Free, privacy-first CSV to Excel converter. Transform your CSV files to Excel (.xlsx) directly in your browser. No uploads, no servers.
Your CSV file stays on your device. No data is sent to any server. Everything runs locally in your browser using DuckDB WASM.
Auto-detects numbers, dates, and text from your CSV. Column types carry over to Excel so formulas and sorting work immediately.
Powered by DuckDB, the same engine used in data engineering. Handle CSV files with millions of rows without crashing your browser.
Filter, sort, aggregate, pivot, or add calculated columns before exporting. Clean your data on the way to Excel.
No sign-up, no trial, no watermarks. Convert as many CSV files to Excel as you need, completely free.
Once loaded, ExploreMyData works without an internet connection. Convert CSV to Excel even on a plane.
Drag a .csv or .tsv file onto the page. It loads instantly.
Filter rows, fix columns, or add calculations before export.
Click Export, choose .xlsx, and download your Excel file.
Open exploremydata.com/app, drag your CSV file onto the page, then click Export and choose Excel (.xlsx). Your file converts instantly in your browser.
Yes. ExploreMyData runs entirely in your browser using DuckDB WASM. Your CSV file is never uploaded to any server. All processing happens locally on your device.
Absolutely. You can filter rows, sort columns, add calculated fields, aggregate data, and apply 32+ transformations before exporting to Excel.
Yes. ExploreMyData auto-detects column types (numbers, dates, text) from your CSV and preserves them in the Excel output so formulas and sorting work correctly.
No sign-up, no upload, no tracking. Just drop your file and export.
Convert CSV to Excel Free