I use bookmarklets for a number of simple things.
My most used is to copy text where the formatting has been stripped, the bookmarklet prepends formatting instructions, and then I paste the whole thing into claude which sorts the formatting.
Me thinks I've underestimated what can be done with these.
Bookmarklets were definitely more powerful than I anticipated, but they’re tricky to version and upgrade. I’ve deployed a bookmarklet for non-technical users to some success, but I’d generally lean towards browser extensions for anything that needs to be maintained and distributed long-term.
Absolutely. If your account has access to the data, you can basically rewrite a website using a bookmarklet.
I wanted a friends feed in eBird (its social model is inscrutable) and ask Claude to make a bookmarklet that showed the most recent lists of my friends sorted chronologically. One shot and done.
Our internal corporate CRM is siloed data queries spread across overlapping views. I have a bookmarklet overlay my own interface on top and fetch data using the existing session token. (which is transparent/automatic - your browser just hangs on to the session cookies for the fetch calls)