Follow these easy steps to compress large PDF files online:
Reduce file size online
Adobe Acrobat online services let you compress PDF files right from your browser. Use our PDF compression tool to make your large PDFs smaller so they’re easier to share.
Easy PDF file compression
Drag and drop or upload a PDF document to let Acrobat reduce its size. After compressing the file, you’ll find it’s simpler to work with and store.
The best PDF compressor
Adobe invented the PDF format. Try the highest quality optimize PDF online tool to reduce the size of your PDF files using any web browser, including Google Chrome.
How to reduce the size of a PDF online
How to reduce the size of a PDF online
Click the Select a file button above, or drag & drop files into the drop zone.
Select the PDF file you want to make smaller.
After uploading, Acrobat automatically reduces the PDF file size.
Sign in to download or share your compressed PDF.
Questions? We have answers.
How do I compress a PDF without losing quality?
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.
Is there a PDF file size limit?
The Acrobat online file compression tool can compress PDFs of up to 500MB.
How do I check my PDF file size?
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.
Questions? We have answers.
Convert and compress with ease
Use Acrobat online services to convert Microsoft Word, Excel, and PowerPoint files to PDF. You can convert JPGs and compress files too.
Do more with your PDFs
Do you need to convert, combine, sign, and share files? Subscribe to Adobe Acrobat PDF Pack for a set of online tools.
Get the best with Adobe
Use the highest quality online PDF tools from the inventor of PDF. Sign in to do more with your stored files.