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.
