{"slug": "how-i-vibe-coded-a-fast-client-side-keyword-density-analyzer-for-seo-content", "title": "How I Vibe-Coded a Fast Client-Side Keyword Density Analyzer for SEO Content", "summary": "A developer used AI-assisted coding to build a client-side Keyword Density Analyzer that runs entirely in the browser, addressing privacy concerns with third-party SEO tools. The tool leverages regex sanitization and pure helper functions to handle text parsing edge cases efficiently.", "body_md": "Hey DEV community! 👋\n\nWhen optimizing content for SEO, analyzing keyword density is a daily routine. However, sending long drafts to third-party servers raises privacy concerns, and many existing tools are overly clunky.\n\nTo solve this, I vibe-coded a lightweight **Keyword Density Analyzer** that runs **100% locally in your browser**.\n\nHandling edge cases in text parsing (like filtering stop words, punctuation, and Unicode characters) can get tedious. Prompting the AI to isolate regex sanitization into pure helper functions saved a ton of boilerplate time while keeping client-side performance lightning fast.\n\nI'd love to hear your thoughts on the UI or any additional NLP features you'd like to see!\n\n👉 **Live Demo:** [Keyword Density Analyzer](https://voviethoang.com/en/tool/keyword-density-analyzer)\n\nWhat tools or scripts do you use to analyze text performance in your workflow?", "url": "https://wpnews.pro/news/how-i-vibe-coded-a-fast-client-side-keyword-density-analyzer-for-seo-content", "canonical_source": "https://dev.to/hoangvibecode/how-i-vibe-coded-a-fast-client-side-keyword-density-analyzer-for-seo-content-1gl9", "published_at": "2026-08-21 02:18:43+00:00", "updated_at": "2026-08-21 02:44:26.907607+00:00", "lang": "en", "topics": ["developer-tools", "natural-language-processing"], "entities": ["Keyword Density Analyzer", "voviethoang.com"], "alternates": {"html": "https://wpnews.pro/news/how-i-vibe-coded-a-fast-client-side-keyword-density-analyzer-for-seo-content", "markdown": "https://wpnews.pro/news/how-i-vibe-coded-a-fast-client-side-keyword-density-analyzer-for-seo-content.md", "text": "https://wpnews.pro/news/how-i-vibe-coded-a-fast-client-side-keyword-density-analyzer-for-seo-content.txt", "jsonld": "https://wpnews.pro/news/how-i-vibe-coded-a-fast-client-side-keyword-density-analyzer-for-seo-content.jsonld"}}