FXML Editor

A developer-focused web tool to edit and validate FXML files, enabling quick formatting, error detection, and export-ready UI definitions for JavaFX projects.

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1,736+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

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About This Tool

The FXML Editor Online provides a focused environment for editing JavaFX UI definitions in XML. It supports paste or file upload, immediate syntax highlighting, and schema-based validation against common JavaFX versions. Conceptually, the tool treats FXML as a structured document and applies XML-quality rules, while exposing a deterministic formatter that standardizes indentation and attribute layout.
The tool does not execute code or render the runtime UI; instead it offers static analysis, error localization, and export-ready output. By separating concerns—structure, syntax, and formatting—developers can iterate quickly, catch problems earlier, and maintain consistent XML quality across a team.
Key differentiators include version-aware validation with embedded schemas, lightweight editing inside a browser, and an export path suitable for code reviews and CI pipelines. It is especially valuable in teams that contribute JavaFX UIs from multiple sources and require predictable, review-friendly FXML.

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How to Use

Provide inputs: paste FXML content or upload a file and select the target JavaFX version.
Choose validation options: enable schema validation or supply a custom schema.
Run analysis: trigger parsing, validation, and formatting.
Review outputs: inspect syntax highlighting, errors with line/column, and the formatted FXML.
Export: copy to clipboard or download the formatted file for integration into your project.

Frequently Asked Questions

Find Quick Answers

What is FXML?

FXML is an XML-based language used to define JavaFX user interfaces. The tool validates structure against common JavaFX schema and helps catch syntax errors early.

Can I upload files?

Yes. The editor accepts pasted content or file uploads; large files are streamed and parsed incrementally to minimize memory usage.

Does it validate against a JavaFX version?

Yes. You can select a target JavaFX version; the validator checks compatibility against the corresponding FXML schema and common UI primitives.

Can I export or download formatted code?

Yes. The tool provides a formatted FXML output and an export option to copy to clipboard or save as a file for integration into your project.

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