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

[wu1064442747]

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

Why

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

Highlights • Privacy‑first: No uploads, no server storage—everything runs locally. • 50+ formats: JSON, Excel, CSV, SQL, Markdown, HTML, XML, PDF, PNG, JPEG, etc. • Multi‑sheet export: Nested objects/arrays become extra worksheets with foreign keys. • Advanced flattening: Tweak rules, indentation, minify/pretty‑print 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 welcome—bug reports and feature requests with sample data/screenshots help a lot: [e-mail]

[wu1064442747]

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 → multi‑sheet export, plus flattening, CSV/SQL/HTML, and 50+ formats. Free to use—feedback welcome.

[root71370]

What is a website?

[wu1064442747]

@root71370 It’s a fully client‑side data conversion site for quick, privacy‑safe 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+ formats—JSON, Excel, CSV, SQL, Markdown, HTML, XML, PDF, PNG/JPEG—handling nested data with multi‑sheet 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 [e-mail] ↗.