# Debug

> Debug toolbar and debugger panels for Yii2 covering requests, logs, queries, profiling, timeline, queue, mail, events, asset bundles and user switching\.

- Package: yii2\-extensions/debug
- Collection: Yii2 Extensions
- Topic: Quality and debugging
- Tags: debug, debug-toolbar, profiling, database-profiling, request-inspector, timeline
- Kind: tool
- Relationship: Site curator ([evidence](<https://github.com/yii2-extensions/debug/blob/d1b208afa729a26cb2aeb742710e13f277cac099/composer.json>))
- Maintainer: [@terabytesoftw](<https://github.com/terabytesoftw>)
- PHP requirement: &gt;=8\.3
- License: BSD\-3\-Clause
- Install: `composer require yii2-extensions/debug`
- Packagist: 136 installs in the last 30 days, 5,516 in total, 4 favourites (as of 2026-10-25). Installs count Composer downloads, not users.
- On this site: guide, API reference, agent skill

## Documentation on this site

- [Overview](</docs/extensions/debug/index.md>)
- [Installation](</docs/extensions/debug/installation/index.md>)
- [Configuration reference](</docs/extensions/debug/configuration/index.md>)
- [Usage examples](</docs/extensions/debug/examples/index.md>)
- [Migrate to Debug 0\.2](</docs/extensions/debug/migration/index.md>)
- [AI assistance](</docs/extensions/debug/agents/index.md>)
- [Testing](</docs/extensions/debug/testing/index.md>)
- [Screenshots](</docs/extensions/debug/screenshots/index.md>)
- [API reference](</docs/extensions/debug/reference/index.md>)
- [Agent skill yii2\-debug\-inspection](</docs/skills/yii2-debug-inspection/SKILL.md>)

## Compatibility

- Yii2: ^22\.0@dev ([composer\.json at this commit](<https://github.com/yii2-extensions/debug/blob/d1b208afa729a26cb2aeb742710e13f277cac099/composer.json>))

Requirements are recorded from the linked source revision. A catalog listing does not verify an application's dependency resolution or runtime behavior.

## Source and version

- Release reference: [d1b208afa729a26cb2aeb742710e13f277cac099](<https://github.com/yii2-extensions/debug/blob/d1b208afa729a26cb2aeb742710e13f277cac099/composer.json>)
- Reference inspected: 0\.2\.2
- Metadata reviewed: 2026-10-25

The recorded release reference is scoped to this revision; it is not a claim that this is the newest release.

## Links

- [Documentation](</docs/extensions/debug/index.md>)
- [Repository](<https://github.com/yii2-extensions/debug>)
- [Package catalog](</docs/packages/index.md>)