Bolt.new
Full-stack apps generated and run entirely in the browser.
Built on StackBlitz's in-browser Node runtime, so the generated app installs packages and runs without touching your machine. Remarkable for demos and for teaching, and you can push the result to a real repo when it outgrows the sandbox.
Best for
Zero-setup experiments — no install, no local environment.
Watch out for
Browser-based runtimes have limits. Heavier native dependencies may not work.
Using this and stuck anyway?
Knowing the tool isn't the same as finishing the project. If yours has stopped moving, we'll take a look at it.
Tell us what's broken