CSV Viewer and Converter: csv to xlsx converter

Smart delimiter detection for mixed CSV sources

CSV exports from different systems may use commas, semicolons, tabs, or pipes. This page detects likely delimiters automatically and renders the table with minimal setup.

If detection is not ideal for your file, you can manually switch the read separator and instantly reparse rows and columns.

Paste, upload, preview, and export in one flow

You can paste raw CSV text or upload .csv and .txt files. The preview table is optimized for desktop and mobile with internal horizontal scrolling inside the tool card.

After validation, export to XLSX for Excel and spreadsheet workflows, or regenerate CSV using another delimiter when needed.

• Read CSV from text paste or file upload.
• Auto or manual separator selection.
• Table preview with column and row count.
• Convert delimiter and copy/download normalized CSV.
• Export parsed table to XLSX.

Privacy and practical limits

Processing happens locally in your browser by default, so CSV content does not need to be sent to a backend for preview or conversion.

Very large files can still consume memory on low-end devices. For better mobile performance, split huge datasets into smaller chunks before inspection.