Best 3 Vite Config Generators Compared

Vite works with no configuration at all, which is the point of it — right up until you need a path alias, a dev-server proxy so the API calls stop failing CORS, and a build target that supports an older browser.

At that point you are reading documentation for five separate options that interact, and the examples all assume you already know the shape of the file. A generator solves a narrow and real problem: producing a valid starting config with the options you actually need, correctly nested, so you can edit from something that works rather than from a blank file.

How to judge a config generator

Which frameworks? React and Vue are table stakes. Svelte, Solid, Preact and Astro separate the thorough tools from the quick ones.

Does it cover the proxy? The dev-server proxy is the single most common reason people open a Vite config, and path rewriting is where it gets fiddly.

Does it handle build and SSR modes? Library mode and SSR have their own option sets, and they are the hardest to assemble by hand.

Is the output typed? A vite.config.ts with proper typing catches mistakes in your editor rather than at build time.

The comparison

Facts checked August 2026; tools change their plans. Table covers only the 3 alternatives — our tool gets its own section below.

AI Dev Hub Vite Config Builder

The most complete. It composes a typed vite.config.ts covering framework presets, plugins, dev server options, build options and — uniquely here — SSR and library mode. Switching to SSR exposes ssr.noExternal; switching to library mode sets entry, name, fileName and formats across es, cjs, umd and iife. Those are precisely the options that are tedious to get right by hand.

Framework support spans React, Vue, Svelte, Astro, Preact, Solid and vanilla, with a sensible note that Astro manages its own Vite config through astro.config.mjs and is included as a reference target rather than a real preset. All composition happens in your browser with nothing leaving the page, free, no signup.

DevToolLab

The most practical for an ordinary app. It generates vite.config.js or .ts for React, Vue, Svelte, Preact, Solid and vanilla, with framework-specific plugin imports and the npm install commands to match — a small touch that saves the “which package was that plugin in again” detour.

Its proxy support includes optional path rewriting, which is the part people get wrong, plus path aliases defaulting to @ → ./src, CSS modules with camelCase locals, output directory, minifier choice and source maps. No registration, unlimited use, entirely in-browser. SSR and library mode are out of scope.

GenTools.io

The strongest on build-time extras. Alongside dev server settings, build target and source maps, it covers path aliases, CSS modules, compression, PWA support and chunk splitting — the last two being things people usually bolt on later after a bundle-size complaint.

It supports React, Vue, Svelte and vanilla JS/TS, which is fewer frameworks than the others, and states 100% client-side processing with no data collection and no account. If your config question is about output size rather than framework setup, this is the one that has thought about it.

Vite Config Generator

Ours builds a vite.config file with the aliases, build targets, proxy rules and environment handling a project actually needs. Environment handling is the differentiator worth naming — envPrefix, mode-specific files and which variables get exposed to client code is a genuine source of confusion, and leaking a secret because it was prefixed VITE_ is a real mistake people make.

What it does not do: SSR or library mode, or PWA and compression plugins. For a library build, AI Dev Hub’s mode switching is the better starting point. Whatever you generate, Vite’s own config reference is the authority — a generator gets you a working file, and the documentation tells you what each line means.

Which one to pick

• A library or an SSR app — AI Dev Hub.
• A standard app with an API proxy — DevToolLab, for the rewrite support.
• Bundle size, PWA or compression — GenTools.io.
• Aliases, proxy and environment variables together — the tool below.

How to do it with Vite Config Generator

1. Open the Vite Config Generator and pick your framework.
2. Add the proxy rules first if API calls are failing in dev — that is usually why you came.
3. Set aliases to match your import paths, and remember tsconfig.json needs the same paths.
4. Check which environment variables are exposed before shipping; anything prefixed for the client is public.

The walkthrough is in how to set up a Vite config without guessing. Other developer tools are in the tools directory.

You might also need

If the project is going into CI, the GitHub Actions Workflow Builder covers the build pipeline around it.

For containerising the result, the Dockerfile Builder handles the other half of the deployment setup.

Frequently asked questions

Is there a free Vite config generator that doesn’t need an account?

All four here are free with no account, and AI Dev Hub, GenTools and ours all state the configuration is composed in your browser rather than on a server.

Why do my API calls fail in dev but work in production?

Because in production your frontend and API are usually served from the same origin, and in dev they are not. The Vite dev-server proxy exists to bridge that — and if the API expects a different path than your frontend calls, you need path rewriting as well as a proxy target.

Are environment variables in Vite safe?

Only the ones you keep out of the client bundle. Vite exposes variables with the configured prefix — VITE_ by default — to browser code, which means they are public. Anything secret must never carry that prefix.

Final thought

Generate a working file, then read the documentation for the parts you kept. A generated config you do not understand is a config you cannot debug, and Vite’s options interact in ways a form cannot warn you about.

Try the free Vite Config Generator