Laravel Debugbar

Laravel Debugbar integrates the PHP Debug Bar into Laravel applications, rendering a toolbar that surfaces profiling and debugging data for each request. It registers a service provider that attaches to the response and bootstraps Laravel-specific collectors — queries with bindings and timing, routes, loaded views, fired events, mail, sessions and more — so developers can inspect what happened during a request directly in the browser. It is a development-time tool and is not meant to run on public production sites.

What You Get

• A browser toolbar showing per-request debugging and profiling data
• A query collector with SQL, bindings and execution timing
• Route, view, event, mail and session collectors tailored to Laravel
• A timeline for measuring custom application segments
• Publishable configuration to enable or disable individual collectors

Common Use Cases

• Diagnosing slow or N+1 database queries during development
• Inspecting which routes, views and events fired for a request
• Measuring timing of custom code segments with the timeline

Under The Hood

Architecture - A service provider registers the debugbar and binds it into Laravel’s request lifecycle, attaching the rendered toolbar to responses. A set of DataCollectors — query, route, view, event, mail, session and a timeline — gather per-request data, which the underlying php-debugbar front end renders as an interactive overlay. Ajax and Livewire requests are captured into a dropdown.

Tech Stack - PHP 8.2+ built on php-debugbar/php-debugbar and the Symfony bridge, integrating with illuminate routing, session and support. Front-end assets are managed via npm, with PHPUnit, Larastan/PHPStan and Laravel Pint in the dev toolchain.

Code Quality - A large, long-lived project (19k+ stars) with an active test suite (DebugbarTest, CspNonceTest and more), PHPStan strict rules and Pint formatting, reflecting strong engineering discipline.

API Design - Installation is close to zero-config: the collectors light up automatically, and configuration is a single publishable file. Helpers like debugbar()->info() and measure() make ad-hoc instrumentation easy, giving it excellent developer experience for its purpose.