When you start a new RabbitMQ instance, it comes with a default user called guest and a password also called guest. This user has full access to the RabbitMQ management plugin, which is enabled by default. However, this user can only connect from localhost, which means that you cannot use it to connect to RabbitMQ from another machine.
The management UI runs on port 15672 and AMQP clients connect on 5672, see RabbitMQ ports explained for the full list.
RabbitGUI is a RabbitMQ IDE that allows you to connect to RabbitMQ instances and manage them easily. To connect to your local RabbitMQ instance with RabbitGUI, create a connexion with the following information:

You can save your connexion, and it will appear in the list of connexions. You can also add multiple connexions to different RabbitMQ instances, and they will be displayed alongside.

RabbitMQ ships with a rudimentary admin interface that you can access at http://127.0.0.1:15672 by default. You will be presented with a simple login page where you can enter the default credentials:

If you do not have a broker yet, Docker Compose is the quickest way to get guest/guest working on your machine with the management plugin enabled.
RabbitMQ tutorialWhat is AMQP? The Advanced Message Queuing Protocol explainedLearn what AMQP (Advanced Message Queuing Protocol) is, how it works, its core concepts, why it powers RabbitMQ, and how it compares to alternatives like MQTT, STOMP, and Kafka.
RabbitMQ tutorialBuilding an event bus with RabbitMQLearn how to design a decoupled event bus using a RabbitMQ topic exchange, with practical routing key conventions, durable queues, and animated diagrams showing message flow.
RabbitMQ tutorialRabbitMQ Retry Pattern: How to Retry Failed MessagesLearn how to implement message retry patterns in RabbitMQ using dead-letter queues, delayed retries with TTL, and exponential backoff strategies.Debug, monitor, and manage RabbitMQ with a modern developer interface.
Available on Windows, Mac, and Linux.

ProductHow to browse RabbitMQ messages without consuming themRabbitMQ has no read-only API to browse a queue. Learn what the management UI's "Get messages" actually does, the side effects of requeueing, and how to inspect messages safely with RabbitGUI.
ProductHow to spy on real-time queue traffic in RabbitMQ?Inspecting live messages flowing through a RabbitMQ queue is tricky because consuming is destructive. Learn how RabbitGUI creates a shadow queue to capture traffic without affecting your application.
ProductHow to predict when a RabbitMQ queue will be empty?A step-by-step explanation of how to estimate backlog drain time for a RabbitMQ queue, from naive division to linear regression with adaptive windowing.