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UMLGen

UMLGen turns plain-English descriptions of systems into diagrams without requiring special syntax.

Place
#19 of 26
Score
5.8
UMLGen's website

What UMLGen is

UMLGen turns plain-English descriptions of systems into diagrams without requiring special syntax. Its engine parses the text, identifies relationships, and produces UML, ER, or EER notation. Supported diagram types are Use Case, Class, Sequence, Activity, Deployment, ER, and EER. You can revise a generated diagram by editing its text and regenerating it, or start a diagram from scratch in the editor. Completed diagrams can be downloaded as high-resolution PNG images. UMLGen runs in a browser on desktop, tablet, and mobile devices, with no installation, plugin, or IDE required. The site says signup is not needed. Its Free plan costs nothing and includes text-to-diagram generation, the editor, and PNG export. The core diagramming features are described as free forever, with no export limits. UMLGen names software developers, students and academics, and software architects as intended users.

Good

  • Generates diagrams from plain-English descriptions.
  • Supports seven UML, ER, and EER diagram types.
  • PNG exports have no stated limits.
  • No signup or installation is required.

Watch out

  • Exports are PNG images only, as listed.
  • The service is web-based.

Who it suits

UMLGen may suit developers, students, academics, and software architects who want to create or revise the listed diagrams in a browser. It is also useful for people who want to begin with a plain-English description rather than special notation.

Verdict

UMLGen offers a browser-based path from written system descriptions to editable diagrams and PNG exports. Its free plan may suit users whose needs fit the seven supported diagram types.

Plans and prices

From UMLGen's own pricing page, checked 8 Oct 2026.

All about pricing
PlanPriceWhat it gives you
FreeFreeText-to-diagram generation · design-from-scratch editor · PNG export · no login required

The facts

Each one read from UMLGen's own pages, with the date it was checked.

What it does

Account requirement
The site says no signup is required to use UMLGen.checked 8 Oct 2026
AI generation
Its engine parses text, identifies relationships, and renders UML, ER, or EER notation.checked 8 Oct 2026
Diagram types
It supports Use Case, Class, Sequence, Activity, Deployment, ER, and EER diagrams.checked 8 Oct 2026
Editing
Users can modify a generated diagram by editing the text and regenerating it, or create a diagram from scratch in the editor.checked 8 Oct 2026
Export
Users can download diagrams as high-resolution PNG images.checked 8 Oct 2026
Installation
The site says UMLGen requires no installation, plugin, or IDE.checked 8 Oct 2026
Intended users
The site names software developers, students and academics, and software architects as users.checked 8 Oct 2026
Text-to-diagram
UMLGen converts plain-English system descriptions into diagrams without requiring special syntax.checked 8 Oct 2026

Where it runs

Platforms
UMLGen is browser-based and the site says it works on desktop, tablet, and mobile.checked 8 Oct 2026

Money

Price
The site describes the core diagramming features as free forever, with no export limits.checked 8 Oct 2026

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