unpkg.ai

Free

unpkg.ai generates JavaScript ES modules on demand using large language models. You describe what you need in a URL, and you get a cached .js file back. No account. No API key. Just an import statement.

You write function signatures with types right in the URL path. The service creates modules with JSDoc annotations based on your hints. It stores everything in a PostgreSQL cache with no expiration.

This sits in developer tools. It is built for JavaScript, not Python or Go. It is for quick work, not production systems you trust blindly.

Open it if you need a fast utility without npm install. Skip it if you need proven code for live users.

It fits when you want speed over setup.

• Rapid prototyping without setup: You skip the package.json dance. You get working code in a browser import.
• Learning and experimentation: You test ideas without local tooling. You see how functions behave before you build them yourself.
• Developers who want quick one-off utilities without npm install: You need a tip calculator or password generator now. You do not want to maintain it.
• Developers needing quick JavaScript modules from high-level descriptions: You describe what you want in plain language. You get an ESM module back.
• Teams automating parts of their code generation pipeline: You wire URL construction into your workflow. You review output before you ship.
• Teams evaluating AI coding assistants who want to skip account setup friction: You try the concept before you commit to paid seats.
• Developers needing quick, throwaway modules without infrastructure overhead: You generate, import, and move on. You leave no local trace.
• Developers wanting to experiment with AI-generated JavaScript modules: You test the quality of LLM code for your use case. You decide if it saves time.
• Teams with bandwidth to thoroughly vet generated code before production use: You treat the output as a starting draft. You review every line before it reaches users.

These are the parts that work.

• No signup or API keys required: You skip the token dance. You start in seconds.
• TypeScript-style type annotations in URL: You write precise hints. You get JSDoc that matches.
• PostgreSQL-based permanent caching: Your URL always returns the same module. You get CDN speed on repeat requests.
• Clever URL-based prompt syntax: You craft imports like any other package. You read your needs right in the code.

You build a URL and import it.

1. Encode your function signature and description into the URL path.
2. Append a pipe and plain English description if you need more detail.
3. Import the URL as an ES module in your project.
4. Review the generated JSDoc and implementation before you use it.
5. Cache the result yourself if you need control over updates.

Skip it when the risks outweigh the speed.

• JavaScript only: You work in Python, Rust, or Go. This gives you nothing.
• Vendor lock-in risk: You build around their URL structure. You face a rewrite to leave.
• Performance lags on complex modules: You need large modules fast. You wait longer than you save.
• No verified pricing: You cannot budget. You must check terms yourself.
• Stale module risk: Cache never expires. You may import old code without knowing.
• Production reliability unknown: You cannot verify the AI fails gracefully. You guess at error handling.