Top 5 PDF Compressor Online for Using [2024]

July 13, 2023988 views

PDF files dominate document sharing, the need for efficient compression solutions is paramount. With the ever-growing size of PDF files, the challenges of slow uploads, downloads, and sharing have become all too familiar. As PDF relevance grows, we seek the answer to one crucial question: How can we compress PDF files online without sacrificing quality or security? Join us as we explore the top 5 PDF compressor online tools,  revealing the keys of effective  and reliable compression at your fingertips. Say goodbye to bulky PDFs and embrace streamlined sharing with ease.

Why Compress a PDF File Online?

Online PDF compressors are a practical and efficient approach to optimize your PDF documents for various purposes. By opting for online compression, you gain the benefits of convenience, accessibility, quality preservation, and compatibility while efficiently reducing PDF file sizes.


  • Reduce file size: Compressing files can significantly reduce their size, making them easier to store, share, and upload

  • Improve loading speed: Large files can slow down websites and increase bounce rates, which can negatively impact search engine rankings.

  • Save storage space: Compressing files can help save storage space on devices and servers

  • Improve file transfer speed: Compressed files can be transferred more quickly over the internet, especially in areas with slow internet speeds

  • Improve accessibility: Compressed files can be more easily accessed on devices with limited storage space or slow internet speeds

  • Improve file organization: Compressing files can help keep them organized and easier to manage

How to Compress a PDF Online Using Adobe Acrobat

Adobe Acrobat Online Tools provide an extensive set of options for managing and optimizing PDF files. One of its numerous features that stands out is the ability to compress PDF files. Users may utilize Adobe Acrobat Online Tools to efficiently reduce the size of their PDF documents without sacrificing quality or readability. This sophisticated online application offers a simple and easy-to-use solution for optimizing PDF files for a variety of uses.

Adobe Acrobat homepage


Step 1: On your browser, visit Adobe Acrobat online tool

Step 2: Users can simply select “Compress a PDF” located at the center of the screen.

Step 3: Users can also access the tool by clicking on “Compress” placed on the site menu bar.

Adobe Acrobat Compress a PDF tool

Step 4: Users can either drag or drop or browser their device to upload the PDF for compression

Upload PDF for compression

Step 5: Select the Compression Level according to your needs. High compression will reduce the file size as low as possible and with improved algorithms, the quality of the PDF is not compromised.

Adobe Acrobat Compression level

Step 6: Once the process is completed, users can save the reduced PDF on their device.

Adobe Acrobat Download compressed PDF


  • Compression that is dependable and of great quality

  • Free and simple to use

  • Safe and private

  • Creates compatible PDF files with a wide range of devices, operating systems, and PDF viewers


  • Requires stable internet connection for effective use.

  • Only one file can be compressed at a time.

  • May not work for very large or complex files

How to Compress a PDF Online Using iLovePDF?

iLovePDF is a complete online application that allows you to alter PDF files in a variety of ways, including compression. Users may simply reduce the size of their PDF documents with iLovePDF's online compression tool, which requires no programme installation. It provides a simple and easy-to-use platform for optimizing PDF files, allowing for quicker uploading, downloading, and sharing while keeping document quality.

ilovePDF homepage


Step 1: Visit ilovePDF on your browser.

Step 2: To access ilovePDF compression tools, simply locate “Compress PDF” on the screen or on the site menu bar.

ilovePDF tools

Step 3: Browse your system to upload PDF

ilovePDF upload PDF

Step 4: After uploading the PDF, users will be asked to select the Compression Level of their PDFs

ilovePDF Compression Level

Step 5: Users can download and save the compressed PDF, and share it with others.

ilovePDF download PDF


  • Free and easy to use

  • Compression level is adaptable and changeable.

  • Integration of batch processing and cloud computing

  • Multiple languages are supported.


  • May reduce the quality of some images or fonts

  • Requires internet connection

  • Compression limitations, requiring premium subscription or upgrade.

How to Compress a PDF Online using WPS PDF tool

WPS Office provides a variety of strong online tools that help users compress PDF files efficiently. Users may simply minimize the size of their PDF documents with WPS Office Online Tools without the need for extra software installs. This user-friendly software provides several advantages for optimizing PDF files and enhancing workflow efficiency.

WPS Office PDF Tools homepage


Step 1: To access WPS Office PDF tools, simply visit their website

Step 2: Scroll down and find “Compress PDF” tool

WPS Office Compress PDF Tool

Step 3: Browse your device to upload PDF that needs to be compressed

WPS Office Upload PDF

Step 4: Select the compression level. The recommended level by WPS Office make sure the size is reduced and the quality is not compromised

WPS Office compression level

Step 5: Once the PDF is compressed, users can download and save the PDF on their system to later share it others.

WPS Office PDF download


  • Supports multiple platforms and PDF compression.

  • User-friendly interface

  • Free and simple to use

  • Batch processing and cloud integration


  • May reduce the quality of some images or fonts

  • Requires internet connection

  • May not work for very large or complex files

WPS Office- Free All-in-One Office Suite
  • Use Word, Excel, and PPT for FREE, No Ads.

