DevScope – Developer Tools

Advanced developer tools for analyzing, inspecting, and debugging web pages directly in your browser.

DevScope — Advanced Developer Tools for Real-World Debugging DevScope is a professional browser extension for developers and technical teams who want fast, structured insight into any webpage — without switching tools, digging through scattered panels, or losing context. It turns what you see in the browser into actionable diagnostics: structure, performance signals, network behavior, security headers, accessibility checks, and SEO structure — all presented in a clean, dockable panel you can resize and use while you work. No tracking. No telemetry. 100% local. 🛠 Designed for Professionals DevScope is built for: * Frontend developers debugging complex UI and layout issues * QA engineers validating pages quickly and consistently * Performance-focused teams investigating slow interactions * Security-minded reviews (headers, HTTPS, CSP) * Accessibility and SEO audits without external tools * Tech leads reviewing production pages and prioritizing fixes ⚡ Key Highlights * 16+ analysis modules in a single extension * Site Health Report with priority levels (P0 / P1 / P2) * DX Score (0–100) for quick technical health assessment * Dockable layouts: Right / Bottom, plus Floating modes * Resizable interface with developer-friendly ergonomics * Live inspection + real-time layout & style editing * Network request details + endpoint replay (with editable parameters) * Export reports in JSON / CSV / Markdown * Snapshot & comparison workflow for regressions * 16 supported languages * Dark / Light themes (+ system sync where enabled) * Keyboard shortcut: Ctrl+Shift+D * Shadow DOM isolation — minimal interference with inspected pages * Runs entirely offline — no data leaves your device --- 🔍 Core Modules 🧩 DOM Analyzer * Deep DOM tree analysis * DOM depth & complexity metrics * Duplicate ID detection * Orphaned / detached nodes * Inline style detection * Semantic structure checks * Anti-pattern detection with actionable hints 🎨 CSS Inspector * Computed styles (what actually applies) * Specificity conflict detection * Layout diagnostics + box model insights * Unused rule detection (heuristic) * Live editing support for rapid iteration 🖱 Inspect Mode (Live Editing) * Click-to-select elements * Breadcrumb navigation * Clear highlight overlay (margin/padding visualization) * Live layout & style editing with instant updates ⚡ Performance Profiler * Core Web Vitals overview * Paint & render timing signals * Resource timing breakdown * Long task detection * JavaScript execution metrics 🌐 Network Overview * Requests grouped by type + status (2xx / 4xx / 5xx) * Timing analysis & domain mapping * Endpoint inspection (headers / payload / response) * Request replay with editable parameters 🔐 Security Scanner * HTTPS validation * Security header audit * CSP inspection * Mixed content detection ♿ Accessibility Audit * WCAG checks * ARIA validation * Contrast and landmark structure review 🔎 SEO Analyzer * Meta + Open Graph validation * Structured data detection * H1–H6 hierarchy analysis * Indexability checks 🗂 Storage Inspector * LocalStorage / SessionStorage / Cookies * IndexedDB / Cache API * One-click clear actions 🐛 Error Tracker * Runtime errors * Console warnings/messages * Unhandled promise rejections 🧮 JS Runtime Monitor * Script/runtime insights * Memory usage signals (where available) * Event listener enumeration 📦 Bundle Analysis * Script / CSS / image sizes * Duplicate detection 🧠 Framework & Dependency Detection * React, Vue, Angular, Svelte & 50+ libraries * Version detection * Outdated dependency alerts 🏷 Heading Analysis * H1–H6 hierarchy validation * Missing / duplicate heading detection ✅ HTML Quality * Semantic checks * Deprecated tag detection * Empty container warnings * Best practices validation --- 📊 Advanced Insights 🏥 Site Health Report Automatic prioritized diagnostics: * P0 — Critical issues * P1 — Important improvements * P2 — Optimization opportunities 📈 DX Score (0–100) A unified technical score based on: * Console errors & stability signals * Network failures and slow endpoints * Performance metrics and long tasks * DOM complexity and structural quality --- 🔒 Privacy First DevScope works entirely offline. * No analytics * No telemetry * No tracking * No external servers * No data collection All analysis is performed locally in your browser. Your data never leaves your machine.