Tips

• The Quick panels write the script for you: copy a piece of text, fire a fetch (handy for replaying a GraphQL call), or jump to a path on the current host.
• Pasting into the address bar strips the leading javascript: — retype it by hand when testing there. In a bookmark it is kept.
• Paste an existing bookmarklet URL into the bottom box to decode it back to readable source.
• Save script stores it against your account rather than this browser, so your scripts follow you to any device. It needs a signed-in session; the encoder itself does not. Keep credentials out of saved scripts.
• Export all downloads every saved script as one JSON file, and Import… restores it — on this account or another one. An import that would replace scripts you already have names them and asks first; cancelling still brings in the new ones.
• Loading a saved script replaces the editor. If what is in there is not saved, you are asked before anything is lost — so Save script first if you want to keep both.
• Comments are stripped when you Encode, unless you tick Keep comments. Either way a // comment cannot survive as-is: a bookmarklet is one line, so it would swallow the rest of the script — keeping them rewrites each one to /* … */, which has an explicit end.
• Hit Example and click any highlighted Load … example — the sample is loaded and encoded in one step, so the bookmarklet URL is ready to copy.