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100% Browser-Based Processing
Privacy-first conversion tool with advanced flattening and multi-sheet export. All processing happens in your browser.
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
One-click conversion with preview
No technical knowledge required
Privacy-focused processing
Advanced flattening rules
Multi-sheet array expansion
Type inference and validation
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 [email protected] with sample data or screenshots and we will follow up as quickly as possible.
