Architecture
Sidepanel API
Renderer
React 18 / WASM
Latency
< 1ms
Permissions
Minimalist
ENGINEERED FOR EXCELLENCE
Alt DevTools isn't just another extension; it's a high-performance bridge between your source code and the browser runtime.
DOM Explorer
Traverse the element tree with real-time style modification and computed value tracking.
Network Engine
Monitor XHR and fetch requests with full header visibility and payload inspection.
Storage Manager
Live editing of LocalStorage, SessionStorage, and Cookies directly from the sidepanel.
VERIFY ACTIVATION
Purchased a Pro license? Click here to verify your key and unlock bulk generation and custom branding instantly.
WHY THE SIDEPANEL?
Traditional DevTools often require significant screen real estate or require you to toggle panels that obscure your UI. By utilizing the sidepanel, we provide a persistent, non-intrusive environment for monitoring your application state.
- Zero-click accessibility via persistent sidebar
- Integrated mobile device emulation profiles
- Performance profiling with WASM precision
- Secure bridge for cross-origin debugging
VERIFY ACTIVATION
Already have a key? Click here to verify and activate your Pro modules.
Pro Features
Sources Debugging
Full-featured editor with syntax highlighting and breakpoint management.
Device Emulation
Test responsive designs with precise viewport scaling and touch simulation.
Mocking Engine
Intercept and modify network responses on the fly for edge-case testing.