CSV to Excel Converter Free

Convert a CSV file into a properly formatted Excel spreadsheet with styled headers, frozen rows, and auto-sized columns. Handles international characters correctly.

About this tool

CSV files are widely used for data export but lack the formatting and structure of a spreadsheet. PDFwarp converts your CSV to a formatted Excel file with styled headers, alternating row colours, and optimised column widths.

How it works

  1. Upload your CSV file.
  2. Click Convert to Excel.
  3. Download your formatted .xlsx spreadsheet with styled headers.

Features

Tips for best results

Comma delimiter only

If your CSV uses semicolons or tabs (common in European locales), Excel will import the whole thing as one column. Convert to comma-separated first in a text editor, or save from the source as standard CSV.

UTF-8 keeps accents intact

Excel historically corrupts accented characters (é, ñ, ü) on CSV open. Our converter writes UTF-8 BOM explicitly so modern Excel renders these correctly — no mojibake.

Formulas don't auto-generate

Numbers stay as numbers, but SUM/AVERAGE formulas aren't inferred from the data. Add those yourself in Excel after the conversion — we convert, we don't interpret.

Frequently asked questions

What delimiter format is supported?

Comma-separated values (standard CSV). Files with semicolons or tabs may not parse correctly.

What encoding is supported?

UTF-8 and UTF-8 BOM encoded files. Other encodings may have special character issues.

Will my data formatting be preserved?

Data is extracted as-is. Header row is automatically styled with bold text and a dark background.

Will formulas be added?

No — values are converted as-is. Formulas are not added automatically.

What is the maximum file size?

10 MB for guests, 25 MB for free accounts, 500 MB for Pro.

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