zreal1/toolscart ? reverse-engineered prompt

Build me a clean, fast website called ToolScart, a collection of handy developer tools that all run right in the browser. I want it to feel simple and focused, with a homepage that makes it easy to jump into tools for things like formatting JSON, validating and minifying data, encoding and decoding Base64 and URLs, generating UUIDs and hashes, testing regular expressions, converting timestamps, making cron expressions, previewing Markdown, and generating CSS snippets like gradients, shadows, and border radius.

Keep it privacy first, so no sign in, no tracking, no cookies, no ads, and nothing sent anywhere unless it has to be. Make it mobile friendly, accessible, and consistent across every tool, with a polished but minimal design. Include basic pages like privacy, a 404 page, and SEO friendly setup with sitemap and robots. If you need anything current from online docs, look it up.