DevGuard – Web Error Monitor

Captures JS, resource, and HTTP errors across websites. Filter, export, and get AI explanations via OpenRouter.

DevGuard is a modern, lightweight debugging assistant designed to help developers quickly identify, analyze, and understand website errors. It monitors JavaScript issues, resource failures, broken assets, and HTTP response errors in real time—directly from any website you browse. Whether you're a frontend developer, QA engineer, or performance tester, DevGuard gives you instant visibility into hidden issues that browsers normally suppress. DevGuard automatically captures: 🟥 JavaScript Errors Runtime exceptions Reference errors Syntax errors Unhandled promise rejections 🟧 Resource Failures Broken images Failed CSS, JS, or font files Blocked scripts Failed media loads (video/audio) 🟦 HTTP Errors 4xx client errors 5xx server errors CORS-related failures Errors from fetch() and XMLHttpRequest 🟩 Page-Level Grouping Errors are grouped by page for easier debugging when navigating across multiple URLs. 🤖 AI-Powered Error Explanations (DeepSeek via OpenRouter) DevGuard includes optional AI assistance for developers who want deeper insights. You can enable AI explanations by entering your own OpenRouter API key locally (your key stays private and is never uploaded). The built-in AI provides: Clear, simple explanations of each error Probable causes Step-by-step debugging instructions Recommended fixes Code-level suggestions Powered by: DeepSeek (via OpenRouter API) No key is included in the extension — you control your own usage. 📊 Developer-Focused Features ✔ Real-time error capture across all websites ✔ Severity scoring (Critical, Warning, Info) ✔ Color-coded error levels ✔ Page and error-type filters ✔ Export to CSV or PDF ✔ Beautiful, modern dark UI ✔ Simple, clean extension popup ✔ No backend servers — everything runs locally ✔ No tracking, no analytics, no ads 🔒 Privacy & Security DevGuard does not collect or share any personal data. All error logs are stored locally in your browser. No data is uploaded anywhere. The AI feature only activates if you provide your OpenRouter API key. Your API key is stored securely in chrome.storage.local and never leaves your device. Your browsing data stays 100% private and under your control.