AI Diagram Generator for Software Engineers

Your architecture changes. Your diagrams should too.

The AI diagram generator for software engineers — BPMN, C4, UML, cloud architecture, ERD, and 14 more diagram types. Fully editable, not locked images. flow-chart.io turns ideas, prompts, documents, and conversations into polished, presentation-ready diagrams — architecture maps, process flows, technical illustrations, and editable graphics.

Describe a system, process, or threat model. flow-chart.io generates a polished, domain-aware diagram as a live scene graph — every node, connector, label, and lane is editable. Not another locked AI image. Then refine by chatting, track versions, or rescan a GitHub repo when the system changes.

Your diagram is no longer a one-shot output.

Conversational refinement — chat with the diagram to add, remove, rename, regroup, or restyle elements without starting over.
Version history — browse earlier drafts, see what changed, and restore the version that tells the story best.
GitHub scanning — connect a repository and scan the codebase to ground your diagram in the system you actually run.

One prompt gets you started. A living, editable diagram gets you to the finish line.

Every kind of professional diagram.

flow-chart.io covers 17 diagram domains — business process, IT and systems architecture, cloud architecture, DevOps, security, data, AI/ML, network, org, finance, product, and more. Each domain includes a built-in knowledge panel, notation enforcement, and a standards audit pass before delivery.

From rough idea to shareable diagram in five steps.

Enhance — start with a sentence, document, conversation, or repo. flow-chart.io turns rough input into a stronger diagram brief.
Generate — get a polished diagram grounded in your selected domain and notation.
Refine — chat with the diagram to add, remove, rename, regroup, or restyle elements.
Review — browse versions, compare changes, and restore the right draft.
Share — export to SVG, PNG, PDF, Mermaid, or re-importable JSON.

Start free. Upgrade when you need more.

Free plan includes AI credits/month, all 17 domains, and all export formats. No credit card required.

Free: AI credits/month
Pro: $19/month (or $15/mo billed annually) — 200 AI credits/month
Team: $29/seat/month — 600 pooled credits (sales-assisted)
Need more? Top up anytime in $10 packs (100 credits each)

AI that knows the standards, not just the shapes.

Supported standards include BPMN 2.0, C4 model, ArchiMate, UML deployment, STRIDE, MITRE ATT&CK, NIST CSF, NIST 800-207 (zero-trust), OWASP, AWS Well-Architected, Azure CAF, GCP Architecture Framework, GitOps, DORA metrics, Medallion architecture, SOX controls, SIPOC, RACI, and value stream mapping. After generation, an AI audit advisor checks the diagram against the relevant standards for its domain and surfaces violations as actionable suggestions — for example, "this BPMN gateway has unlabeled exits" or "this C4 container diagram is missing a trust boundary." Pro and Team plans include the full audit suite.

What you get with flow-chart.io vs. other AI tools.

Feature	flow-chart.io	Other AI diagram tools
Output format	Fully editable diagram (real editable elements)	Raster image or text string
Edit after generation	Every node and connector	Start over or use separate editor
Conversational refinement	Chat to edit — no starting over	Not offered
Version history	Browse, compare, restore any draft	Not offered
GitHub integration	Scan a repo, generate from codebase	Not offered
Standards compliance	17 domains, 20+ standards audited	Best-effort, no audit
Export to Mermaid	Yes	Not offered
Export to SVG/PDF	Yes	Varies
Image-to-editable	Yes	Not offered
Free tier	AI credits/month	Varies

Frequently asked questions

Is flow-chart.io free to use?: Yes. The free plan includes AI credits/month (~5 standard diagrams), up to 3 saved projects — no credit card required.
What makes flow-chart.io different from other AI diagram tools?: Most AI diagram tools generate a raster image you cannot edit. flow-chart.io generates a fully editable scene graph — every node, connector, lane, and label is a typed object you can move, restyle, and reconnect without starting over.
Does flow-chart.io support BPMN 2.0?: Yes. The business process domain generates proper BPMN 2.0 elements — pools, lanes, tasks, gateways (exclusive, parallel, inclusive), and message flows — and includes a built-in standards audit that checks compliance before delivery.
Can I generate C4 model diagrams with AI?: Yes. The IT & systems architecture domain supports the C4 model across Context, Container, and Component levels. Each level generates appropriate abstractions: Person and System nodes at Context, Container nodes with technology labels at Container level, and Component nodes at the deeper level.
What export formats are supported?: All diagrams export to SVG (vector, scalable), PNG (2× and 4× pixel density), PDF (print-ready), JSON (canonical scene graph, re-importable), and Mermaid (.mmd format). Exports are derived directly from the scene graph — not screen captures.
Can I upload an existing diagram and make it editable?: Yes. The image-to-diagram feature accepts photos of whiteboards, screenshots of legacy tools, or scanned PDFs. The AI re-interprets the image as a fully editable EDOM scene graph — not a traced image.
What AI standards does flow-chart.io support?: Supported standards include BPMN 2.0, C4 model, ArchiMate, UML deployment, STRIDE, MITRE ATT&CK, NIST CSF, NIST 800-207 (zero-trust), OWASP, AWS Well-Architected, Azure CAF, GCP Architecture Framework, GitOps, DORA metrics, Medallion architecture, SOX controls, SIPOC, RACI, and value stream mapping.
How does the standards audit work?: After generation, an AI audit advisor checks the diagram against the relevant standards for its domain and surfaces violations as actionable suggestions — for example, "this BPMN gateway has unlabeled exits" or "this C4 container diagram is missing a trust boundary." Pro and Team plans include the full audit suite.