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Home / Blog / Compress PDF to 500KB for Free in a Flash [6 Best Compressors]

Compress PDF to 500KB for Free in a Flash [6 Best Compressors]

By Charlotte | Follow twitter | Updated on October 23, 2023
Large PDF files consume storage space and pose challenges for emailing or uploading them to various platforms. To solve these issues, you may need to compress PDFs to 500KB or a smaller size. For that purpose, using a great PDF compressor is wise. Taking compression speed and ease of use into consideration, there are desktop and mobile apps as well as online tools available.  Some of them like SwifDoo PDF even contain extra features for further editing the PDFs.

Learn about and select from the best 6 compressors to compress PDFs to 500KB or under 500KB efficiently for free.

Compress PDF to 500KB for Free with SwifDoo PDF

SwifDoo PDF is a light and fast PDF compressor, editor, and reader that enables you to compress PDFs to 500KB or below 500KB without losing quality. It offers low, medium and high compression levels and allows you to customize the image quality and resolution. The compressed file size will be shown beside the original. The software supports batch compressing numerous files in one go. Trusted by PCWorld, it comes with streamlined workflows and an intuitive interface.

Follow the quick steps below to compress PDF to 500KB or less than 500KB for free.

Step 1: Open SwifDoo PDF and drag and drop your PDF into it;

Step 2: Go to Edit on the top to choose Compress;

Step 3: Select your desired compression level, and change other settings as needed;

Step 4: Choose a saving location and click Start to begin compressing.

Compress PDF to 500KB with SwifDoo PDF

Not only compress PDFs to 500KB, the desktop offline PDF compressor can also change the page dimension of, crop, and split a PDF. For PDF documents already compressed or with nothing to compress, the latter features come in handy.

A free trial allows you to perform all these tasks without paying anything.


  • The best PDF compressor lets you determine how much compression to do and whether to keep the image quality when you compress PDFs to 500KB.
  • Batch compression is supported.
  • High processing speed.
  • Modify, organize, convert and protect PDFs.

Download SwifDoo PDF to complete your file compression work effortlessly.

Compress PDF to 500KB for Free with Top 5 Compressors

Next, 5 PDF compressors for iPhone, Android and web users are introduced to reduce the PDF file size to 500KB or below 500KB.

1. PDF Compressor - Compress PDF

You can compress PDFs to 500KB on the go using PDF Compressor - Compress PDF on your iPhone. The app doesn’t require you to sign up or provide personal information. It allows you to specify a compression level from three options and download the compressed PDFs for free. It will display how much smaller your PDF has been and the source and resulting file sizes.

Compress PDF to 500KB with PDF Compressor - Compress PDF

To compress PDFs to 500KB, select the PDF file you wish to compress to 500KB from your phone, choose the compression level and click Compress PDF. The drawback you should note is the app has many pop-up ads and doesn’t offer other tools. Only one file can be compressed at a time.

2. PDF Compressor - Compress PDF File

PDF Compressor - Compress PDF File is an Android app to compress PDFs to 500KB. This free PDF compressor allows you to set multiple compression options like image quality, PDF flattening, font option and more. So you can remove as much unnecessary data as you want. The downside is it’s a bit slow to compress a PDF file to 500KB or less than 500KB with the tool and some ads are disturbing.

Compress PDF to 500KB with PDF Compressor - Compress PDF File

3. iLovePDF

iLovePDF is another way to compress PDFs to 500KB. This online free website and software application is accessible from any device, including Windows, Mac, Linux, and Android. It allows you to upload files from your local device, Google Drive and Dropbox. You can compress the PDF file size to 500KB, 200KB or less by 3 compression levels. The software is also one of the best PDF editors.

Compress PDF to 500KB with iLovePDF

4. Adobe Acrobat Online

To compress PDFs to 500KB online, Adobe Acrobat Online service is good to go. It allows you to drag and drop a PDF to its interface to get started. You will see the estimated size after compression under each compression level option. When you compress PDF files to 500KB or less than 500KB with the best PDF compressor online, the file uploading and compressing speed is often slow.

Compress PDF to 500KB with Adobe Acrobat Online

5. 11zon

Another online PDF compressor to compress PDFs to 500KB without installing software is 11zon. This is a multi-purpose PDF and image service with the ability to compress images, rotate and merge PDFs and do a lot more. It offers a slider for users to adjust the compression level in percentage. A preview of the uploaded PDF will be presented. The PDF to PDF compression to create a file less than 500KB can be done on a multilingual interface.

Compress PDF to 500KB with 11zon

Regarding how to compress PDFs to 500KB, the method is similar to that with other compressors: Select a PDF, set the compression level, click "Compress" and download the output.


When you have big PDF files with many heavy graphics and photos, compress PDFs to 500KB or less using the best 6 compressors without breaking a sweat. If you want to make the PDF appealing, it’s best to use a lower compression level and keep the image quality as much as possible. Among all these PDF compressors, SwifDoo PDF could stand out with its reliable security, time-saving compression speed, and bulk compression ability.

Try it to compress a larger PDF to a 500KB PDF for free now! If you find the file size is reduced very little, that’s usually because there is already nothing to compress.

Charlotte has been in the software industry for 8+ years. She works for AWZWARE now as a passionate writer. She is good at providing simple guides to use various video, office and entertainment software. Charlotte also recommends many other useful tools to make your work and life easier. A food lover too.

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