What it is

XLSX Viewer opens Excel, CSV and OpenDocument files and offers conversion and cleaning tools, including contact files (vCard). Everything runs in your browser, so your files are not uploaded.

Why it runs on your device

XLSX Viewer is a set of free tools for spreadsheets and contact files. Every tool runs in your browser, on your own device. When you open a file, the page reads it locally and never uploads it to a server, so your data stays with you. After your first visit the tools keep working offline, and there is nothing to install and no account to create. If a file does not open or convert correctly, or a tool you need is missing, please tell us through the contact page.

How to check the privacy claim

See the privacy page and the offline test. Anyone can repeat both.

Contact

Write to [email protected].