---
title: "XLSX to CSV — Excel Export, Private, Free | Compress Pro"
description: "Convert Excel XLSX files to clean CSV right in your browser — pick the delimiter, dates and formulas come out as values. Nothing is uploaded. Free."
canonical: https://compress-pro.com/xlsx-to-csv
---

# Convert XLSX to CSV.

> Excel sheets exported as clean CSV — all on your device.

Convert Excel workbooks to clean CSV entirely in your browser — **dates and formulas come out as the values you see in Excel, and the delimiter is yours to pick**. Drop .xlsx or legacy .xls, download the .csv. Nothing is uploaded.

**No uploads · No ads · Free & open source.**

## How it works

1. Drop files anywhere on the page, click to browse, or paste with Ctrl/⌘ + V.
2. Pick a quality or preset — or set an exact target size and let the tool find it.
3. Compress, compare before/after, and download — individually or as a ZIP.

## Values, not surprises

Cells export as Excel displays them: formulas become their computed values (never `=SUM(...)` text), dates keep their formatted form, and the file starts with a UTF-8 byte-order mark so Excel re-opens č, š, ž and every other accent correctly — the silent encoding bug this tool exists to avoid. Fully empty trailing rows are dropped, matching Excel’s own export.

## Delimiters and multiple sheets

Comma is the default; pick semicolon for European Excel locales (where comma is the decimal separator) or tab for TSV. Workbooks with several sheets export the first one — the row note says so explicitly, nothing disappears silently. Need the reverse trip? [CSV to XLSX](https://compress-pro.com/csv-to-xlsx) is one click away.

## Frequently asked questions

### What happens to formulas?

They export as their last computed values — exactly what the cells showed in Excel. A formula that was never calculated exports as an empty field rather than formula text.

### Why does the CSV start with an invisible character?

That is the UTF-8 byte-order mark. Excel needs it to read accented characters correctly; every other tool simply ignores it.

### My workbook has several sheets — which one converts?

The first sheet, and the result row tells you when others were present. Duplicate the workbook with the sheet you need first, or export sheet by sheet.

### Is my spreadsheet uploaded?

No. The whole conversion runs in your browser — the server only delivers this page. Financials, client lists, inventories: none of it leaves your device. Want proof? Run one file through, switch your connection off, and run another — it still works.

## Related tools

- [Convert CSV to XLSX](https://compress-pro.com/csv-to-xlsx)
- [Convert YAML to JSON](https://compress-pro.com/yaml-to-json)
- [Zip & Unzip files](https://compress-pro.com/zip-files)

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Part of [Compress Pro](https://compress-pro.com/) — every tool page has a markdown twin at `<page url>.md`. Full tool index: [llms.txt](https://compress-pro.com/llms.txt)