Best favicon generator, by what you're building on

Lovable scaffolds a whole app in a few prompts and leaves its default icon in the tab. The tool that fits Lovable is the one that works from your live preview URL and hands back an install step the agent can run, because you never touch the file system directly.

v0 generates Next.js App Router projects, which resolve icons from files in the app directory rather than from link tags. The generator that fits v0 is the one whose export drops straight into that convention.

Bolt.new spins up a full app in an in-browser WebContainer and ships it fast, default icon and all. The generator that fits Bolt works from the preview URL and gives you a committable set before you deploy.

Cursor works over a real repository on your own machine, so unlike a hosted builder you can drop files straight in. The generator that fits is the one that produces those files plus an install step the agent runs and commits.

Replit Agent builds and hosts the app together, so you get a live URL early but edit inside Replit's own workspace. The generator that fits reads that URL and hands back files you install through the agent, not by dragging into the UI.

Next.js does not use link tags you write by hand. The App Router reads files named icon, apple-icon, and favicon from the app directory and injects the markup at build time. The right generator hands you exactly those files.

A plain React app (Vite or Create React App) has no built-in icon convention. You put files in the public folder and write the link tags in index.html yourself. The right generator hands you both, so nothing is left to guess.

Plenty of favicon tools are free. The question is what free leaves out. A generator worth using exports the whole modern set, works from a logo, image, emoji, or a live URL, and does not paywall the manifest or the larger sizes.