The Ultimate
Developer Toolkit
for Chrome
A premium, high-performance Chrome Extension built for developers, web designers, and security analysts. Debug faster, audit smarter, ship better.
Built for the Best in the Industry
Crow DevTool is designed for professionals who demand precision, speed, and security in their workflow.
Web Developers
Debug JavaScript errors, inspect network requests, and analyze DOM elements in real-time with zero overhead.
Primary UserUI/UX Designers
Inspect CSS properties, colors, margins, and paddings visually. Copy selectors and styles instantly.
Visual WorkflowSecurity Analysts
Audit security headers, detect XSS vulnerabilities, check SSL/TLS configurations, and analyze cookie flags.
Security FirstPerformance Engineers
Monitor Core Web Vitals, track memory consumption, and analyze navigation timing for optimization.
Speed MattersEverything You Need to Debug & Audit
Nine powerful modules packed into one sleek, zero-impact extension that works entirely on your local machine.
Element Inspector
Interactive element selection with hover highlights for dimensions, colors, margins (orange), and paddings (green). Smart floating copy menu with context-aware options.
Network Monitor
Real-time tracking of GET, POST, PUT, DELETE requests with color-coded status codes. Inspect headers and pretty-print JSON responses with flexible URL filters.
Error Tracker
Captures TypeErrors, SyntaxErrors, and unhandled promise rejections. Logs asset load failures with detailed stack traces and copyable error details.
Live Console
Intercepts all console outputs (log, warn, error, info, debug, table, dir) with timestamps. Toggle capture status with Pause/Resume controls.
Performance Vitals
Real-time Core Web Vitals audit: FCP, LCP, CLS, TTI. Live memory consumption graph and navigation timing breakdown (DNS, TCP, DOM, Load).
Security Insights
Automatic security grade evaluation: SSL/HTTPS, CSP, HSTS, X-Frame-Options, mixed content detection, and cookie security flags. Inline script XSS audits.
WordPress Mode
Auto-detects WordPress sites and exposes active themes, PHP version, and REST API states. Monitors admin-ajax.php and Heartbeat API logs.
Storage Inspector
Interactive management of LocalStorage, SessionStorage, and Cookies. View, search, add, edit, or delete keys. Resource summary with size tracking.
Multi-Format Export
Export diagnostic summaries as JSON, HAR, CSV, or Markdown. Beautifully structured reports with tables, headers, and formatted code blocks.
How to Use Crow DevTool
Get started in seconds. No configuration needed — just install, open, and start debugging like a pro.
Install from Chrome Web Store
Click the install button, add the extension to Chrome, and pin it to your toolbar for quick access. No account or signup required.
Open the Popup or Side Panel
Click the Crow icon in your toolbar to open the popup, or choose "Open Side Panel" from settings to dock it permanently alongside your viewport.
Activate Capture Mode
Toggle the "Capture" switch in the Network or Console tabs to start recording. All data stays local — nothing leaves your browser.
Inspect & Copy with One Click
Hover over any page element to see live metrics. Left-click to freeze and open the floating copy menu. Copy CSS selectors, HTML, or values instantly.
Export Your Analysis
When done, head to Settings and export your session data as JSON, CSV, or Markdown. Perfect for reports, documentation, or team sharing.
1. Install the extension from Chrome Web Store
2. Pin the icon to your toolbar (recommended)
3. Visit any website you want to debug
4. Click the Crow icon to open the panel
# Keyboard Shortcuts
Alt + C → Toggle Console Capture
Alt + N → Toggle Network Capture
Alt + I → Activate Element Inspector
# Pro Tips
• Use Side Panel mode for persistent debugging
• Export HAR files to share with your backend team
• Check Security Grade before every production deploy
Your Data Stays Yours
Crow DevTool is built with a privacy-first architecture. Every inspection, every log, every analysis happens locally in your browser. We don't collect, store, or transmit any of your data.
100% Local Processing
All debugging data is processed entirely within your browser. No external servers, no cloud storage, no data transmission.
Zero Data Collection
We do not collect usage statistics, error reports, or any personal information. The extension operates completely offline.
Read-Only Inspection
The extension only observes and reports. It cannot modify your website data, inject malicious scripts, or alter server responses.
Secure Export Options
Exported files (JSON, CSV, MD) are saved directly to your local downloads folder. You control where they go and who sees them.
Fully Compliant with Google Chrome Policies
Crow DevTool adheres to all Chrome Web Store Developer Program Policies and Manifest V3 requirements.
Manifest V3 Compliant
Built on the latest Chrome Extension Manifest V3 standard with modern service workers and updated permission models.
Minimal Permissions
Only requests essential permissions (activeTab, scripting, storage, cookies, webRequest, sidePanel) with clear justifications.
No Remote Code
All code is bundled locally. No remote scripts, no external dependencies, no dynamic code execution from remote sources.
Transparent Privacy Policy
Clear privacy policy explaining what data is accessed (none), how it's used (locally only), and user rights.
Single Purpose
Each permission and feature serves a single, clearly defined developer debugging purpose. No hidden functionality.
Auditable Source
Open, inspectable source code. Developers can verify every line of code that runs in their browser.
Why Crow DevTool Matters
Stop switching between tabs, tools, and consoles. One extension replaces your entire debugging stack.
Save Hours Every Week
Consolidate 5+ separate tools into one seamless interface. No more jumping between DevTools, Postman, security scanners, and performance analyzers.
Catch Issues Before Users Do
Real-time error tracking and security audits help you identify and fix problems during development, not after deployment.
Data-Driven Optimization
Core Web Vitals and performance metrics give you concrete numbers to optimize against, not guesses.
Better Team Collaboration
Export detailed reports in Markdown, JSON, or CSV formats. Share findings with designers, backend teams, and stakeholders effortlessly.
Ready to Debug Like a Pro?
Join thousands of developers who trust Crow DevTool for their daily debugging workflow. Install it free from the Chrome Web Store.
Free forever. No signup required. 100% privacy safe.
