Bolt
Spin up web apps in the browser with StackBlitz
Category
Prompt-to-app builder
Best for
Fast prototypes and shareable demos
Pricing
Free tier, paid plans for heavier use
Bolt (from StackBlitz) is a prompt-to-app builder that runs entirely in your browser using WebContainers — a Node.js runtime that works without a server. That means projects boot almost instantly and you can preview, edit, and deploy without leaving the tab. Ask for an app, watch it build, then keep refining in chat.
Because the runtime is in-browser, Bolt is great for fast prototyping and sharing working demos. It supports popular frameworks out of the box and lets you pull in npm packages, so you can build real, non-trivial front-ends quickly. It's a favorite for hackathons and anyone who wants to see a working app in seconds.
Treat Bolt as your sketchpad: it's the quickest way to test whether an idea feels right before you commit to building it properly somewhere else.
Bolt FAQ
What makes Bolt different from Lovable or Replit?
Bolt runs the whole project in your browser using WebContainers, so apps boot in seconds with no server to provision. That makes it ideal for quick prototypes and shareable demos.
Can Bolt build back-end features?
It's strongest on front-end work, but you can connect external services and databases. For heavier back-end logic, many builders start in Bolt and move the project elsewhere.
Is Bolt free?
Yes, there's a free tier with a daily token allowance, plus paid plans for heavier use.
Weekly vibe-coding tips — coming soon
We're getting this ready. Leave your email and we'll let you know the moment it launches. No fluff, unsubscribe whenever.