5 free tools
TypeScript Developer Tools
Convert TypeScript into Flow, JavaScript, JSON Schema, Zod, and declaration outputs for migration and validation workflows.
What this TypeScript collection covers
- Useful for teams moving between type systems and runtime validators.
- Helps generate schema or declaration drafts from typed source.
- Speeds up TypeScript modernization and API contract work.
Common workflows
- Generate Zod or JSON Schema from TypeScript definitions.
- Convert TypeScript into JavaScript for compatibility checks.
- Create Flow or declaration outputs during migration work.
TypeScript to Flow
Convert TypeScript to Flow type annotations. Free, no signup, runs in browser. By Folioify.
TypeScript to TypeScript Declaration
Generate .d.ts declaration files from TypeScript. Free, in-browser, no signup. By Folioify.
TypeScript to JSON Schema
Generate JSON Schema from TypeScript types. Free, no signup, runs in browser. By Folioify.
TypeScript to plain JavaScript
Compile TypeScript to JavaScript online for quick previews, demos, and migration checks. Free browser-based TS to JS tool.
TypeScript to Zod Schema
Generate Zod schema from TypeScript types. Free, no signup, runs in browser. By Folioify.
Why use these TypeScript tools?
These tools focus on quick transformations and validation tasks that developers repeat during implementation, debugging, documentation, and migration work.
Are uploads required?
No. Tools run in the browser whenever possible, so code snippets stay on your device and can be copied out immediately.
TypeScript tools FAQ
Can TypeScript conversion understand runtime behavior?
No. These tools focus on source and type transformations, not runtime analysis.
Should generated schemas be reviewed?
Yes. Validate generated output against your compiler, validator, and real API samples.