MyMapData flow diagram for an e-commerce order processing system...
01
Set the system boundary
State what system is being described and which people or services are external to it. Choose a context or more detailed view.
Data Flow Diagram Maker
Describe your system and AI builds a structured data flow diagram — with processes, data stores, external entities, and clearly labeled data flows.
Free to startNo credit card requiredPDF, docs & images supported
mymap.ai
Free Data Flow Diagram Maker
− 100% ＋ Fit
ChatA
Ask a follow-up…
Auto⌄Claude Sonnet 5⌄
Templates made with this tool
Real prompts and the maps that came back. Open one to see the whole board and remix the prompt.
Prompts to start from
Click one to fill the box above. Edit anything before you send.
How to make a data flow diagram
No template to fill in and no drawing. You talk; the canvas keeps up.
02
List data movements
Name the processes, stores, and information flowing between them. Use data labels such as order details or stock status.
Export
PNGfree
PDFPro
Present
Share link
03
Trace inputs and outputs
Check that flows make sense at the chosen level. Ask for a missing source, destination, or process to be clarified.
What is a data flow diagram?
A data flow diagram explains how information enters a system, is transformed by processes, is stored, and leaves it. It emphasizes the movement and use of data rather than execution timing.
When a DFD is useful
Use one for requirements discussions, system documentation, or reviewing where information comes from and goes. The example shows e-commerce processes, external entities, and product and order stores using a simplified visual notation.
Rules for a coherent data flow view
- Define the boundary first. Keep external entities outside the system scope you are describing.
- Name flows as information. Labels should identify data being transferred rather than merely say next.
- Name processes as transformations. Use an action that explains what happens to the incoming data.
- Separate stores from actors. Persistent data and the people or systems exchanging it play different roles.
- Keep levels consistent. A more detailed view should account for the boundary flows shown at the broader level.
How MyMap maps information movement
MyMap arranges the entities, processes, stores, and flows from your description. Ask it to label an ambiguous arrow, narrow the system boundary, or expand a process into a separate detailed view.
Export and share
PNG and PDF
Whole map or one frame. PDF and clean PNG on Pro.
Slides
Ask for slides from this map and present frame by frame.
Share a link
A read-only link for anyone; they can copy it to their own canvas.
Keep editing
Every map stays on your canvas; come back and ask for more.
Common questions
Does a DFD show the order tasks run?
Its main purpose is to show information movement and transformation. Use a flowchart or sequence diagram when execution order is the main question.
What should I call an arrow?
Name the information, such as customer details, inventory levels, or approval result. Avoid a generic label like next that says nothing about the data.
Is the example tied to one formal notation?
It uses a simplified combination of process circles, entity rectangles, and store cylinders. Specify the notation required by your course or team and review the symbols accordingly.
Related tools & templates
Browse all templatesTemplate
Student Registration Data Flow Diagram
A data flow diagram for a student registration system — showing external entities (Student, Registrar), processes (Register, Enroll, Validate, Invoice), and data stores (Student DB, Course DB, Billing DB) with labeled data flows.
Template
E-Commerce Order Processing Data Flow Diagram
A data flow diagram for an e-commerce order processing system — showing external entities, processes, data stores, and the flow of information from browsing to shipping.
Free AI Process Flow Diagram Maker
Document any business process as a visual flow in seconds. Describe the steps, roles, and decisions and AI generates a process flow diagram — shapes, arrows, and swim lanes, all structured and clear.
Free Diagram Maker
Generate diagrams in seconds. Describe your concept, process, or system and AI creates a structured diagram — with shapes, connections, and labels — ready to refine and export.
Free AI Workflow Diagram Maker
Visualize any workflow in seconds. Describe how work moves through your team or system and AI builds a workflow diagram — steps, handoffs, decisions, and loops, all mapped and ready to share.
Free AI Cumulative Flow Diagram Maker
Generate a cumulative flow diagram in seconds. Describe your workflow and AI creates a stacked area chart showing work item progression.
Data Flow Diagram Maker
Free to start. No credit card required.
✦ Free to start · No credit card required · PDF, docs & images supported