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How to compress a PDF

Follow these easy steps to compress a large PDF file 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.

Download your compressed PDF file or sign in to share it.

Try our free PDF compressor tool

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.

A compressed PDF file that can be easily shared

An easy PDF compressor

Drag and drop or upload a PDF document to let Acrobat complete the file size reduction. You can then work with, share, or store the compressed file more easily.

Choose your compression level

If you need the smallest file possible, select High compression level. You can select Medium or Low compression if you want to reduce the file size but maintain a higher file quality.

Share files online

By compressing files, you make them much easier to share. If you email a file, the smaller size can help you avoid email file size limits, and uploads are faster too.

File security you can trust

Security is paramount to Adobe. If you don't sign in or save your file, it will be deleted from our servers to respect your privacy. Security measures are also built into every PDF created with Acrobat.

The best PDF compressor

Adobe invented the PDF format and delivers high-quality online tools. Try our free tool to compress a file in any web browser, including Microsoft Edge or Google Chrome.

Questions? We have answers.

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 PDF compression tool above and let Acrobat reduce the size of your PDF files without compromising quality.

For more refined control of optimization settings, you can try Adobe Acrobat Pro for free for seven days. Acrobat Pro lets you customize PPI settings for color, 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, organize and rotate PDF pages, split PDFs, optimize PDFs, and more. You can use Acrobat on any device, including iPhones, and on any operating system, including Mac, Windows, Linux, iOS, or Android.

The Acrobat online PDF compressor tool can compress a PDF of up to 2GB.

When you select a PDF to compress, the Acrobat PDF compressor tool will show the file size after uploading the file. It will also show the estimated file size after compression based on if you select the High, Medium, or Low compression level.