Write your bookmarklets in val.town.

You val should export an anonymous function, containing the code that will run when the bookmarklet is triggered.

export default () => {
  alert("Hi mom!");
}

Make sure that your val is either unlisted or public, then navigate to https://pomdtr-bookmarklets.web.val.run/v/:author/:name to generate the bookmarklet link.

Make sure that your val is public, and add a #bookmarklet tag anywhere in the code.

export default () => {
  alert("Hi mom!");
}

// #bookmarklet

It should automatically appears on https://pomdtr-bookmarklets.web.val.run.

⚠️ If you are using the Arc Browser, you can use the Powerlet extension to install bookmarklets.