100% Browser-Based Processing

Convert JSON ↔ Excel
Fast. Private. Powerful.

Privacy-first conversion tool with advanced flattening and multi-sheet export. All processing happens in your browser.

JSON to Excel Excel to JSON Documentation

Browser-Based Privacy

Every conversion runs locally in your browser with WebAssembly workers, so no files are uploaded or stored on our servers.

50+ Format Converters

Jump between JSON, Excel, CSV, SQL, Markdown, images, and dozens more export targets without leaving a single interface.

Multi-Sheet Export

Nested objects become additional worksheets with linked keys, giving you clean Excel files that mirror your original JSON structure.

Advanced Table Tools

Clean data inline with transpose, deduplicate, find and replace, validation guards, and instant clipboard exports.

More Excel and JSON Converters

Explore more converters for Excel and JSON formats. Transform your data between multiple formats with our professional online conversion tools.

Built for Everyone

From office users to developers, our tool adapts to your workflow

Office Users

One-click conversion with preview

No technical knowledge required

Privacy-focused processing

Analysts

Advanced flattening rules

Multi-sheet array expansion

Type inference and validation

Developers

Multiple format support

Advanced data transformation

NDJSON detection & handling

Frequently Asked Questions

Need quick answers about using JSON Excel Tool? Start with the essentials below.

Does my data ever leave the browser?

No. JSON Excel Tool processes files entirely in your browser using WebAssembly and Web Workers. We never upload or store your data on our servers.

Which formats can I convert?

You can switch between JSON, Excel, CSV, SQL, Markdown, HTML, XML, PDF, PNG, JPEG, and 40+ additional table-friendly formats with a single click.

What file sizes are supported?

Excel uploads up to about 50MB work smoothly in modern browsers. For very large datasets, start with smaller slices to keep the preview responsive.

How are nested objects handled?

Nested arrays are unpacked into extra worksheets with foreign keys, while the JSON preview lets you tweak indenting, minification, and flattening options before exporting.

How can I report a bug or request a feature?

Email support@exceltojson.online with sample data or screenshots and we will follow up as quickly as possible.

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Convert JSON ↔ ExcelFast. Private. Powerful.