Follow these easy steps to compress a large PDF file online:
Reduce PDF file sizes online
The Adobe Acrobat Compress PDF online tool lets you compress PDF files right from your browser. Use our PDF compressor to make large files smaller and easier to share.
An easy PDF compressor
Drag and drop or upload a PDF document to let Acrobat reduce its size. Once compressed, you’ll find the doc simpler to work with, store and share.
The best PDF compressor
Adobe invented the PDF format. Use our high-quality PDF compressor to reduce the size of your files with any web browser, including Google Chrome.
How to compress a PDF online
How to compress a PDF online
Click the Select a file button above or drag and drop files into the drop zone.
Select the PDF file you want to make smaller.
After uploading, Acrobat will automatically reduce the PDF 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 optimised file size against the expected quality of images, fonts and other file content. Just drag and drop a PDF into the PDF compression tool above and let Acrobat reduce the size of your PDF files 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 for the Mac or Windows operating system lets you customise PPI settings for colour, grayscale and monochrome image quality. You can also use PDF editor tools, edit scans with OCR functionality, convert PDFs to Microsoft PowerPoint and other file formats, convert PNGs and other image file formats, organise and rotate PDF pages, split PDFs and more.
What size PDFs can I compress?
The Acrobat online PDF compressor tool can compress a PDF of up to 2 GB.
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.
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Use the highest quality online PDF tools from the inventor of PDF. Sign in to do more with your stored files.