Free Mermaid Diagram Templates
52 ready-to-use templates. Search, filter, and open in the editor.
Showing 52 of 52 templates
User Authentication Flow
Sequence diagram showing OAuth 2.0 login flow with JWT token exchange between client, auth server, and resource API.
sequence
Microservices API Gateway
Flowchart of an API gateway routing requests to microservices with auth, rate limiting, and load balancing.
flowchart
CI/CD Deployment Pipeline
Flowchart showing a complete CI/CD pipeline from code push through testing, staging, and production deployment.
flowchart
Event-Driven Architecture
Sequence diagram of an event-driven system with message queue, producers, consumers, and dead letter handling.
sequence
Real-Time Chat with WebSockets
Sequence diagram showing WebSocket connection lifecycle for a real-time chat application with presence tracking.
sequence
Serverless Image Processing Pipeline
Flowchart of a serverless image upload and processing pipeline with S3, Lambda, and CDN delivery.
flowchart
Load Balancer with Health Checks
Flowchart showing a load-balanced web architecture with health checks, auto-scaling, and failover routing.
flowchart
E-Commerce Database Schema
ER diagram of a complete e-commerce database with users, products, orders, payments, and reviews.
er-diagram
SaaS Multi-Tenant Schema
ER diagram for a multi-tenant SaaS application with organizations, members, roles, and subscription billing.
er-diagram
Social Media Data Model
ER diagram for a social media platform with users, posts, comments, likes, follows, and notifications.
er-diagram
Observer Design Pattern
Class diagram showing the Observer pattern with EventEmitter, subscribers, and typed event handling.
class-diagram
CMS Content Model
ER diagram for a headless CMS with pages, blocks, media, and versioned content publishing workflow.
er-diagram
Role-Based Access Control (RBAC)
Class diagram for an RBAC system with users, roles, permissions, and resource-level access policies.
class-diagram
Inventory Management Schema
ER diagram for warehouse inventory tracking with products, warehouses, stock levels, and transfer orders.
er-diagram
Software Release Plan
Gantt chart for a full software release cycle with planning, development, QA, and launch phases.
gantt
Product Roadmap Timeline
Timeline diagram showing a quarterly product roadmap with milestones across Q1 through Q4.
timeline
Agile Sprint Board
Kanban board showing an agile sprint with backlog, in-progress, review, and done columns.
kanban
Website Redesign Project
Gantt chart for a website redesign project covering discovery, design, development, and launch phases.
gantt
Startup Launch Timeline
Timeline diagram for launching a SaaS startup from idea validation through public launch and first revenue.
timeline
Feature Development Kanban
Kanban board for tracking features across ideation, design, development, testing, and shipped stages.
kanban
Marketing Campaign Plan
Gantt chart for a multi-channel marketing campaign with content creation, social media, and paid ads.
gantt
Customer Onboarding Journey
User journey map showing the customer onboarding experience from signup through activation and first value.
user-journey
Order Fulfillment Process
Flowchart showing e-commerce order fulfillment from placement through payment, picking, shipping, and delivery.
flowchart
Employee Hiring Pipeline
State diagram showing the hiring pipeline stages from application through interviews, offer, and onboarding.
state-diagram
Support Ticket Workflow
State diagram for a customer support ticket lifecycle from creation through triage, resolution, and closure.
state-diagram
Content Publishing Workflow
Flowchart of a content publishing process from ideation through writing, editing, approval, and distribution.
flowchart
Purchase Approval Process
Flowchart for a multi-level purchase approval process with budget thresholds and sign-off requirements.
flowchart
Customer Support Experience
User journey map showing the customer support experience from issue discovery through resolution and follow-up.
user-journey
REST API Architecture
Flowchart documenting a REST API architecture with middleware layers, controllers, services, and data access.
flowchart
Git Branching Strategy
Flowchart documenting a Git branching strategy with main, develop, feature, release, and hotfix branches.
flowchart
System Component Overview
Block diagram showing a system architecture with frontend, backend, infrastructure, and third-party services.
block
Application State Machine
State diagram documenting a web application's state machine with loading, authenticated, and error states.
state-diagram
Technology Stack Overview
Mind map documenting a full-stack technology stack with frontend, backend, DevOps, and monitoring layers.
mindmap
Error Handling Strategy
Flowchart documenting an application's error handling strategy with retry logic, fallbacks, and alerting.
flowchart
Data Flow Architecture
Flowchart documenting how data flows through a system from ingestion through processing, storage, and serving.
flowchart
API Versioning Class Model
Class diagram documenting an API versioning strategy with versioned controllers, DTOs, and migration utilities.
class-diagram
ML Training Pipeline
End-to-end machine learning pipeline from raw data ingestion through feature engineering, model training, evaluation, and deployment.
flowchart
RAG Application Architecture
Retrieval-Augmented Generation architecture showing document ingestion, vector storage, semantic search, and LLM response generation.
flowchart
AI Agent Tool-Calling Loop
Sequence diagram of an AI agent processing a request through planning, tool selection, execution, and iterative refinement.
sequence
ETL Data Pipeline
Extract-Transform-Load pipeline showing data flow from multiple sources through transformation stages into a data warehouse.
flowchart
LLM Cost Breakdown
Pie chart showing the distribution of LLM API costs across different models and usage categories in a typical AI application.
pie
Model Performance Comparison
XY chart comparing model accuracy across training epochs, useful for visualizing training progress and comparing model variants.
xychart
Real-Time Data Streaming
Sankey diagram showing data volume flowing through a real-time streaming pipeline from producers through processing to consumers.
sankey
SSO Identity Provider Flow
Sequence diagram showing SAML/OIDC single sign-on flow between a service provider, identity provider, and user directory.
sequence
Kubernetes Deployment Architecture
Architecture diagram showing a Kubernetes cluster with ingress, services, pods, and persistent storage.
architecture
SaaS Platform Schema (Modern Auth)
ER diagram for a modern SaaS platform with external auth provider integration, team workspaces, role-based access, and usage-based billing.
er-diagram
Feature Prioritization Matrix
Quadrant chart plotting features by business impact versus implementation effort to guide product roadmap decisions.
quadrant
Conversion Funnel Analytics
Sankey diagram visualizing user flow through a SaaS conversion funnel from landing page through signup, activation, and subscription.
sankey
Decision Tree Logic
Flowchart showing a branching decision tree for customer routing, support triage, or recommendation logic.
flowchart
Git Feature Branch Workflow
Git graph showing a feature branch workflow with parallel development, code review, and release tagging.
gitgraph
Cloud Infrastructure Overview
C4 container diagram showing a cloud-native application with web frontend, API services, databases, and external integrations.
c4
Network Packet Structure
Packet diagram showing the byte-level structure of a TCP/IP packet with header fields and payload.
packet