  • Edit PDF files with the powerful PDF toolkit.

  • Microsoft-like interface. Easy to learn. 100% Compatibility.

  • Boost your productivity with WPS's abundant free Word, Excel, PPT, and CV templates.

5,820,008 User
Algirdas Jasaitis

How to Compress a PDF Online using SmallPDF tool

SmallPDF Online Tools provides a complete set of tools to improve your PDF experience, including an easy-to-use compression tool. Users may quickly optimize their PDF documents by lowering their size without sacrificing quality or security using Smallpdf. Let's look at the advantages and disadvantages of utilizing SmallPDF Online Tools to compress PDF files.

SmallPDF homepage


Step 1: Go to your browser and visit SmallPDF tools

Step 2: Scroll down and find Compress PDF under Most Popular tools

SmallPDF Compress PDF

Step 3: Users will be redirected, upload your PDF by drag and drop or browse your system.

SmallPDF upload

Step 4: Users will be asked to select the Compression Level, this would determine the size of the PDF after compression.

SmallPDF compression level

Step 5: After completion, simply download the PDF file and save.

SmallPDF download PDF


  • User-Friendly Interface

  • Wide Compatibility


  • Limitations on Free Version

  • Internet Connection Dependency

How to Compress a PDF Online using PDF24 tool

PDF24 Online Tools is a complete platform with a variety of capabilities for managing and optimizing PDF files. Among its many features, PDF24 Online Tools offers a smooth solution for PDF compression, allowing users to minimize file size without compromising quality. PDF24 Online Tools, with its user-friendly design and accessibility, enables users to easily compress PDF documents, increasing their efficiency in sharing, saving, and managing information.

PDF24 homepage


Step 1: Simply visit PDF24 website

Step 2: From the tools available, select Compress PDF

PDF24 Compress PDF

Step 3: Browse your device and upload the document for compression

Step 4: Users can customize their compression such as color, image quality and DPI to make sure the size reduces according to the requirements

PDF24 upload PDF

Step 5: Download the compressed PDF and save it in your device

PDF24 download PDF


  • Offers compression levels for balancing file size and PDF quality preservation.

  • Easy to use


  • Allows only file to be compressed at a time

  • Requires a stable internet connection for effective use

Benefits of Compressing a PDF File Online

Compressing a PDF file online has several benefits, including:

  • File size is reduced when a PDF file is compressed, making it easier to share the document online or by email.

  • Compressed PDF files take up less storage space on your device, making room for other documents and files.

  • Email performance is improved because compressed PDF files are easier and faster to download, which improves email performance.

  • Minimizing file size can also help you upload a PDF file faster by minimizing the amount of storage and data necessary for the upload.

How to Compress a PDF to a Chosen Size

  • Select an Online Compressor Tool: Select a reliable PDF compression tool that provides the option to compress the file to a chosen size. Users can opt for WPS Office online PDF tools; provide easy and simple Online Compression tools.

  • Upload PDF: Upload the PDF for compression

  • Select Compression Level: WPS Office allows you to select the size of your compress file. 3 options are available; HD, recommended and smallest. If you wish to compress the file at HD level the file size will be reduced slightly. Smallest, as the name suggests, reduces the file size to the maximum limit without compromising on the quality of the PDF.

  • Download PDF: Once the PDF is completed, users can simply download their PDFs.

FAQs about PDF Compressor Online

Q1. How do I make a PDF file smaller so I can upload it?

Users can reduce the size of their PDFs using a PDF Compressor. There are many online and offline PDF compressors available, however, it is recommended to use WPS Office as it provides both online and offline options along with other user friendly tools.

Q2. How do I reduce the size of a PDF in Preview?

To reduce the size of a PDF in Preview:

  • Open the PDF in Preview.

  • Go to "File" and select "Export."

  • Select Reduce File Size from the Quartz Filter pop-up menu.

  • Adjust settings if available and save the compressed PDF.

Q3. What do I do if my PDF is too big?

If your PDF is too big, you can try reducing its size by using online PDF compressors or specialized software tools. These tools can help you optimize the PDF file and make it more manageable for uploading, sharing, or storing.

Streamline Your PDF Sharing Experience with WPS PDF tools

With the increasing dominance of PDF files in document sharing, the need for efficient PDF compression solutions becomes crucial. By utilizing online PDF compressors, users can overcome the challenges of slow uploads, downloads, and sharing associated with large PDF files. Among the top 5 PDF compressor online tools explored, WPS Office stands out as a reliable and user-friendly option. It offers convenient compression options, compatibility with various devices and operating systems, and the ability to maintain quality while reducing file size. Take control of your PDF files today, try out WPS Office's online PDF compressor. Click here to compress your PDFs now

15 years of office industry experience, tech lover and copywriter. Follow me for product reviews, comparisons, and recommendations for new apps and software.