If you read XKCD on an iPhone and iPad, there’s no way to see the tooltip text on the comic (usually the funniest part).

Here’s a bookmarklet to pop-up the XKCD tooltip.

javascript:{var l=document.getElementsByTagName("img");for(var i in l)if(l[i].src.indexOf("xkcd.com/comics")>0){alert(l[i].title);}}

Here’s the process for adding it your iPhone

1. Go to this blog-entry on your iPhone
2. Select and Copy the bookmarklet above
3. Go to XKCD, bookmark it, and save the bookmark
4. Edit the bookmark, change the Title to “XKCD Tooltip”
5. Paste the bookmarklet to the URL of the bookmark

To use it

1. Go to XKCD,
2. Choose the bookmarklet from your bookmarks — it will popup the tooltip