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Generate Java classes from a GraphQL schema to speed up API model scaffolding.
Input
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Output
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Status
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This conversion runs on our server to use a Node-only library. Your input is processed for the request and never stored.
GraphQL to Java is a free online converter on AltFTool that generates Java classes from a GraphQL schema to speed up API model scaffolding — no signup and nothing to install.
The conversion runs on AltFTool's server: your input is sent to the AltFTool API, converted, and returned to your browser. It is not stored. GraphQL to Java is powered by the @graphql-codegen/java library, and the Java result can be copied or downloaded as graphql-to-java.java.
The input is a GraphQL schema written in SDL, not a query or a response, so paste the type definitions your server exposes.
| Input format | GraphQL |
|---|---|
| Output format | Java |
| Output file | graphql-to-java.java (text/plain) |
| Runs | On AltFTool's server — the input is sent to our API and not stored. |
| Library | @graphql-codegen/java |
| Category | GraphQL converters on AltFTool |
Open GraphQL to Java on AltFTool — the converter loads straight away, with no account.
Paste your GraphQL into the left-hand input pane, or press Sample to load a working example.
About 300ms after you stop typing, AltFTool posts your input to its conversion API and puts the Java output in the right-hand pane.
If this converter exposes options, open Settings to change them — the output re-runs as you adjust.
Copy the Java output with the Copy button, or download it as graphql-to-java.java.
Yes — this one runs on the server, because @graphql-codegen/java is a Node library rather than a browser one. Your GraphQL is sent to the AltFTool API, converted, and returned. It is not stored.
The @graphql-codegen/java library, running on AltFTool's server. The Java you see is that library's output rather than an approximation written here.
Yes. Server-side converters accept up to 200,000 characters of input per request; anything larger is rejected with a "too large" error instead of being truncated.
The result is Java. Copy it from the output pane in one click, or download it as graphql-to-java.java — AltFTool names the file after the converter and serves it as text/plain.
Yes. GraphQL to Java is free to use on AltFTool, with no account and no sign-up.
Drop the live GraphQL to Java workspace into your own docs page, tutorial or blog post with one snippet. Free, responsive, light and dark — just keep the “Widget by AltFTool” credit link visible.
<iframe src="https://www.altftool.com/embed/widget/transform/graphql-to-java"
title="GraphQL to Java Converter — free AltFTool widget"
width="100%" height="820" style="border:0;border-radius:12px;overflow:hidden"
loading="lazy" referrerpolicy="no-referrer-when-downgrade" allow="clipboard-write"></iframe>
<p style="font-size:12px;margin:4px 0 0">Widget by <a href="https://www.altftool.com/transform/graphql-to-java?utm_source=embed&utm_medium=widget" rel="nofollow">AltFTool — free online tools</a></p>More of AltFTool's GraphQL and format tooling, and the guides around it.