JSON to Excel Online
The only completely private, in-browser converter. We do not use servers to process your files. Your company's proprietary data remains on your machine.
Drag & Drop your JSON file
Secure client-side processing. Your files are never uploaded to any server.
Why Privacy Matters in Conversion Tools
Many online tools that claim to convert json to excel online actually take your `.json` file, upload it to a remote Python or PHP server, process it there, generate the `.xlsx` file, and send you a download link.
If you are working with mock datasets, this is fine. But if you are a developer or analyst exporting a production database, a user table, or financial transactions, uploading that strict PII (Personally Identifiable Information) or proprietary corporate data to a random third-party server is a gigantic security risk and often violates GDPR, HIPAA, or SOC2 compliance protocols.
How Our Browser-Based Approach Works
We engineered this JSON to Excel tool entirely differently. The website you are currently looking at is a static application. When you load the page, your browser downloads a bundle of JavaScript consisting of the mapping logic and file encoding algorithms.
- When you drag-and-drop a file, your browser reads it locally via the `FileReader` API.
- Our script parses the logic right inside your active tab's memory cache.
- We utilize open source libraries to assemble the binary Excel workbook array dynamically.
- We generate a `Blob` URL. Clicking download just saves it from your working memory to your hard drive.
Zero networks requests. Zero server logs. Zero risk.