How to hide the .html extension with Apache mod_rewrite

Question

I have a small number of static sites where I simply want to hide the .html extension:

• the url /foo fetches the static file /foo.html
• the browser still displays the url /foo

The client can then send out bookmarks in the style mydomain.com/foo rather than mydomain.com/foo.html.

It sounds very simple, and I've used mod_rewrite happily before (say with WordPress or for redirects), but this is proving much harder to crack that I thought. Perhaps I'm missing something really obvious, but I can't find a solution anywhere and I've been at it all day!

We run our own server, so this can go wherever is the best place.

Addendum

The solution checked below worked fine. Then after running the site awhile I noticed two problems:

1. all pages began to appear unstyled. I reloaded, cleared the cache, etc., but still no-style. I've had this trouble before, and can't locate the source.

2. There's a directory AND an html file named 'gallery', so the /gallery link shows a directory listing instead of the html file. I should be able to sort that one, but further tips welcome :-)

Answer 1

Try this rule:

RewriteCond %{REQUEST_FILENAME}.html -f
RewriteRule !.*\.html$ %{REQUEST_FILENAME}.html [L]

This will rewrite all requests that can be mapped to an existing file when appending a .html.