I Built a Free AI Grammar Checker That Runs Entirely in the Browser
So I built AI Grammar Checker — a single tool that does all of that in one shot, for free, with no signup. The stack is stupidly simple HTML + vanilla JS + CSS ↓ DeepSeek API (OpenAI-compatible, $0.27/million tokens) ↓ Result rendered directly in the DOM Enter fullscreen mode Exit fullscreen mode No React. The "backend" is a tiny Cloudflare Worker that proxies the DeepSeek API call so the API key stays server-side.
- ▪So I built AI Grammar Checker — a single tool that does all of that in one shot, for free, with no signup.
- ▪The stack is stupidly simple HTML + vanilla JS + CSS ↓ DeepSeek API (OpenAI-compatible, $0.27/million tokens) ↓ Result rendered directly in the DOM Enter fullscreen mode Exit fullscreen mode No React.
- ▪The "backend" is a tiny Cloudflare Worker that proxies the DeepSeek API call so the API key stays server-side.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3960002) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } dayu2333-jinyul Posted on Jun 26 I Built a Free AI Grammar Checker That Runs Entirely in the Browser #ai #tutorial #javascript #webdev I Built a Free AI Grammar Checker That Runs Entirely in the Browser A few months ago I got tired of copy-pasting my writing between five different tools — Grammarly for grammar, Hemingway for readability, some word counter for stats. So I built AI Grammar Checker — a single tool that does all of that in one shot, for free, with no signup.
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