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XLSX is the modern Excel spreadsheet format introduced with Microsoft Office 2007. It uses ZIP compression and an XML-based structure, resulting in smaller files and better compatibility. XLSX supports advanced spreadsheet features and is widely used in business and data analysis.
CSV is a simple text format used to store tabular data, such as spreadsheets or databases. Each line represents a row, and values are separated by commas. CSV files are supported by nearly all spreadsheet and data-processing programs, making them a universal choice for data exchange.
Convert your .xlsx files to .csv right in your browser — no downloads, no installs. Everything happens securely in the cloud.
We never store your files permanently. Only you can access them, and they’re automatically deleted from our servers within 2 hours.
Turn your XLSX files into CSV in just a couple of clicks. No registration, no limits — and it’s 100% free.