XLS to CSV — Format Comparison & Online Converter
Fast, instant XLS to CSV conversion. No signup required. Just drop your .xls file and get .csv in seconds.
Batch Settings
Some metadata may not survive
Your XLS file may contain OLE 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.
日々の業務で、あるいは個人的なプロジェクトで、Excel（XLS形式）ファイルを扱う機会は少なくないでしょう。しかし、データをより手軽に、そして多くのシステムで利用したい場合、CSV形式への変換が非常に有効です。特に、表計算ソフトの種類を問わずデータを共有したい時や、プログラミングでのデータ処理、あるいはシンプルなテキストエディタで内容を確認したい時など、CSVは普遍的なデータ形式として重宝されます。当サイトでは、皆様の大切なデータを安全かつ迅速に、XLSからCSVへと変換するお手伝いをいたします。複雑な設定は一切不要。アップロードしていただくだけで、すぐにダウンロードが可能です。データの互換性でお困りの際は、ぜひ当サービスをご活用ください。
- 会計ソフトへのデータ連携
- 同人イベントの顧客リスト管理
- 縦書き文書作成時の元データ加工
日本のビジネスシーンでは、未だExcelのXLS形式が広く用いられていますが、システム連携やWebサービスでの利用を考えるとCSV変換は避けて通れません。特に、文字コードの指定（Shift-JISかUTF-8か）は、後のデータ処理で問題を起こさないための重要なポイントとなります。
About XLS to CSV Conversion
XLS (introduced 1987) and CSV (introduced 1972) are both spreadsheet formats, but they differ in important ways. XLS is the legacy Excel format (pre-2007) — still encountered in business workflows. CSV (Comma-Separated Values) is a plain-text tabular format compatible with every spreadsheet application.
Full Name: XLS uses Microsoft Excel Legacy, while CSV uses Comma-Separated Values. Compression: XLS uses None (uncompressed), while CSV uses None (uncompressed). Typical File Size: XLS uses 50 KB–50 MB, while CSV uses 1 KB–100 MB.
When you convert XLS to CSV, the goal is to convert between formats quickly. Converting XLS to CSV maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your XLS file is decoded and re-encoded as CSV. The conversion involves 4 steps: (1) your xls file is uploaded and the format is validated, (2) the file content is decoded into its raw representation, (3) the data is re-encoded in csv format with optimal settings, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you You need maximum device and software compatibility. For the opposite direction, CocoConvert also supports CSV to XLS conversion.
How to Convert XLS to CSV
- 1
Upload .xls file
Select your XLS file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .csv
Set CSV as the output format. The converter uses optimal settings based on the XLS→CSV conversion profile.
- 3
Convert
The server-side engine decodes your XLS file and re-encodes it as CSV. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .csv file. Multiple output files can be downloaded together.
What Happens When You Convert XLS to CSV
Your XLS file is decoded and re-encoded as CSV.
Your XLS 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
XLS vs CSV — Detailed Comparison
| Feature | .XLS | .CSV |
|---|---|---|
| Full Name | Microsoft Excel Legacy | Comma-Separated Values |
| Compression | None (uncompressed) | None (uncompressed) |
| Typical File Size | 50 KB–50 MB | 1 KB–100 MB |
| Platform Support | Universal | Universal |
| Browser Support | none | none |
| Year Created | 1987 | 1972 |
| Open Standard | No | Yes |
Should You Convert XLS to CSV?
When to Convert
- ✓You need maximum device and software compatibility
Frequently Asked Questions
What is the difference between XLS and CSV?
XLS is the legacy Excel format (pre-2007) — still encountered in business workflows. CSV (Comma-Separated Values) is a plain-text tabular format compatible with every spreadsheet application. Full Name: XLS uses Microsoft Excel Legacy, while CSV uses Comma-Separated Values. Compression: XLS uses None (uncompressed), while CSV uses None (uncompressed). Typical File Size: XLS uses 50 KB–50 MB, while CSV uses 1 KB–100 MB.
Does XLS to CSV conversion affect quality?
Converting XLS to CSV maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, XLS or CSV?
XLS uses none compression. CSV uses none compression. The better choice depends on whether you prioritize file size or quality.
How long does XLS to CSV conversion take?
Most conversions finish in seconds. Larger files or complex spreadsheet content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is XLS or CSV better for long-term storage?
CSV is better for archival since it preserves all original data.
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