XLSX vs CSV — Comparison & Free Converter
Fast, instant XLSX to CSV conversion. No signup required. Just drop your .xlsx file and get .csv in seconds.
Batch Settings
Some metadata may not survive
Your XLSX file may contain Office XML properties metadata. CSV has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
ビジネスの現場で、あるいは趣味のデータ整理で、ExcelのXLSXファイルは広く使われています。しかし、そのデータを別のシステムで活用したい、もっと軽量な形式で扱いたい、そんな時にCSV形式が非常に便利です。特に、プログラミングやデータベース連携、あるいは大量のデータをシンプルに処理したい場面では、XLSXの持つ書式情報が時に足かせとなることも。当社の変換ツールは、複雑な設定なしに、大切なデータをXLSXからCSVへとスムーズに、そして正確に移行させます。文字化けの心配を最小限に抑えつつ、お客様のデータ活用を力強くサポートいたします。煩わしい手作業から解放され、より本質的な業務に集中するための第一歩を、ぜひここから始めてみませんか。
- 会計ソフトへのデータ移行
- 同人イベントの顧客リスト作成
- 漫画の売上データ分析
CSVファイルでは、改行コードの扱いがシステム間で異なることがありますが、日本の多くのシステムではLF（_n）が標準的です。また、縦書き文化の背景から、データ内の文字幅（全角・半角）に起因するレイアウト崩れには特に注意が必要です。
About XLSX to CSV Conversion
XLSX or CSV — which format should you use? The answer depends on your needs. Here's a quick breakdown.
XLSX is Microsoft Excel's modern format supporting formulas, charts, and multiple sheets. It has universal platform support. CSV (Comma-Separated Values) is a plain-text tabular format compatible with every spreadsheet application. It has universal platform support.
Full Name: XLSX uses Microsoft Excel Spreadsheet, while CSV uses Comma-Separated Values. Compression: XLSX uses Lossless, while CSV uses None (uncompressed). Typical File Size: XLSX uses 50 KB–50 MB, while CSV uses 1 KB–100 MB.
So when should you convert XLSX to CSV? This conversion is ideal when you You need maximum device and software compatibility. This conversion helps you convert between formats quickly.
Converting XLSX to CSV maintains high quality with CocoConvert's optimised encoder settings.
If you've decided CSV is the right choice, CocoConvert makes the conversion effortless. Upload your .xlsx file, pick CSV, and click Convert — done in seconds. The converter runs on secure servers in Germany, powered by FFmpeg, Sharp, and qpdf. Files are encrypted via TLS and erased within 24 hours.
Free tier: 5 files/hour, 250 MB each. Pro: 100 files/hour, 5 GB each. Works in every modern browser on desktop and mobile.
How to Convert XLSX to CSV
- 1
Choose your XLSX file
Upload your .xlsx file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to CSV
Select .csv from the output options. The converter applies optimal quality settings automatically.
- 3
Run the conversion
Click Convert. Server-side processing means your device stays fast — even for large spreadsheet files.
- 4
Get your CSV file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert XLSX to CSV
Your XLSX file is decoded and re-encoded as CSV.
Your XLSX file is uploaded and the format is validated
The file content is decoded into its raw representation
The data is re-encoded in CSV format with optimal settings
The converted file is ready for download
XLSX vs CSV — Detailed Comparison
| Feature | .XLSX | .CSV |
|---|---|---|
| Full Name | Microsoft Excel Spreadsheet | Comma-Separated Values |
| Compression | Lossless | None (uncompressed) |
| Typical File Size | 50 KB–50 MB | 1 KB–100 MB |
| Platform Support | Universal | Universal |
| Browser Support | none | none |
| Year Created | 2006 | 1972 |
| Open Standard | Yes | Yes |
Should You Convert XLSX to CSV?
When to Convert
- ✓You need maximum device and software compatibility
Frequently Asked Questions
Should I use XLSX or CSV?
It depends on your goal. XLSX preserves full quality. CSV preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is CSV higher quality than XLSX?
Not necessarily. Converting XLSX to CSV maintains high quality with CocoConvert's optimised encoder settings. Quality depends on the compression type and settings, not just the format name.
Can I convert XLSX to CSV on Mac and Windows?
Yes. CocoConvert is a web-based tool that works in all modern browsers — Chrome, Safari, Firefox, Edge — on any operating system including macOS, Windows, Linux, iOS, and Android.
Is CocoConvert free for XLSX to CSV?
Yes. Free users get 5 conversions per hour (250 MB each). Pro subscribers unlock 100 files per hour, 5 GB per file, and priority processing.
What tools does CocoConvert use for XLSX to CSV?
CocoConvert uses FFmpeg for audio/video, Sharp for images, and qpdf for documents — the same open-source libraries used by Netflix, YouTube, and major enterprise platforms.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.