Accurate conversion
Input is processed by this tool’s dedicated converter.
Offline engine (processed locally)FLOW v1.0.0 Spec
JSON to Flow
v1.0.0Instantly create Flow type annotations from your sample JSON data. This converter analyses your JSON structure and outputs precise Flow types, helping you add static typing to JavaScript projects. Perfect for bootstrapping type coverage in existing codebases. Free, online, and requires no installation.
—ms
JSONInput (JSON)Invalid
lines: 1chars: 28Size: 28 BUTF-8
FLOWOutput (FLOW)
Auto-generated
Converted output will appear herelines: 0chars: 0Size: 0 BUTF-8
Size change: -100.00%TOML compliant: v1.0.0Tool guide
Local processing
Your input is processed in your browser and is not uploaded.
Ready-to-use output
Copy the result or save it as a file.