How I Vibe-Coded a Fast Client-Side Keyword Density Analyzer for SEO Content

#showdev #webdev #seo #vibecoding

Hey DEV community! 👋

When 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.

To solve this, I vibe-coded a lightweight Keyword Density Analyzer that runs 100% locally in your browser.

🛠️ Key Technical Highlights:

100% Client-Side Processing: Tokenization and term frequency calculations happen entirely in the browser using pure JavaScript. Your draft content never leaves your machine.
Instant Text Analysis: Provides real-time breakdown of 1-word, 2-word, and 3-word phrase frequencies to ensure natural content flow without keyword stuffing.
Vibe Coding Workflow: Used LLM prompts to quickly implement clean text-sanitization regex, word-stemming logic, and dynamic array sorting for frequency output.

💡 Vibe Coding Insight:

Handling 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.