Diagram templates
Every template is a piece of Mermaid code that renders as is: open one, replace the text with yours, and export PNG, Word or PowerPoint. Free, no sign-up, no watermark; rendering and export stay in your browser.
38 templates · Free · No sign-up · No watermark
Swimlane diagrams
Approval and business processes by role
Leave Approval Swimlane Diagram TemplateLeave request approval across four lanes (employee, line manager, department head, HR) with a two-level approval based on the number of days. Edit the Mermaid code to match your policy and export PNG, SVG, Word or PowerPoint for free.
Purchase Approval Swimlane Diagram TemplatePurchase approval across four lanes (requesting department, procurement, finance, general manager): request, quotes, tiered approval by amount, ordering, receiving and payment. Adapt it to your procurement policy and export PNG, Word or PowerPoint for free.
Expense Reimbursement Swimlane Diagram TemplateExpense claim process across three lanes (employee, manager, finance): collect receipts, submit, manager review, finance checks against budget and policy, payment. For finance policies and handbooks; free PNG, Word and PowerPoint export.
Order Fulfilment Swimlane Diagram TemplateE-commerce order handling across four lanes (customer, support, warehouse, logistics): order and payment, review, stock check and restocking, picking, shipping, delivery and after-sales. Free PNG, SVG, Word and PowerPoint export.
Org charts
Company, department and project team structures
Company Organisation Chart TemplateThree-level company organisation chart: a general manager, five departments (R&D, marketing, sales, finance, HR) and two teams under each. Rename the boxes for company profiles and employee handbooks and export PNG, Word or PowerPoint for free.
Engineering Department Org Chart TemplateEngineering department chart with a head of engineering, product, frontend, backend, QA and operations teams, and headcount on each role. For team introductions, hiring material and reports, exported as PNG, Word or PowerPoint for free.
Project Team Organisation Chart TemplateProject organisation chart with a sponsor, a project manager and four workstreams (analysis, development, testing, rollout and training) with their roles. For project charters, proposals and thesis reports, exported as PNG, Word or PowerPoint for free.
Sequence diagrams
Login, payment and service call interactions
User Login Authentication Sequence Diagram TemplateLogin sequence diagram with user, web app, auth service and database: submit credentials, look up the user, verify the password, return a token or 401, with alt branches and a note. For API docs and system design; free PNG, Word and PowerPoint export.
Online Payment Sequence Diagram TemplatePayment sequence diagram with user, merchant system, payment provider and bank: create the payment, checkout page, charge, synchronous result, asynchronous webhook and retry on failure. For payment integration docs; free PNG, Word and PowerPoint export.
Microservice Call Sequence Diagram TemplateOrder creation call chain across client, API gateway, order service, inventory service, message queue and notification service, with activation bars and an asynchronous event. For microservice design documents, exported as PNG, Word or PowerPoint for free.
Research roadmaps
Methodology roadmaps for proposals and theses
Thesis Research Roadmap Template (General)Research roadmap in four phases (preparation, theory and method, implementation and validation, conclusion) from problem statement to conclusions and outlook. For proposals and dissertations; free PNG, Word and PowerPoint export.
Algorithm Research Roadmap Template (Deep Learning)Five-phase roadmap for algorithm papers: problem definition, data, method, experiments and conclusion, including baseline reproduction, the proposed model, ablation studies and sensitivity analysis. Free PNG, Word and PowerPoint export.
Survey Research Roadmap TemplateFive-phase roadmap for questionnaire-based research: theory, questionnaire design, data collection, analysis and conclusion, with hypotheses, pilot study, regression and hypothesis testing. Free PNG, Word and PowerPoint export.
Software Project Roadmap Template (Capstone Projects)Five-phase roadmap for a software system project: requirements, design, implementation (frontend and backend in parallel), testing and deployment, conclusion. For final-year projects and coursework; free PNG, Word and PowerPoint export.
Gantt charts
Project, thesis and event schedules
Project Schedule Gantt Chart TemplateSoftware project schedule in four sections (requirements, design, development, testing and launch) with tasks chained by after, done and active markers and a launch milestone. Change the dates and durations and export PNG, Word or PowerPoint for free.
Thesis Timeline Gantt Chart TemplateThesis schedule in four sections (topic and proposal, research, writing, defence) with proposal and defence milestones. Change the dates for the timeline section of a research proposal and export PNG, Word or PowerPoint for free.
Product Launch Plan Gantt Chart TemplateProduct release plan in four sections (preparation, content and marketing, launch, post-launch) with feature freeze and general availability milestones and a critical staged rollout. Free PNG, Word and PowerPoint export.
Event Planning Gantt Chart TemplateEvent preparation schedule in five sections (planning, preparation, promotion, execution, wrap-up) with venue, programme and materials running in parallel and the event day as a milestone. Free PNG, Word and PowerPoint export.
Flowcharts
Sign-up, ordering, complaint and incident steps
User Registration Flowchart TemplatePhone number sign-up flowchart: check whether the number is registered, send and verify a code, lock after five failed attempts, set a password and create the account. For PRDs and project reports; free PNG, Word and PowerPoint export.
E-commerce Order Flowchart TemplateOrder flow from adding to cart to completion: stock check, stock reservation, 30-minute payment timeout, shipping and delivery, confirmation and returns. For e-commerce requirement documents and project reports, exported as PNG, Word or PowerPoint for free.
