Should I use mod_rewrite now ?

[rahman15]

I have a data driven website which is fairly new. I did not use mod_rewrite to make URLs search engine friendly. But fortunately Google already indexed about 500 pages of my website.
Now I am considering using mod_rewrite. Should I do this? Will it effect to my indexed pages?
Thanks,

[mad4]

Search engines can crawl urls with query strings without a problem.

The (small) advantage of mod rewrite is that you can get keywords in the url.

[websiteideas]

It should work fine with your indexed pages - both the old and new urls will work.

[mad4]

It should work fine with your indexed pages - both the old and new urls will work.

You have to make sure you 301 redirect the old url to the new one.