Flow Converter

Supported Conversions

How to Convert Flow Code

Transform your Facebook Flow type definitions to TypeScript and plain JavaScript. Here's how to use it:

1. Paste Flow Code: Enter your Flow type annotations, interfaces, or type definitions into the input field.
2. Convert: Click "Convert" to generate TypeScript and JavaScript outputs.
3. Copy Output: Use the copy button to grab the converted code for your target platform.
4. Integrate: Paste the converted TypeScript or JavaScript into your project files.

Key Features of Flow Converter

• TypeScript Conversion: Transform Flow types to TypeScript syntax and type annotations.
• JavaScript Output: Remove Flow types to generate plain JavaScript code.
• Type Annotation Support: Handle all Flow type annotations including unions, intersections, and generics.
• Interface Conversion: Convert Flow interfaces to TypeScript interfaces automatically.
• Privacy-First: All conversion happens locally in your browser.

Common Use Cases

Teams migrating from Flow to TypeScript use the converter to automate the initial type conversion. Developers moving legacy Flow codebases to TypeScript use the tool as a starting point. Open source maintainers transitioning projects from Flow to TypeScript convert type definitions. New team members unfamiliar with Flow convert code to understand it in TypeScript. Companies standardizing on TypeScript use the converter to migrate existing Flow codebases.

Tips for Best Results

• Use clean, well-formed Flow syntax for the most accurate conversion.
• Review TypeScript output for any manual adjustments needed for complex types.
• Generic types in Flow may need specific syntax adjustments in TypeScript output.
• Test converted code thoroughly - some edge cases may need manual fixes.