Use Case

Diagrams from Code, Not from Markup

Mermaid and PlantUML are powerful, until your team spends more time maintaining diagram syntax than shipping features. Dockr reads your codebase and generates file diagrams, class diagrams, sequence flows, and activity maps automatically. Every commit. Zero manual upkeep.

See the Diagrams

The Problem

Why hand-written diagrams always break

Syntax drift

Someone changes a class name in the code. The Mermaid diagram still references the old name. Now your diagram lies.

Maintenance burden

A 20-file refactor means updating 12 separate diagram files. Most teams update none of them. The diagrams rot in place.

Skill gate

Only one or two people know the PlantUML syntax. When they leave, the diagram culture dies with them.

We had a beautiful architecture diagram in Confluence. It was from 2022. Since then we refactored to microservices, switched from REST to gRPC, and added a message queue. The diagram still shows a monolith with direct database calls.

- Tech Lead, 40-person fintech team

What You Get

Six diagram types, zero hand-drawing

File Diagrams

Individual file structure and relationships at a glance.

Class Diagrams

Structure, inheritance, and associations between classes.

Method Diagrams

Flow and parameter maps for every function.

Activity Diagrams

Business logic flows and decision paths.

Sequence Diagrams

Interaction traces between services and components.

Mind Maps

Conceptual relationships across the codebase (Enterprise).

How It Works

From repo to visual in four steps

Connect your repo

Link GitHub, GitLab, or Bitbucket. Public or private. One webhook. No DSL to learn, no markup files to maintain.

AI maps the structure

Dockr reads every file, class, and function. It builds a live dependency graph and generates file diagrams, class diagrams, and method flows automatically.

Visualize the flow

Sequence diagrams show how services talk to each other. Activity diagrams map business logic. Mind maps (Enterprise) connect concepts across modules.

Stay in sync forever

Every push triggers an incremental update. New classes appear. Deleted methods vanish. Changed flows get redrawn. Your diagrams match your code, always.

The Difference

Updating diagrams after a refactor

Manual workflow

Step 1

Open the Mermaid file. Realize you forgot the syntax for nested classes.

Step 2

Hunt through 14 files to understand the new dependency graph.

Step 3

Write the updated diagram markup. Preview. Fix typos. Repeat.

Step 4

Copy the rendered image into Confluence. Update the caption. Notify the team.

Result

45 minutes spent. Diagram is accurate for now. Next sprint it will be stale again.

With Dockr

Step 1

Developer pushes the refactored code.

Step 2

Webhook fires. Dockr analyzes the diff.

Step 3

New class diagrams, sequence flows, and file maps regenerate automatically.

Step 4

Team opens the portal. Updated diagrams are live. Zero human touch.

Result

Diagrams match code, always. No syntax to learn. No maintenance queue.

Questions about auto-generated diagrams

Do I need to learn Mermaid or PlantUML syntax?

No. Dockr generates diagrams from your actual source code. You never write a single line of diagram markup.

What happens when I refactor a class?

The next push triggers a regeneration. The class diagram updates automatically. Sequence and activity diagrams adjust if the flow changed.

Can I export the diagrams?

Yes. All diagrams are exportable as images. Enterprise plans also get shareable links and version history.

Which languages are supported?

11 languages: Python, JavaScript, TypeScript, Java, PHP, C, C++, C#, Go, Ruby, and Rust.

Stop drawing diagrams by hand

Book a 15-minute walkthrough. We'll connect your repo and show you every diagram type Dockr generates automatically.

Book a Walkthrough

7-day trial with 2MB upload after the demo