JS2TS
Verified Oct 15, 2026 ActiveConverts pasted JavaScript into TypeScript with type annotations, interfaces, and generics added automatically.
Listed on EffectHub ·
Pricing
- Pricing model
- 100% Free
The tool is free with no account or payment required; the operator states conversions are unlimited.
Use tool ↗About JS2TS
JS2TS is a single-purpose browser tool: paste JavaScript code in and get back a TypeScript version with type annotations, interfaces, and generics added automatically. It's meant for developers migrating an existing codebase to TypeScript, including React components and Node.js modules, without setting up a local build pipeline just to test the conversion. There is no account, login, or credit card required, and the operator states conversions are unlimited at no cost. The site is branded under the name 011BQ with no further company details, country, or founding date disclosed.
- Platforms
- Web
- API
- Not confirmed
- Last verified
- Oct 15, 2026
Verified sources
- Describes the paste-in JS, get-out TS conversion flow and the free, no-login pricingjs2ts.com ↗
- Confirms the 011BQ branding and the absence of further company details in the footerjs2ts.com ↗
Is JS2TS legit?
We don’t label tools safe or unsafe. Below are the records we checked ourselves, each with the date we read it.
- Domain registered
- Mar 2, 2023 (3 years ago)Registry record (RDAP), registrar NameCheap, Inc., looked up Sep 6, 2026
- TLS certificate
- Issued by Google Trust Services, valid until Jan 13, 2027Seen in our own connection to the site on Oct 15, 2026
- Last checked
- Oct 15, 2026The site answered
- Operated by
- 011BQOur research, card verified Sep 1, 2026
Pros & cons of JS2TS
JS2TS does one narrow job, adding TypeScript types to pasted JavaScript, and removing login and payment friction makes it useful for a quick one-off conversion. Automatic type inference on real-world code is inherently imperfect, so the output is a starting point for a migration, not a finished, type-safe file.
Pros
- No account, login, or payment required to use it
- Handles React components and Node.js modules, not just plain scripts
- Unlimited conversions at no cost
- Fast, single-purpose interface with no unrelated features
Cons
- Automatically inferred types on complex code will need manual correction
- No company name, country, or team information is disclosed
- Pasting proprietary code into a third-party tool carries an obvious privacy tradeoff
Best for
- Developers converting a single file or small module to TypeScript
- Quick experiments before committing to a full migration tooling setup
- Anyone who wants to see roughly what typed code would look like
Not for
- Large codebases needing a project-wide, dependency-aware migration
- Teams needing guaranteed type accuracy without manual review
Watch out: Because the operator's identity isn't disclosed beyond a brand name, avoid pasting sensitive or proprietary source code into it.
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