kitio.aiAdded Oct 28, 2026
JS2TS
FreeFree AI converter from JavaScript to TypeScript
What is JS2TS?
JS2TS converts JavaScript into TypeScript with added types, interfaces and generics. Alongside the main converter it offers JSON to TypeScript, TypeScript to Zod, OpenAPI to TypeScript and CSS to Tailwind conversions for developers.
You paste code into the converter and get typed output without installing anything. A wider set of small utilities is linked in the menu, including JSON to YAML, JWT decoding, Base64 and URL encoding, and a regex tester.
The site also hosts cheatsheets and guides on TypeScript, Zod and Tailwind, along with comparison pages. It carries a sponsor placement and invites advertisers to contact the owner.
Features
- JavaScript to TypeScript
- JSON to TypeScript
- TypeScript to Zod
- OpenAPI to TypeScript
- CSS to Tailwind
- Developer cheatsheets
Tags
Releases
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Organization
JS2TS
Listed by kitio.ai · unverified owner
Pricing
- Pricing model
- Free
- Paid options from
- 100% free
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Pros and cons
Pros
- Free and runs in the browser
- Many related converters on one site
- Includes cheatsheets and guides
Cons
- Pasting large codebases is impractical
- Site shows sponsor placements
- Generated types need human review
Prompts & results
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Q&A
What is JS2TS?
JS2TS converts JavaScript into TypeScript with added types, interfaces and generics. Alongside the main converter it offers JSON to TypeScript, TypeScript to Zod, OpenAPI to TypeScript and CSS to Tailwind conversions for developers.
Does JS2TS only convert JavaScript?
No. It also converts JSON, OpenAPI and CSS inputs into TypeScript, Zod or Tailwind.
How much does JS2TS cost?
JS2TS is 100% free.
Is there a free version of JS2TS?
Yes. JS2TS is completely free to use.
What are the main features of JS2TS?
JavaScript to TypeScript, JSON to TypeScript, TypeScript to Zod, OpenAPI to TypeScript, CSS to Tailwind, Developer cheatsheets.
Who makes JS2TS?
JS2TS is made by JS2TS.
What are the best alternatives to JS2TS?
Popular alternatives include AI SDK, Trigger.dev, DevKit.