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Top 6 Online PDF Compression Tools

PDF documents are portable and easy to keep, but they often consume ample amount of your memory storage. If you have numerous numbers of PDF files saved on your PC for safekeeping or for later use, you may need to reduce the large sized PDF to smaller ones. Then a PDF compression tool is needed. There is a variety of such applications available online, here we list some compression tools to help you achieve this. Also, you can download a desktop app to reduce PDF file.

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Best PDF Compression Too

Best Online PDF Compressors


LightPDF is an online PDF platform that provides various PDF tools, including PDF to Word/PPT/Text converter and online PDF editor. Besides, it also allows users to add watermarks to PDF, merge PDF, and split PDF, etc. Being an integration of PDF tools, it also has the feature of compressing PDF files. With this PDF compression tool, you can compress your PDF in seconds. Just click the “Choose file” button or drag and drop the PDF file that you want to compress to the file box, and then this tool will load the file and compress it automatically. Once done, click the download button to download the compressed file.


  • Fast compression speed
  • No watermark
  • No time or size limits


  • Not support batch compression

Online File Compressor

Online File Compressor is also a nice utility for shrinking PDF size. In addition to compressing PDF file, it is able to compress videos in MP4, MOV, 3GP, WMV, RMVB, and images in JPG, JPEG, PNG, etc. formats. It can show the compressed file size and compression rate. This PDF compression tool is a totally free service and allows you to choose one compression type from the three options: Size, Normal and Quality.

Online File Compressor


  • No file size limit
  • No registration and installation required
  • Fast compression speed
  • Output high quality file


  • Can’t preview compressed files before downloading


In order to compress a PDF file to a smaller size, you can rely on a web-based program called iLovePDF. This program can reduce the size of PDF documents. To compress PDF documents with this app, all you need to do is to drag and drop the PDF to the file box or click “Select PDF file” to locate the PDFs and then open it. Once the PDFs are uploaded to the site successfully, you will be given an option to choose the type of compression level from Extreme Compression, Less Compression, or the Recommended Compression. Afterwards, click “Compress PDF” button to initiate the compression.

PDF compression tool iLovePDF


  • Cloud service access
  • Three compression modes provided


  • Limited to compress 3 PDF files at once for free

PDF Compressor

The next one of the best PDF compression tools that you can use is PDF Compressor. By using this program, the PDF compression can be easily done with few clicks. Simply drop the files into the program or click “Upload Files” to load the PDFs that need to be compressed. The documents will be uploaded and compressed immediately. Then you can download the files individually or download them all at once. They will then be saved on your PC in a zipped folder.

best online PDF compressor


  • Batch compression (up to 20 files) supported
  • File thumbnail preview supported


  • No compression level or quality option provided


Another one of the best PDF compressors on our list is PDF2Go. It can handle various PDF files and can compress a large file into a smaller one. Loading a file can also be done by dragging the PDFs directly on the interface, opening it by hitting choose file button, or accessing your files directly from cloud storage. Aside from loading files individually, this tool supports batch compression, which makes it easier to process multiple files.

Before starting the compression, you can choose the quality of the PDF by going to “Settings”, and then hit “Save changes” and it will work right away. Once the compression is done, you can download the compressed PDFs in a zipped folder.

best online PDF compressor PDF2Go


  • Batch compression supported
  • Compression quality options available


  • Complex additional steps lower the compression efficiency


DocuPub is considered to be the best online PDF compressor. Unlike other PDF compressing applications, it requires necessary configurations before uploading the PDF document that needs to be processed, including the quality of the compressed PDF as well as the image settings. Once done settings, you can start the compression by hitting “Upload and Compress”. A preview of the processed file will then be shown on another browser tab where you can check and save it.

best PDF compression software


  • Support to upload a file up to 20MB.
  • Compression quality options provided


  • Redundant compression settings
  • Not support batch compression

Those are the best PDF compression software that you can use anytime when you need to reduce the file size of your PDF document. Each program has distinct functions compared to one another, and all of them are free to use even though some have limitations. You may choose one that meets your needs, and start compression online now.

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Posted by: Alice on to Tips and Resources,Follow me on Twitter.Last updated on March 11, 2020

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