If you have have Microsoft Word Documents, Microsoft Excel Spreadsheets, Microsoft PowerPoint Presentations, Rich text, Plain text or HTML on your hard drive that you would like to convert into PDF at once without investing in commercial software like Adobe Acrobat, you can try Google Docs.
Google Docs Support to convert documents like Microsoft Word (.doc, .docx), OpenDocument text (.odt), StarOffice text (.sxw), Rich text (.rtf), Plain text (.txt), HTML (.htm, .html), Microsoft PowerPoint (.ppt, .pps), Microsoft Excel (.xls, .xlsx) files, OpenDocument spreadsheets (.ods), Comma-separated values (.csv)
How to convert your document from Google Docs to PDF
Step 1: Create a new folder in Google Docs where you want upload all your documents and presentations that are to converted into PDF.

Step 2: Now select the Upload Document option in Google Docs, set the destination folder to the one that you created in Step 1 and upload all your documents.

Step 3: Once all files are uploaded onto Google Docs, open the dashboard again and select all the files and choose Export under More Options button. Select PDF as the output format and all your Microsoft Word Documents, Microsoft Excel Spreadsheets, Microsoft PowerPoint Presentations, Rich text, Plain text or HTML will be instantly converted into PDF.

If you are converting a large documents into PDF, you dont must wait within the browser for the conversion to finish as Google Docs will automatically send you an email as soon as the processing is over. The email will have a link from where you possibly can directly download all the PDF files in one significant ZIP.

Great tip! Life saver for those cases where you’re not using your own computer or where your computer has no PDF creation software.