Batch Scale PDF is described as 'quickly scales many PDF files to any size PDF. Originally intended to scale sheet music of different sizes, Batch Scale PDF should work on most PDFs, for any purpose. It’s the quickest way to resize many PDFs with one click!' and is an app in the Office & Productivity category. There are five alternatives to Batch Scale PDF for a variety of platforms, including Windows, Android, iPhone, Mac and iPad. The best alternative is Adobe Acrobat DC. It's not free, so if you're looking for a free alternative, you could try PDF Reader or LightPDF. Other great apps like Batch Scale PDF are Ashampoo PDF Pro (Paid) and UPDF Reader (Free).
LightPDF is the best free online PDF tool that allows you to edit and convert PDF. Also, you can use it to convert other types of files to PDF. It is quite easy and safe to use. No watermark, no plugins and no limits to the time or size.
UPDF Reader is a free document reader program for opening and viewing unshared PDF and UPDF files created by PDF Unshare product. With UPDF Reader, You can open and view authorized UPDF (.updf) and unshared PDF (.pdf) documents easily on Windows, iOS and Android devices.