unpkg.ai

What is unpkg.ai?

unpkg.ai is a service that creates JavaScript ES modules on demand with large language models. You build a URL whose path is a function signature, such as a currency formatter with typed parameters, import from it in your code and receive a module written to match. The site says no signup, API keys or authentication are needed, and generated modules are cached permanently and served with long cache headers. Optional query parameters let you pick a model (examples name gpt-4 and claude-3) and a seed for more repeatable output. The site calls the approach top-down vibe coding and recommends it for systems with dynamic plugins. Examples include a tip calculator with bill splitting, a password generator, a color palette generator, a Minesweeper game and a data dashboard. The site lists no pricing, and because the code is model-written you should review it before relying on it.

Use cases

• Generate a small utility function on demand
• Prototype with imagined modules
• Build dynamic plugin systems
• Try top-down coding from a signature
• Create helpers like formatters or calculators
• Generate a quick UI widget or game

Who it's for

• JavaScript developers
• Prototype builders
• Plugin system authors
• Vibe coding experimenters

Why use unpkg.ai

• You skip writing small helpers by hand: the signature is the spec and the import is the whole setup.
• No account or key is needed, so trying it takes a single URL.
• Cached modules are served instantly after the first request.
• Seed and model parameters give some control over the result.

unpkg.ai features

• Modules generated from a URL-encoded function signature
• No signup, API keys or authentication
• Model choice through a query parameter
• Seed parameter for more deterministic output
• Permanent caching of generated modules
• CDN-ready cache headers
• Health check and llms.txt endpoints
• Typed signatures for parameters, objects and return values

How to get started with unpkg.ai

1. Write the function signature you want, for example name, typed parameters and return type.
2. URL-encode it and place it in a GET request to /esm/{prompt}.js on unpkg.ai.
3. Import the function from that URL in your JavaScript code.
4. Optionally add model and seed query parameters to steer the output.
5. Review the generated code and pin or copy it before depending on it.

unpkg.ai limitations

• Output is written by an LLM, so correctness and safety are not guaranteed
• Loading generated code from a remote URL is risky in production
• The site publishes no pricing or usage limits

unpkg.ai pricing

We couldn't confirm pricing on the official site. Check unpkg.ai for current prices.

Prices can change and may vary by country or exclude tax. Check the official pricing page.

unpkg.ai alternatives

The main unpkg.ai alternatives listed on Debuly are v0, Cursor, GitHub Copilot, Lovable, Haddock and Berrry. The table compares pricing and platforms; order is A–Z.

1. 

   Berrry

   AI web app generator that turns a description into a live, hosted app with backend, login and a remixable gallery.

   CodingDeveloper platforms
   FreemiumVisit Berrry (official site)
2. 

   Cursor

   AI code editor and coding agent with cloud agents, Bugbot code review and multi-provider models, sold with Grok and X plans.

   CodingAutomation and agentsDeveloper platforms
   FreemiumVisit Cursor (official site)
3. 

   GitHub Copilot

   GitHub's AI coding assistant for code completion, chat and agents in VS Code, JetBrains, Visual Studio, the CLI and GitHub.com.

   CodingAutomation and agents
   FreemiumVisit GitHub Copilot (official site)
4. 

   Haddock

   AI script generator for Roblox, Unity, Unreal and Minecraft modding, with a free searchable library of AI-written game code.

   CodingDeveloper platforms
   FreemiumVisit Haddock (official site)
5. 

   Lovable

   AI software engineer that builds websites and web apps from a chat conversation, with hosting, a backend and code you own.

   CodingDesignAutomation and agents
   FreemiumVisit Lovable (official site)
6. 

   v0

   Vercel's AI app builder that turns prompts into Next.js and React interfaces you can edit, sync to GitHub and deploy.

   CodingDesignDeveloper platforms
   FreemiumVisit v0 (official site)

unpkg.ai FAQ

Sources & verification

Facts on this page come from the official sources below, each with the date we read it. Written by Debuly; the vendor did not review this page.

Image credits

• Logo: none collected yet, so a monogram is shown.
• Cover: none collected yet, so a generated tile is shown.

Spot an error? Report an issue with this listing. We also remove a logo or image on the owner's request.