What is a DFD and how is it different from a flowchart?

A DFD (Data Flow Diagram) shows how data moves through a system - external entities, processes, data stores, and the flows between them. A flowchart shows control flow - the order of steps and decisions. Use a DFD when you care about what data goes where; use a flowchart when you care about what happens next.

What is the difference between DFD Level 0, Level 1, and Level 2?

Level 0 (the context diagram) shows the system as one process with the external entities and the data they exchange. Level 1 decomposes that single process into 3-7 sub-processes with data stores. Level 2 picks a Level 1 process and breaks it down further. State which level you need in the description and the tool will generate it.

Can I generate a DFD Level 0, then a Level 1 for the same system?

Yes. Generate the Level 0 first to confirm the boundary and the external entities. Then ask for Level 1 of the same system and the tool will keep the entities consistent and expand the single process into numbered sub-processes.

Which DFD notation does the tool use?

By default the DFD Maker uses Yourdon-DeMarco notation: circles for processes, rectangles for external entities, open rectangles for data stores, arrows for data flows. If your course or company uses Gane-Sarson (rounded rectangles for processes, two-sided open rectangles for data stores), you can switch shapes after generation.

Is this DFD maker free?

Yes, you can generate DFDs on the free tier. Paid tiers add more generations per month, larger exports, and additional formats - see the pricing page for details.

How does this differ from the Data Flow Diagram Maker?

The two share the same engine. The Data Flow Diagram Maker is the broader entry point. The DFD Maker is tuned for people who already work in DFD shorthand - Level 0, Level 1, Level 2 prompts, numbered processes, standard data store labels - and want a quicker path to a textbook-correct diagram.

Free Online DFD Maker

Draw Level 0, Level 1, and Level 2 DFDs from a short description. The AI maps external entities, processes, data stores, and data flows automatically - no manual shape work.

0 / 12,000

What is a DFD Maker?

A DFD (Data Flow Diagram) maker is a tool for drawing how data moves through a system. The Flowova DFD Maker takes a short description and produces a properly structured DFD at the level you need - Level 0 for the context view, Level 1 for the major sub-processes, or Level 2 for detailed decomposition. External entities, processes, data stores, and labeled data flows are placed and connected for you, so you can focus on the system instead of the layout.

Build a DFD in Three Steps

Describe the System and Level

Write what the system does, who interacts with it, what data moves where, and which level (0, 1, or 2) you need. Plain English is enough.

Entities and processes
Stores and flows
Pick DFD level

AI Builds the DFD

The AI identifies external entities, processes, data stores, and data flows from your description, then assembles a clean DFD at the requested level.

Level 0 / 1 / 2
Labeled flows
Standard notation

Refine and Export

Edit any element, relabel data flows, decompose a process into a Level 2 view, then export to PNG, SVG, or Mermaid for documentation.

Inline editing
Decompose process
PNG / SVG / Mermaid

DFD Maker Features

Level 0 Context Diagram

Generate a single-process Level 0 (context) DFD that shows the system boundary, external entities, and the major data flows in and out.

Level 1 Decomposition

Expand the system into 3-7 numbered sub-processes with the right data stores and flows between them - the level of DFD most teams actually deliver.

Level 2 Detail

Decompose a specific Level 1 process into a Level 2 DFD when you need to specify behavior at the implementation level.

Labeled Data Flows

Every arrow carries a label that names the data moving through it - customer details, validated order, payment token, confirmation message.

Standard DFD Notation

External entities, processes, data stores, and flows follow Yourdon-DeMarco conventions by default, with shape variants you can switch to if your team uses Gane-Sarson.

Numbered Processes and Stores

Processes are numbered (1, 1.1, 1.2 ...) and data stores follow standard D1, D2 labeling so the diagram stays traceable across levels.

Why Use This Free DFD Maker?

Skip the Manual Layout

No more dragging rectangles, snapping connectors, or aligning entities. Describe the system and get a publishable DFD instantly.

Work at the Right DFD Level

Get a context-level view for stakeholders, a Level 1 for design discussions, or a Level 2 for engineering hand-off - from the same description.

Keep DFDs Up to Date

When the system changes, edit the description and regenerate. Updating a DFD becomes minutes, not an afternoon.

Useful for Privacy and Audits

Use DFDs to show where personal data enters, where it is stored, and who it is shared with - the format auditors and DPOs expect.

Bridge Business and Engineering

DFDs show data movement without prescribing implementation, so business analysts, architects, and engineers can review the same diagram.

Export Where You Need It

Export DFDs as PNG and SVG for slides and docs, or as Mermaid to keep the diagram in version control next to the code.

Who Uses a DFD Maker?

System Analysts

Document existing systems and propose new ones

Software Engineers

Map data movement before writing code

Solution Architects

Communicate cross-system data exchange

Security and Privacy Teams

Trace personal and sensitive data for reviews

Computer Science Students

Submit textbook-correct Level 0 / 1 / 2 DFDs

Business Analysts

Capture data flows during requirements work

DFD Maker FAQ

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