XLS Won't Open? Convert to JSON Instantly
Fast, instant XLS to JSON conversion. No signup required. Just drop your .xls file and get .json in seconds.
Batch Settings
Some metadata may not survive
Your XLS file may contain OLE properties metadata. JSON has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
表計算ソフトのデータ、特に日本で広く使われるXLS形式は、そのままだと他のシステムやウェブサービスでの利用が難しいことがありますね。そんな時、構造化されたデータ形式であるJSONに変換することで、活用の幅が格段に広がります。当社のXLSからJSONへの変換ツールは、複雑な設定なしに、大切なデータを瞬時に、そして正確に変換できるよう設計されています。ビジネス文書から個人の記録まで、XLSデータをより柔軟に扱いたいとお考えの方に、このページがお役に立てれば幸いです。データの可能性を最大限に引き出し、新たな価値創造の一助となればこれほど嬉しいことはありません。
- 漫画・アニメ関連データの管理
- ビジネスレポートのシステム連携
- 縦書きテキストデータの構造化
日本のビジネスシーンでは未だXLS形式が根強く利用されており、これを現代的なウェブサービスやデータベースと連携させる際に、JSON変換が非常に有効な手段となります。特に、縦書きの住所録や名簿なども、適切に変換することでデジタル活用が容易になります。
About XLS to JSON Conversion
Dealing with a XLS file that won't open on your device? You're not alone — XLS compatibility issues are one of the most common reasons people search for a file converter. XLS is the legacy Excel format (pre-2007) — still encountered in business workflows.
The fix is simple: convert your XLS to JSON. JSON (JavaScript Object Notation) is the universal data interchange format for APIs and configuration. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Full Name: XLS uses Microsoft Excel Legacy, while JSON uses JavaScript Object Notation. Compression: XLS uses None (uncompressed), while JSON uses None (uncompressed). Typical File Size: XLS uses 50 KB–50 MB, while JSON uses 1 KB–100 MB. Converting XLS to JSON maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your XLS file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
This conversion is ideal when you You need a file that works in web browsers, or when you You need maximum device and software compatibility.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert XLS to JSON
- 1
Add your XLS file
Drag and drop your .xls file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick JSON output
Select .json as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The spreadsheet engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .json file. For batch jobs, download all at once as a zip.
What Happens When You Convert XLS to JSON
Your XLS file is decoded and re-encoded as JSON.
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 JSON format with optimal settings
The converted file is ready for download
XLS vs JSON — Detailed Comparison
| Feature | .XLS | .JSON |
|---|---|---|
| Full Name | Microsoft Excel Legacy | JavaScript Object Notation |
| Compression | None (uncompressed) | None (uncompressed) |
| Typical File Size | 50 KB–50 MB | 1 KB–100 MB |
| Platform Support | Universal | Universal |
| Browser Support | none | Universal |
| Year Created | 1987 | 2001 |
| Open Standard | No | Yes |
Should You Convert XLS to JSON?
When to Convert
- ✓You need just the audio track from a video recording
- ✓You're creating a podcast or audio file from video content
- ✓You need a file that works in web browsers
- ✓You need maximum device and software compatibility
Frequently Asked Questions
Why won't my XLS file open?
XLS files may not open if your device lacks the right codec or application. Converting to JSON — a more widely supported format — usually resolves this. JSON (JavaScript Object Notation) is the universal data interchange format for APIs and configuration.
Is it safe to convert XLS to JSON online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting XLS to JSON?
Converting XLS to JSON maintains high quality with CocoConvert's optimised encoder settings. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my XLS file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert XLS to JSON on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.