PDF to Text OCR with Google
From Free Knowledge Base- The DUCK Project: information for everyone
Convert Scanned PDFs to Text
Now if you have bunch of scanned PDF files on your hard drive and no OCR software, here’s what you can do to convert them into recognizable text.
Create a folder in your website (say abc.com/pdf) and upload all the PDF images to that folder. Now create a public web page that links to all the PDF files. Wait for the Google bots to spider your stuff.
Once done, type the query "site:abc.com/pdf filetype:pdf" to see the PDF documents as HTML.