converting .htm to .html

will it hurt rankings?

[4string]

I'm converting an old frontpage site to a real site. All the pages but the home page have an .htm extension and are indexed that way in Google. If I switch them to .html will it kill the good rankings they have?

Should I set up redirects in htaccess?

[mrMister]

If I switch them to .html will it kill the good rankings they have?

Yes, changing the file names means that Google will view each one as a different page completely.

Just leave the filenames as they are a .htm file is still a HTML file, it just has an abbreviated file extention.

There's no benefit in changing your files from .htm to .html , so leave them as they are.

Don't set up redirects, that won't prevent your rankings being damaged, it just helps them recover (eventually).

[taps]

Don't do it. Your SERPS will be hurt very hard.

[4string]

That's what worried me. OK, I won't change them. Thanks for the advice.

[arrowman]

"Cool URI's don't change"
- Sir Tim

Google for that title.