Excel File Viewer

View Excel (XLSX, XLS) files online for free. Upload your spreadsheet and browse sheets in your browser. No installation needed — files processed locally, never sent to servers.

Your data never leaves your browser

CSV Viewer & Analyzer

View CSV files as a sortable, searchable table

JSON ↔ CSV Converter

Convert between JSON arrays and CSV files online

JSON Formatter & Beautifier

Format and validate JSON with syntax highlighting online

Frequently Asked Questions

Which Excel formats are supported?

XLSX (Excel 2007+) and XLS (older format). The tool reads all sheets and lets you switch between them.

Is my file safe?

Yes. The file is processed entirely in your browser using JavaScript. It is never uploaded to any server.