A few years ago, Bing had a bunch of tools for developers: base64/HTML/URL codec, ASCII table, QR code generator, color picker, formatters, even the ability to run code in the browser on the servers of an online judge (https://news.ycombinator.com/item?id=11450385)

One day they all just disappeared. I actually wasn't the only one who noticed (https://techcommunity.microsoft.com/t5/microsoft-bing/what-h...)

I think I know why: the Bing blog implies that most of it was the passion project of a couple of summer interns in 2015. Probably it simply broke at some point, and no one was around to even notice.

https://blogs.bing.com/search/2015/09/02/bing-rocks-two-new-...

https://blogs.bing.com/search/2015/10/08/bing-adds-more-tool...

Here's a larger list of Bing's search features in various domains from 2018. Most are now inactive. There apparently was a timer as well. https://old.reddit.com/r/bing/comments/9oct9o/psa_search_for...