The Acrobat online PDF compressor balances an optimized file size against the expected quality of images, fonts, and other file content. Just drag and drop a PDF into the tool above and let Acrobat reduce the file size without compromising quality.
For more refined control of optimization settings, you can try Adobe Acrobat Pro DC for free for seven days. Acrobat Pro DC for Mac or Windows lets you customize PPI settings for color, grayscale, and monochrome image quality. You can also edit PDF files, edit scans with OCR, convert PDFs, convert PNGs and other image file formats, organize and rotate PDF pages, split PDFs, and more with an Acrobat Pro subscription.
The Acrobat online file compression tool can compress PDFs of up to 500MB.
To check the file size of a PDF, open the file in Adobe Acrobat or free Adobe Acrobat Reader. Then choose File > Properties. You’ll see the file size listed in the Document Properties Description tab.