As web developers, our daily workflow is filled with micro-tasks: formatting a messy JSON payload, checking a Unix timestamp, decoding a Base64 string, or converting JSON arrays into a CSV sheet.
However, almost every popular tool on Google comes with two frustrating issues:
- Intrusive ads and slow page bloat.
- Data privacy risks: Many online formatters send your sensitive tokens, customer IDs, and database queries to their backend servers for parsing.
To solve this, I built ToolHub – a lightweight, fast, and 100% client-side developer utility suite.
🔒 Core Architecture: 100% In-Browser Computation
Every tool on ToolHub executes purely inside the browser sandbox using client-side JavaScript Web APIs and Web Workers:
- Zero Server Uploads: Your payload never leaves your local machine. You can even disconnect from the internet after loading the page and every tool will still work flawlessly.
- Sub-Second Static Speed: Built with Next.js 14 static generation and Tailwind CSS for instant load times.
- Dark Mode by Default: Engineered specifically for developers working in modern IDE setups.
🛠️ Current Toolbox Overview:
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JSON Utilities:
- JSON Formatter & Validator with syntax error diagnostics.
- JSON to CSV Converter with nested object flattening.
- JSON Minifier.
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Encoders & Decoders:
- Base64 Encode/Decode & Image to Base64 with live image previews.
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Code & Database Tools:
- SQL Formatter supporting standard ANSI SQL syntax.
-
Time & System Utilities:
- Unix Timestamp / Epoch Converter with UTC/Local timezones.
- UUID / GUID Generator and Regex Tester.
🚀 Try It Out & Share Your Feedback
The project is completely free with zero mandatory sign-up:
👉 Live URL: https://tool.lehuoliaoyu.com
I would love to hear your thoughts on what niche developer tools I should build next! (e.g. JWT Debugger, Cron generator, or JSON to TypeScript?)
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