JSON Excel Tool | Convert Excel, JSON, CSV & More

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I made a small web tool called JSON Excel Tool. It’s 100% browserbased (WebAssembly + Web Workers), so your files never leave your device. Fast, ree, and focused on practical data workflows.

Why

I often switch between JSON/Excel/CSV/SQL/HTML/Markdown and hit issues with nested structures, multisheet exports, and privacy. This tool aims to be “simple for quick tasks, powerful for complex data.”

Highlights Privacyfirst: No uploads, no server storageeverything runs locally. 50+ formats: JSON, Excel, CSV, SQL, Markdown, HTML, XML, PDF, PNG, JPEG, etc. Multisheet export: Nested objects/arrays become extra worksheets with foreign keys. Advanced flattening: Tweak rules, indentation, minify/prettyprint before export. Table tools: Transpose, deduplicate, find/replace, type inference & validation, instant clipboard copy. NDJSON support: Detects and handles JSON Lines out of the box. Performance: Smooth previews for Excel files up to ~50MB on modern browsers.

Try it Home: JSON Excel Tool JSON → Excel: JSON to Excel Excel → JSON: Excel to JSON Docs: Documentation

Feedback is welcomebug reports and feature requests with sample data/screenshots help a lot: [email protected]

JSON

EXCEL

Tool

3 条回复 2025-10-21 19:58:49 +08:00

wu1064442747

10 天前

Built a small tool for data folks: JSON Excel Tool. It’s 100% browser-based (WebAssembly + Web Workers), so files never leave your device. Handles JSON Excel with nested structures → multisheet export, plus flattening, CSV/SQL/HTML, and 50+ formats. Free to usefeedback welcome.

root71370

10 天前 via Android

What is a website?

wu1064442747

9 天前

@root71370 It’s a fully clientside data conversion site for quick, privacysafe format switching.

This is the JSON Excel Tool. Everything runs locally in your browser (WebAssembly + Web Workers), so your files never leave your device. It focuses on practical workflows across 50+ formatsJSON, Excel, CSV, SQL, Markdown, HTML, XML, PDF, PNG/JPEGhandling nested data with multisheet export, configurable flattening, and handy table utilities (transpose, dedupe, find/replace, type inference, validation, instant copy). It also supports NDJSON and smooth previews for Excel files up to ~50MB. If you have feedback or requests, email [email protected].