How to add subscript and superscript in WordPress page titles

You can use markup in titles. H<sub>2</sub>O will work just fine. I would use H₂O with a real ₂ because markup will be stripped in title attributes and in feeds.

Note that WordPress will not create a pretty permalink for the correct character. The slug for my example will look like this: h2o-h%e2%82%82o.
You need my plugin Germanix URL to get h2o for both variants.

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