Galaxy Modeler
Schema Design Tool
for GraphQL Diagrams
- All-in-One Data Toolkit Data modeling, import from files, scripts generation, documentation
- Cross Platform
Runs on Windows, macOS & Linux - Offline / Secure Your data never leaves your device
- Excellent ROI Pay once, use forever
Schema design tool for GraphQL
Galaxy Modeler is a schema design tool for GraphQL®: visual data modeling, schema diagrams and script generation in one desktop app.
Draw a schema for GraphQL from scratch and generate the SDL.
Or import an existing schema from a file or URL and get a diagram for GraphQL in seconds.
- Custom line points for clearer document references
- Orthogonal line modes
- Single file HTML report for easy sharing
- Additional assets
- Various UI enhancements
with Galaxy Modeler?
Draw diagrams for GraphQL
Schema design features include visual definition of basic and advanced GraphQL structures. Visually design GraphQL schema, specify types, interfaces, enums, draw references among types and define GraphQL type and field specifics.
Enjoy fast and convenient data modeling for GraphQL
- Create new objects visually, add references and draw implements.
- Galaxy Modeler will add referenced fields to target types automatically.
- Changes are saved immediately and in case you need to revert changes, use UNDO.
Create documentation for GraphQL schema designs
When creating schema design for GraphQL, you can arrange objects in sub-diagrams. Add notes in HTML format, connect objects using lines with custom end point graphics or add pictures to your schema designs. You can also export diagrams to PDF files or create HTML reports.
Generate schema definition scripts for GraphQL
- Use Galaxy Modeler data modeling tool for GraphQL to automatically generate schema creation scripts.
- When your schema design for GraphQL is finished, click a button on the toolbar and immediately see code preview - formatted and with syntax highlighting.
- You can also easily create custom scripts, CSV files or even UI components - it can all be done with custom templates
Turn an existing schema into a diagram for GraphQL
Import GraphQL structures from existing files or from URL and visualize specific GraphQL elements, see references and add notes or other logical information to your diagrams.
- Free 14 days trial
- No credit card required
One-Time Purchase
User-Based Perpetual Licenses
- Custom line points for clearer references
- Orthogonal line modes
- Single file HTML report for easy sharing
- Additional assets
- Various UI enhancements
- Volume discounts available
- 1 year of free upgrades + lifetime ownership
- Use on work and personal devices
What is a schema design tool for GraphQL?
A schema design tool for GraphQL is software that lets you visually create, document, and manage GraphQL schemas — types, interfaces, enums, queries, mutations, and subscriptions — without editing SDL files by hand. Galaxy Modeler lets you draw schema diagrams for GraphQL, define type relationships visually, generate schema definition scripts, and export documentation, all from a desktop application.
How do I create a diagram for a GraphQL schema?
Open the Projects page in Galaxy Modeler and click Import file to load a .graphql SDL file, or Import from URL to load the schema of a live API. Galaxy Modeler creates a project and draws the diagram automatically - types, interfaces, enums, inputs and the references between them. Pick one of three auto-layouts, color related objects, then export the diagram to PDF or an HTML report. Large schemas work too: the public GitHub schema has more than 1,000 objects. See the step-by-step guide to creating a diagram from a URL.
Can Galaxy Modeler import existing GraphQL schemas?
Yes. Galaxy Modeler can import GraphQL schemas directly from existing SDL files or from a live URL. Once imported, your schema is visualized as a diagram showing all types, their fields, and the references between them. You can then annotate, reorganize, and document the schema or continue editing it visually.
Is Galaxy Modeler a free schema design tool for GraphQL?
Galaxy Modeler offers a free 14-day trial with no credit card and no account required. After the trial, it uses a perpetual licensing model — a one-time purchase that lets you use the software forever. Optional annual renewals give access to major new versions. There is also an educational license available for teachers and students.
What GraphQL features does Galaxy Modeler support?
Galaxy Modeler supports the following GraphQL structures: object types, interfaces, unions, enums, input types, scalar types and basic support is available for queries and mutations. You can define field arguments, specify directives, draw implements and reference relationships between types, and organize complex schemas into sub-diagrams for clarity.
Does Galaxy Modeler work offline?
Yes. Galaxy Modeler is a desktop application for Windows, macOS, and Linux. It runs completely offline — no cloud sync, no account needed. Your schema designs, diagrams, and generated scripts are stored locally on your device. You can import from a URL when online, but all design work happens locally.