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PDF compression
Compress a large PDF file to reduce the file size. There are multiple compression options
Completely free on-line No restrictions
How to compress PDF files online
With just 5 simple steps, you can compress your PDF files online!
- Click the Select File button or drag the file to the box above to upload the PDF file
- Select the compression mode you want: balanced, high compression and high quality
- Click the compression button to compress PDF
- Wait a few seconds or minutes, click the download button to download the file
- Or you can choose our other PDF tools, such as PDF splitting, PDF to Word, or water printing
Excellent PDF online compression tool PDF88
Completely free
Our PDF online compression tool is completely free of charge, without any hidden fees, and without the need for registration, payment, login and other tedious operations, it can be used directly!
Easy to use
It only takes four simple steps to compress one or more PDF files without downloading software
Best PDF compression online tool
Three compression modes are available, which can be adjusted independently. You can adjust the file size and quality freely
Superior performance
Dozens of megabytes and hundreds of pages of PDF files can be compressed in seconds without waiting for a long time
security
Our server does not save any of your data. After processing, it will be deleted immediately. You need to upload it again next time
Leading technology
The industry-leading PDF technology solution, PDF compression maximizes the file quality, reduces the file size, has rich functions, and more functions to unlock
Online PDF compression FAQ
Is your online PDF compression tool free?
you 're right! All tools of PDF88, including online compression tools, are free to use.
How do you compress PDF?
When compressing PDF files, we will use different methods to reduce the file size
The compression effect varies depending on the PDF file data. Generally speaking, the larger the image, the better the compression effect
First, unnecessary font information will be removed for display
Depending on whether the compression mode is balanced, high compression or high quality, we use different image compression ratios, colors and DPI
to optimize the structure of the PDF file and remove redundant informationWhy is my PDF file so large?
If your PDF file contains more images, the file size will be large. In general, plain text PDFs are much smaller. If your PDF file has pictures, you can use PDF 88 to compress PDF pictures and delete unnecessary structures to reduce the file size.
Can the PDF format itself be compressed?
PDF generally compresses the contained objects. However, this is optional. Objects in PDF files can be partially or completely compressed. Software that creates PDF files, such as Adobe, to decide whether to compress objects. PDF compression is not required in the PDF standard.
How to select compression mode?
If you don't know which compression mode to use, just use the default one. We will consider the balance between image quality and file size
If you have high requirements for image quality and want to retain the original image resolution, color and quality as much as possible, you can choose high-quality PDF compression
If you want to reduce the file size more, you don't care much about the image quality. You can choose the high compression option.Is your compression tool safe?
PDF88 attaches great importance to the data security of users. Security makes us first consider and focus on safeguarding
All data transmission channels are encrypted with SSL256, and other people cannot steal the data in them
After processing, we will delete your files from the server immediately! Instant transfer and use, each PDF processing is a one-time use