ToolHub
ast, free, 100% client-side privacy developer tools
What it does
ToolHub is a collection of fast, lightweight, and 100% privacy-first utility tools for developers. Convert JSON to CSV, format SQL, encode/decode Base64, convert timestamps, and test regex—all executed directly in your browser with zero data uploaded to any server.
Format JSON, encode Base64, generate UUIDs, format SQL queries, and parse timestamps instantly. Fast, secure, zero registration required. Format, beautify, and inspect JSON with syntax highlighting and tree view. Validate JSON syntax, detect line-by-line syntax errors, and fix JSON bugs. Convert JSON array structures to downloadable CSV spreadsheet files. Encode standard text strings into Base64 format or decode Base64 back to plain text. Convert PNG, JPG, WebP, and SVG images to Base64 Data URIs for inline HTML & CSS. Test JavaScript regular expressions online with live match highlights and capture groups. Convert Unix epoch timestamps (seconds & milliseconds) to human readable dates UTC…from tool.lehuoliaoyu.com
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Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
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