XLSB vs XLS — Comparison & Free Converter
Fast, instant XLSB to XLS conversion. No signup required. Just drop your .xlsb file and get .xls in seconds.
Batch Settings
ビジネスの現場で、あるいは個人的なデータ管理において、Excelファイルは日々の業務に欠かせないツールです。特に「XLSB」形式は、その高速性とファイルサイズの圧縮性から、大規模なデータや複雑なマクロを含むブックで重宝されています。しかし、共同作業や古いバージョンのExcelを使用している方との互換性を考えると、「XLS」形式への変換が必要となる場面も少なくありません。例えば、取引先が最新の環境ではない場合や、社内システムが特定の形式のみをサポートしている場合などです。この変換ツールは、大切なデータの内容を損なうことなく、スムーズに互換性の高いXLS形式へと移行できるよう設計されています。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、元のファイルが持つ情報や書式を可能な限り忠実に再現したXLSファイルを提供いたします。さあ、お手持ちのXLSBファイルを、より多くの環境で活用できるXLSファイルへと生まれ変わらせましょう。
- 古い会計システムへのデータインポート
- 同人誌イベントでの売上集計
- 縦書きレイアウトを含む報告書の共有
日本のビジネスシーンでは、未だに古いバージョンのExcelを使用している企業も少なくないため、互換性の高いXLS形式への変換需要は根強く存在します。特に、フォントの種類やセル内の縦書き設定が、変換後も正しく保持されるかどうかが重視される傾向にあります。
About XLSB to XLS Conversion
XLSB or XLS — which format should you use? The answer depends on your needs. Here's a quick breakdown.
XLSB is a widely used file format. It has common platform support. XLS is the legacy Excel format (pre-2007) — still encountered in business workflows. It has universal platform support.
So when should you convert XLSB to XLS? This conversion is ideal when you When you need a XLS file. This conversion helps you convert between formats quickly.
Converting XLSB to XLS maintains high quality with CocoConvert's optimised encoder settings.
If you've decided XLS is the right choice, CocoConvert makes the conversion effortless. Upload your .xlsb file, pick XLS, 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 XLSB to XLS
- 1
Choose your XLSB file
Upload your .xlsb file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to XLS
Select .xls 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 XLS file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert XLSB to XLS
Your XLSB file is decoded and re-encoded as XLS.
Your XLSB file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in XLS format
The converted file is ready for download
Format Comparison
XLSB
.xlsb file
| Extension | .xlsb |
| MIME Type | application/vnd.ms-excel.sheet.binary.macroEnabled.12 |
| Category | Spreadsheet |
XLS
.xls file
| Extension | .xls |
| MIME Type | application/vnd.ms-excel |
| Category | Spreadsheet |
Should You Convert XLSB to XLS?
When to Convert
- ✓When you need a XLS file
Frequently Asked Questions
Should I use XLSB or XLS?
It depends on your goal. XLSB preserves full quality. XLS preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is XLS higher quality than XLSB?
Not necessarily. Converting XLSB to XLS 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 XLSB to XLS 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 XLSB to XLS?
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 XLSB to XLS?
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.