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.

Latest version

Version 1.5.0

Older versions

Version 1.3.0

Version 1.0.0