Drag and drop a PDF to reduce its file size with our PDF compressor.
Select a PDF to reduce its file size fast.
Select a PDF to reduce its file size fast.
How to compress a PDF file online for free with Adobe Acrobat
Follow these simple steps to compress a large PDF file in seconds:
- Click the “Select a file” button above or drag and drop files into the drop zone.
- Choose the PDF file you want to shrink.
- After uploading, Acrobat will automatically reduce the size of the PDF.
- Sign in to download or share your compressed PDF.
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Features of compress PDF
High-quality compression
Compress your PDF files to a suitable size limit, while maintaining the quality of your document. Our compress PDF tool ensures great print quality for all your compressed PDF files.
Web browser compatibility
You can use our compress PDF tool on different web browsers, such as Google Chrome, Microsoft Edge, or Firefox.
Security
We will automatically delete your PDF from our servers unless you save the file by signing in to your Adobe Acrobat account.
Customisation
You can select the compression settings like the image quality, type and level of compression used.
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.
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
You can select between High, Medium, and Low-compression. Select High if you want to decrease PDF size to the smallest amount, and Medium or Low if you want to reduce the PDF 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 to 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.
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Compress different types of PDF files
Image-only PDF or scanned PDF
These PDF files contain images or are created from previously scanned documents. You can use Acrobat to reduce the size of your file and compress PDF to 100kb or less.
Searchable PDF
Certain documents contain text that can be selected, copied, and highlighted once the file is scanned using optical character recognition (OCR) software.
Digitally created or true PDFs
These PDFs contain both images and text, and are created using Microsoft Excel, Word, or PowerPoint.
With the PDF size reducer online tool, you can resize PDF files easily and efficiently while selecting your desired level of compression. Try Adobe Acrobat Pro to reduce the size of your PDFs with a free trial.
Questions about PDF compression? 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 for free for seven days. Acrobat Pro 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, optimise PDFs and more. You can use Acrobat on any device, including iPhones and on any operating system, including Mac, Windows, Linux, iOS or Android.
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?
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.
How to compress a PDF file further?
If you want to further compress a PDF file, you need to reduce the colour depth of the images. However, this will affect the quality of the images. You can also remove unnecessary metadata from the PDF file in order to further reduce file size.
How to reduce your Aadhaar PDF size?
To reduce the size of your Aadhaar card PDF using Adobe Acrobat, follow the steps mentioned above. Adobe can compress the file while maintaining an acceptable level of quality. Adobe offers robust security features that protect the confidentiality of your documents, so you can compress your files securely, from anywhere.
Use Acrobat tools for free
- Sign in to try 25+ tools, like convert or compress
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- Store your files online to access from any device
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