File Extensions on the Internet

I simply wanted to know Which file extensions are used on the internet?

So I wrote a little program (webExtension.py) and a half million calls to Google later, we have some interesting data.

First, the raw data:

html 6 700 000 000
php 5 980 000 000
htm 1 690 000 000
asp 1 510 000 000
aspx 1 380 000 000
jsp 565 000 000
cfm 385 000 000
pdf 298 000 000
do 242 000 000
cgi 199 000 000

Some interesting facts I saw :

Some caveats

If anyone makes any interesting observations with this data, please let me know and I’ll post it here. Pretty graphs are welcome as well :)

Posted on 20 October 2009 by Paul Tarjan

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