Login Sequence Diagram
M
MermaidMap every step of user authentication. This template shows the back-and-forth between a user, your login interface, validation logic, and database — making it clear where credentials are checked, how responses flow back, and what happens after successful authentication. It's a straightforward way to document login flows, debug authentication issues, or explain security processes to your team without getting lost in technical specs.
How to create a Login Sequence Diagram
To create a login sequence diagram, follow these steps:
01.
Identify actors
Define who or what participates in the login process (e.g., user, login page, authentication service, database).
02.
Determine system boundaries
Clearly specify what's inside your authentication flow and what external systems are involved (e.g., third-party auth providers, session managers).
03.
List interactions
Identify the main messages exchanged between actors (e.g., "click login," "validate credentials," "return user data").
04.
Create lifelines
Draw vertical dashed lines representing each actor and system component throughout the sequence.
05.
Add messages
Use arrows to represent the flow of requests and responses between lifelines, labeling them with specific actions.
06.
Order events
Place messages in chronological sequence from top to bottom, showing the exact order of authentication steps. Add branches (optional): Wrong password, locked account, MFA required, rate-limit, password reset.
07.
Review & share
Walk through with your team to confirm the happy path and edge cases.
You might also like
View all View all templatesProject Timeline Gantt Chart
Track project tasks, dependencies, and timelines in one visual schedule. This template shows what needs to happen when, helping teams coordinate work, spot scheduling conflicts, and keep stakeholders informed on progress. Essential for project planning, resource allocation, sprint planning, or communicating delivery timelines to clients.
M
Mermaid
Business Planning Mind Map
Organize every piece of your business strategy in one visual space. This template breaks down business planning into clear branches — from company profile and financials to market analysis and competitive positioning — making it easier to see how different aspects of your business connect. It’s a quick way to align stakeholders, prepare for investor meetings, or align your team around priorities.
M
Mermaid
Entity Relationship Diagram
Visualize how your database pieces fit together. This template maps the relationships between different data entities — showing what information each table holds, how tables connect to each other, and the type of relationships that exist. It's essential for anyone building or documenting databases, helping developers understand data structure, identifying missing connections, or planning migrations.
M
Mermaid
System Architecture Block Diagram
Build high-level system layouts showing how components connect and interact. This template uses blocks and arrows to represent databases, services, modules, and their relationships — making complex architectures digestible at a glance. Ideal for technical documentation, architecture reviews, onboarding engineers, or planning system integrations.
M