DevScope – Developer Tools

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

DevScope is a professional browser developer tool that goes beyond standard DevTools — providing real-time structural analysis, performance profiling, and comprehensive diagnostics in a clean, dockable panel. Debugging shouldn't mean jumping between scattered panels, losing context, or running external tools. DevScope brings 16+ analysis modules into a single extension — DOM inspection, CSS analysis, performance profiling, security scanning, accessibility audits, SEO checks, network monitoring, and more — all presented in a developer-friendly interface you can resize and dock while you work. ✅ One purpose: on-demand technical inspection and diagnostics for the active webpage 🧩 16+ modules: DOM, CSS, Performance, Security, Accessibility, SEO, Network, Storage, and more 🔒 Privacy-first: 100% local, no tracking, no telemetry, no external servers --- Key Features (at a glance) * 🧩 DOM Analyzer — deep tree analysis, depth metrics, duplicate ID detection, anti-pattern hints * 🎨 CSS Inspector — computed styles, specificity conflicts, layout diagnostics, live editing * 🖱 Inspect Mode — click-to-select elements with breadcrumb navigation and highlight overlay * ⚡ Performance Profiler — Core Web Vitals, paint timing, resource breakdown, long task detection * �� Network Overview — requests by type/status, timing analysis, endpoint replay with editable params * 🔐 Security Scanner — HTTPS validation, security header audit, CSP inspection, mixed content * ♿ Accessibility Audit — WCAG checks, ARIA validation, contrast and landmark review * 🔎 SEO Analyzer — meta/Open Graph validation, structured data, heading hierarchy * 🗂 Storage Inspector — LocalStorage, SessionStorage, Cookies, IndexedDB, Cache API * 🏥 Site Health Report — prioritized diagnostics (P0/P1/P2) with DX Score (0–100) * 📦 Bundle Analysis — script/CSS/image sizes, duplicate detection * 🧠 Framework Detection — React, Vue, Angular, Svelte, jQuery, Next.js, Nuxt.js, Tailwind CSS, Bootstrap with version info --- What DevScope Helps You Do 🧩 Analyze Page Structure Understand the DOM in depth — complexity, semantic quality, and potential issues. * Deep DOM tree analysis with depth and complexity metrics * Duplicate ID detection and orphaned node identification * Inline style detection and semantic structure checks * Anti-pattern detection with actionable improvement hints --- 🎨 Inspect & Edit Styles Live Debug CSS issues in real-time without leaving DevScope. * Computed styles showing what actually applies * Specificity conflict detection * Layout diagnostics with box model insights * Live editing with instant updates and per-property reset --- ⚡ Profile Performance Identify what's slowing down the page — and where to focus. * Core Web Vitals overview at a glance * Paint and render timing signals * Resource timing breakdown by type * Long task detection and JavaScript execution metrics --- 🔐 Scan Security & Headers Check how well the page protects its visitors. * HTTPS validation and mixed content detection * Security header audit: HSTS, CSP, Permissions-Policy, X-Frame-Options * Per-header status with actionable recommendations * Security Posture Score (0–100) --- ♿ Audit Accessibility Catch accessibility issues before your users do. * WCAG compliance checks * ARIA validation * Contrast ratio analysis * Landmark structure review --- 🏥 Get a Health Report One-click prioritized diagnostics for the entire page. * P0 — Critical issues that need immediate attention * P1 — Important improvements worth addressing * P2 — Optimization opportunities for polish * DX Score (0–100) — unified technical health metric --- 📊 Export & Compare Save and share your findings in developer-friendly formats. * Export reports in JSON, CSV, or Markdown * Snapshot & comparison workflow for regression testing * Per-module export for focused analysis --- Designed for Clarity (Not Feature Bloat) DevScope packs serious diagnostic power into a focused, ergonomic interface. * ✨ Dockable layouts: Right, Bottom, and Floating modes * ⚡ Resizable interface with developer-friendly ergonomics * 🧠 Shadow DOM isolation — minimal interference with inspected pages * 🔁 Keyboard shortcut: Ctrl+Shift+D to toggle * 🌍 Available in 16 languages * 🎨 Dark / Light themes with system sync --- Privacy & Data DevScope does not: * collect personal data * track your browsing behavior * run analytics or telemetry * contact any external servers It works entirely locally in your browser. All analysis is performed on-device. User preferences are stored in `chrome.storage.local` and never leave your machine.