By skyforbes 
Quickly Compress A PDF
There are three ways to upload your file: drag & drop, browse your hard drive or upload a PDF file from the cloud.
Once you did so, you can choose a preset to change and adjust the quality of your PDF file. You can choose between “basic” and “strong” compression, and using a preset.
Additionally, you can also choose to turn all images in your PDFs to grayscale which will reduce the file size as well.
Compress PDF online
No need to download and install software – compress PDF files online from anywhere by just using an internet browser.
PDF2Go’s PDF compressor gives you a secure and virus free alternative to many downloadable PDF compression programs and applications. That way, you can safely reduce the dpi of images contained in your PDF and thus reduce the file size.
Why PDF Compression?
When sending files via e-mail or uploading them to the web, you have to pay attention to one crucial thing: file size. Job applications, providing documents and handing in assignments in a PDF format are the usual thing by now.
To be able to send such files you need a smallpdf.
Using a PDF compressor, you can make sure that both uploading or sending of formerly large PDF files is possible.