Customer Complaint Handling Flowchart TemplateComplaint handling from logging to closure: resolve on the spot or hand over, investigate, propose a solution and loop until the customer accepts, then follow up. For support handbooks and quality procedures; free PNG, Word and PowerPoint export.
Incident Response Flowchart TemplateProduction incident handling from alert to closure: severity triage (P1 / P2), escalation, root cause, rollback or mitigation, verification, incident report and retrospective. For runbooks; free PNG, Word and PowerPoint export.
Mind maps
Book notes, project plans, study plans, SWOT
Book Notes Mind Map TemplateReading notes mind map with five branches: book details, key ideas, chapter highlights, quotes and my thoughts. Fill in the title and ideas and export PNG, SVG, Word or PowerPoint for free.
Project Planning Mind Map TemplateProject planning mind map with five branches: goals, scope, milestones, resources and risks. A one-page frame for kick-off meetings and plan reviews; fill in your project and export PNG, SVG, Word or PowerPoint for free.
Study Plan Mind Map TemplateExam revision plan mind map split by subject with topics under each and a time-planning branch. Change subjects and chapters for finals, entrance exams or certifications and export PNG, SVG, Word or PowerPoint for free.
SWOT Analysis Mind Map TemplateSWOT analysis mind map with strengths, weaknesses, opportunities and threats branches and three points under each. For business plans, competitor analysis and career planning, exported as PNG, SVG, Word or PowerPoint for free.
State diagrams
Order and ticket lifecycles
Order Status State Diagram TemplateE-commerce order lifecycle as a state diagram: pending payment, paid, awaiting shipment, shipped, delivered, completed, cancelled, return in progress and refunded, with triggering events on the transitions. Free PNG, Word and PowerPoint export.
Support Ticket State Diagram TemplateTicket lifecycle as a state diagram: unassigned, in progress, on hold, awaiting confirmation, resolved and closed, with in progress expanded as a composite state. For support and IT ticketing design; free PNG, Word and PowerPoint export.
ER diagrams
Database designs for enrolment, shops and libraries
Course Enrolment System ER Diagram TemplateER diagram with five entities (student, course, enrolment, instructor, department), primary and foreign keys and one-to-many relationships. For database coursework and capstone projects; change the fields and export PNG, Word or PowerPoint for free.
E-commerce Database ER Diagram TemplateER diagram with seven entities (customer, address, order, order item, product, category, payment), one-to-many and one-to-one relationships and the main fields. For online shop projects and capstone database design; free PNG, Word and PowerPoint export.
Library Management System ER Diagram TemplateER diagram with six entities (member, book, loan, category, publisher, librarian), the loan junction entity and primary and foreign keys. A common database coursework and capstone topic, exported as PNG, Word or PowerPoint for free.
Class diagrams
Classes and relations for object-oriented design
Library Management System Class Diagram TemplateClass diagram with Member, Book, Loan and Librarian classes, their attributes, methods and associations. For object-oriented coursework and capstone projects; rename classes and methods and export PNG, Word or PowerPoint for free.
E-commerce Order System Class Diagram TemplateClass diagram with Customer, Order, OrderItem, Product and Payment classes, showing composition, associations and multiplicities. For online shop system design and object-oriented coursework, exported as PNG, Word or PowerPoint for free.
Architecture diagrams
Layered web, microservice and data platform views
Web Application Architecture Diagram TemplateFour-layer architecture of a web application with a separate frontend: clients, access layer (Nginx, API gateway), application services and data stores (MySQL, Redis, object storage). For proposals and capstone reports; free PNG, Word and PowerPoint export.
Microservices Architecture Diagram TemplateMicroservices architecture with a client, API gateway, four services, a database per service, a message queue and shared infrastructure (service registry, config server, monitoring). For architecture documents; free PNG, Word and PowerPoint export.
Data Platform Architecture Diagram TemplateFour-layer data platform architecture: sources, ingestion (CDC, logs, scheduled pulls), storage and compute (data lake, batch and streaming, warehouse) and serving (APIs, BI, model training). Free PNG, Word and PowerPoint export.
Timelines
Company history and project milestones
Company History Timeline TemplateCompany milestones by year (founding, first product, funding rounds, user milestones, new office, international expansion) as a timeline diagram. Change the years and events for company profiles and about pages and export PNG, SVG, Word or PowerPoint for free.
Project Milestones Timeline TemplateProject milestones by week grouped into four sections (kick-off, design, build, launch) with approvals, reviews, feature freeze and go-live. For status reports and steering slides, exported as PNG, SVG, Word or PowerPoint for free.
About the templates
- Are the templates free?
- Yes. Every template is free, needs no account and carries no watermark. Edit it and export PNG, SVG, PDF, Word or PowerPoint as often as you like.
- How do I put my own content in?
- Click “Open in the editor”, then double-click a node in the preview to change its text, or edit the code on the left. Each template page also has a prompt you can send to an AI assistant to generate your own version with the same structure; paste the whole reply back in.
- What if the template I need is not here?
- Start from the closest structure and adapt it, or use the prompt under “No code yet?” in the editor to have an AI generate one. Anything Mermaid supports renders here, not only the templates listed.