Gleek diagram maker – UML class, Sequence, ER diagrams, Flowcharts
Create diagrams without touching your mouse. Generate informal, class, sequence, state, gantt, user journey or entity-relationship diagrams using only the keyboard.
Gleek diagram maker – UML class, Sequence, ER diagrams, Flowcharts launched on March 4, 2021 with 56 votes, #1,273 of 3,696 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 5 years on.
In plain words
Gleek is a diagram maker tool that creates UML class diagrams, sequence diagrams, entity-relationship diagrams, and flowcharts. It is designed for developers, software architects, and technical teams who need to visualize system design and workflows. The tool allows users to generate these technical diagrams efficiently for documentation and planning purposes.
written from the facts on this page · September 2026
From the sources
A flowchart is a type of diagram that shows a step-by-step view of a process. The flowchart documents the tasks and decisions needed for the goal to be achieved. An entity-relationship diagram (ERD) is a tool used to help a developer to design databases at the conceptual level. You can use Chen or Crow’s foot notation with Gleek. Class diagrams are used in software engineering to describe the structure of a system. A class diagram uses UML to show the classes, attributes, methods, and their relationships to each other, in the system. A sequence diagram helps create an overview of how a system works and how all the different parts interact with each other over time, carry out the required…from gleek.io
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Create ER diagrams, SQL schemas, and DBML models. No Signup required, Nothing to install. All diagrams are 100% private, secure and processed locally right in your web browser
Diagram as code tool with draggable customizationsOct 2025 · github.com · ▲266In the past I've used declarative diagram generation tools like Mermaid.js a lot for quickly drawing up things but for presentations or deliverables I find that I have to then move the generated diagrams over to a tool like Lucidchart which allows full control of the organization and customization. Therefore I am now working on this to combine the benefits of both into just one tool which can do both functions. The project is certainly in the early stages but if you find yourself making architecture diagrams I'd love to hear your thoughts on the idea or even a Github issue for a feature…
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