Drag and drop a PDF to reduce its file size fast.
Select a PDF to reduce its file size fast.
Select a PDF to reduce its file size fast.
How to compress a PDF
Follow these easy steps to compress a large PDF file online:
- Click Select a file in the box above or drag and drop your PDF into the drop zone.
- Choose the PDF file you’d like to compress in file size.
- Select your compression level – High, Medium or Low.
- Click Compress. The compress tool will automatically reduce the file size.
- Save your newly compressed PDF. You can also sign in and share with collaborators.
Try out our free online PDF compressor tool today
Reduce PDF files for free online
With Adobe online tools, you can make light work of all your tasks. Use the compress PDF tool to reduce the size of PDF files in just a click.
Compress PDF files quickly and easily
Upload PDF files and let Adobe online tools do all the work. Compress your PDF files to a smaller file size, making it easier to save in storage, share and attach to emails.
Finetune your compression quality
You choose how small to make your files. Different compression levels can affect the quality. Need a super small PDF file? Select High compression. To retain a higher file quality, choose Medium or Low compression.
Share PDFs with collaborators
Avoid email file size limits and enjoy faster upload speeds with smaller files. Our compress PDF tool opens up the possibilities for sharing documents online.
Edit sensitive files securely
We value your security above all else. With Adobe online tools, if you don’t save your file, we’ll delete them from our servers to protect your privacy. We also install safety measures into every PDF created using Acrobat.
The leading PDF compressor tool
Adobe created the PDF file format. That’s why we offer the best editing tools available online. Try our free compression tool and reduce file sizes securely on your browser – including Microsoft Edge and Google Chrome.
Read our FAQs
How do I compress a PDF for free?
You can compress a PDF for free using Adobe’s online tools. Simply use the Select a file button on the page above to navigate to the file you want to compress. Alternatively, you can drag and drop your file into the box with the dotted outline. You can choose to compress your file in one of three compression levels – high, medium, or low, depending on your requirements.
How do I compress a PDF without losing quality?
Adobe online tools can compress PDFs without compromising quality. Choosing a low compression level reduces the file size to approximately 1.0MB while retaining the highest quality settings. For even smaller files, you can select medium compression to reduce your PDF size to further.
To find out more visit our guide on how to compress PDF to 1MB and lower. You can also try a 7-day free trial of Adobe Acrobat Pro and use precise optimisation tools.
What size PDFs can I compress?
Adobe online tools can compress PDF files up to 2GB using the compress PDF size tool.
How do I make a PDF smaller so I can upload it?
If you need to upload a large PDF to an online platform – for example, for a school or work project – you may need to make it smaller by reducing the file size. You can do this easily, and for free, using Adobe’s online tools. Remember to check the maximum file size for the platform you need to upload your PDF to so you can compress it to the correct size.
How do I check my PDF file size?
Our compress PDF tool will show you how large your file is after compression. Check the estimated file size before you click Compress when browsing compression level options. On Windows, you can also check file sizes by right-clicking the file in your folder and selecting Properties. On Mac, you can do this my control-clicking the file and selecting Get Info.
Are Adobe online tools free?
Yes, Adobe online tools are free to use. They enable you to convert files from one format to another or compress file sizes. To use the tools, go to one of the pages – for example, PDF to Word or Excel to PDF – and follow the simple instructions before downloading your converted or compressed file. Want to share the file? You’ll need to sign up to a free Adobe account.
Use Acrobat tools for free
- Sign in to try 25+ tools, like convert or compress
- Add comments, fill in forms and sign PDFs for free
- Store your files online to access from any device
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