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Move tabular data between Excel and CSV.

Convert XLSX worksheet values to UTF-8 CSV, or turn CSV fields into an XLSX text workbook. Choose delimiters, preview rows and download without uploading.

Free · No login · No upload. Inputs and results stay in this tab’s memory. Clear or leave to discard them; keep your own downloaded copies.

Office files: up to 10 MB. CSV: UTF-8 up to 2 MB. No legacy DOC/XLS, encrypted files, macros or merged tables. Unsupported structures stop conversion; no partial result is returned.

Saved display values only, without recalculation. Hidden rows and columns inside your range are included; hidden sheets are unavailable. Up to 10,000 rows, 100 columns and 100,000 cells per workbook.

What changes when Excel becomes CSV?

CSV exports one visible sheet or selected range as saved display values. There are no formulas, types, colors, charts, images, comments or multiple sheets in one CSV. Hidden rows and columns inside the range are included. Formula results may be stale; recalculate and save first. Missing formula results and Excel errors stop the job.

Can CSV to Excel preserve leading zeros?

Yes. Every CSV field becomes an explicit text cell, including identifiers, dates and formula-like strings. This preserves 00123 without guessing numeric types. Numeric calculations require deliberate conversion in Excel. This tool does not infer which fields are IDs, money or dates.

How does CSV formula protection work?

On CSV export, values beginning with formula-like characters receive a protective apostrophe. The result reports the number of changed cells; the preview shows original values. This may also prefix ordinary negative values. Import columns as text and inspect the safety prefix. CSV cannot enforce a type when another application opens it.

Which limits apply?

Use standard XLSX up to 10 MB, or UTF-8 CSV up to 2 MB. Select comma, semicolon or tab explicitly. Up to 10,000 rows, 100 columns and 100,000 cells are accepted; CSV rows must have consistent lengths. No XLS, XLSM, encrypted workbooks, macros, external workbook links or selected merged cells. No partial or truncated output is returned.