroll. Small problems such as a duplicated row, a stray space or a date typed the wrong way can quietly produce wrong totals or make an import fail. Finding those problems by hand is slow, and most data-cleaning software is built for specialists.

MyDataFixer is designed for everyone else: students, office workers, freelancers, accountants and business owners who just want their spreadsheet to be right.

Our principles

• Privacy first. Files are opened and processed in your browser, on your device. We do not upload or store the contents of your spreadsheets.
• You stay in control. MyDataFixer explains what it found and lets you preview changes. Your original file is never modified.
• Plain language. Results are written for people, not data engineers.
• Free and open to everyone. No account and no payment are required to use the tools.

The tools

• Spreadsheet Error Detector: Scan Excel or CSV files for duplicates, blanks, bad dates, invalid emails and more.
• Spreadsheet Cleaner: Remove duplicates, trim spaces, fix capitalization and dates, edit cells, with undo and download.
• CSV Validator: Check CSV structure (headers, row lengths, quotes, separators, encoding) and repair problems with a preview.
• Excel to CSV Converter: Download a worksheet from an XLSX or XLS workbook as CSV, or every sheet at once as a ZIP.
• CSV to Excel Converter: Turn a CSV file into a clean XLSX workbook: numbers and dates become real Excel values, codes keep their zeros.

Get in touch

Have an idea, found a bug or need a feature? Visit the contact page.