Compress PDFs online for free

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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 optimise PDF online tool to reduce the size of your PDF files in seconds.

How to reduce the size of a PDF online

Follow these easy steps to compress large PDF files online:

Click the Select a file button above, or drag & drop files into the drop zone.
Select the file you want to make smaller.
After uploading, Acrobat automatically reduces the PDF file size.
Sign in to download or share your compressed PDF.

How do I compress a PDF without losing quality?

The Acrobat online PDF compression tool balances an optimised 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 optimisation settings, you can try Adobe Acrobat Pro DC for free for seven days. Acrobat Pro DC lets you customise PPI settings for colour, grayscale and monochrome images.