10 Best Free Online PDF Compressor in 2023

PDFs serve as one of the most secure ways to share documents online. The file format is now widely used by businesses and individuals worldwide. The great thing about PDF is that it doesn’t let you modify the data stored.

Most file-sharing websites you use today support PDF; however, they often have PDF file size restrictions that don’t allow users to upload a PDF with a file size of more than a specific limit. Since you can’t edit PDF files without proper tools, one option is to compress the PDF file.

Also Read: How to Edit PDF Files for Free

10 Best Online PDF Compressors

So, in this guide, we have decided to share some of the best websites you can use to compress PDF files. Below, we will share some of the best websites to compress PDFs online. Most of the websites were free to use, but they were ad-supported. So, let’s check out.

1. Adobe Online PDF Compressor

Adobe Online PDF Compressor

Adobe also offers you a web tool for compressing PDF files. Guess what? Adobe Online PDF Compressor is extremely simple to use and supports drag-and-drop functionality.

The web tool claims to compress your PDF files in no time while maintaining quality. The only drawback of Adobe Online PDF Compressor is that it requires you to log in with an Adobe account.

2. Sejda PDF Compressor

Sejda PDF Compressor

If you are looking for a no-fuss web-based PDF Compressor, look no other than Sejda PDF Compressor. Sejda PDF Compressor is one of the best & secure online PDF compressors you can use today.

Every PDF file you upload is automatically deleted after 2 hours, allowing you to upload PDF files with up to 200 pages or 100MB in size.

Before compressing the PDF file, you can choose the image quality, resolution, conversion method, and compression speed. Overall, Sejda PDF Compressor is a great free online PDF compressor that you can consider.

3. IlovePDF


Well, it’s a website that has every tool you need to work with PDFs in one place. The website can merge, split, compress, and convert PDF files.

To compress a PDF file, you need to upload the PDF file and click on the ‘Compress’ button. The web app will reduce the file size without affecting the PDF quality.

4. SmallPDF

SmallPDFSmallPDF is another best PDF websites on the list to compress PDF files. The site lets you reduce your PDF size without losing quality.

Apart from compressing, SmallPDF can also convert your PDF file to various formats like PPT, JPG, EXCEL, Word, etc.

5. PDF Compressor

PDF Compressor

PDF Compressor might be the best pick if you are searching for an easy-to-use online PDF compressor. The site lets you compress PDF files for publishing on web pages, sharing on social networks, or sending by email.

You must upload the PDF file on the PDF Compressor and hit the compress button. Apart from compressing, PDF Compressor can also convert and combine PDF files.



This is another best online PDF compression tools you can use. With PDF2GO, you can quickly reduce the PDF file size. The web tool offers you two different forms of compression – Basic and Strong.

The Basic one gives a medium file size and high quality, whereas the Strong Compression gives a smaller file size and medium quality. PDF2GO can split, merge, and convert PDF files apart from the compression.

7. SodaPDF

SodaPDFSodaPDF is the best online PDF compression tool you can use today. It uses advanced techniques to reduce the PDF file size without compromising quality.

It also has an advanced compressor option to set the compression level. The tool is free to use, and it’s the best online PDF compressor tool you can use today.

8. AvePDF


AvePDF is one of the best and easy-to-use websites for compressing PDF files online. To compress a PDF file, drag and drop your PDF files from the computer. It lets you choose the compression quality beforehand.

You can choose the compression level from low to very high. AvePDF offers a PDF splitter, PDF merger, and PDF converting options.

9. Wecompress


Wecompress can compress PDF, Powerpoint, Word, Excel, JPEG, PNG, and TIFF files online.

Wecompress is faster and easier to use than other online file compressors. Today, millions of users use web-based services to get their compression stuff done.

10. PDFCandy


If you are looking for a safe and easy-to-use web app to compress your PDF files, PDFCandy might be your best pick.

PDFCandy is entirely free to use, and you can use it to reduce the sizes of PDF files. Apart from compressing, it lets you split PDFs, crop PDFs, convert PDF files, etc.

Frequently Asked Questions:

Which is the best PDF size reducer online?

All of the PDF size reducers we have listed in the article are free to use, and most don’t require any account creation. You can use these sites to reduce the size of PDF files.

How to Reduce PDF size to 100kb?

The best way to reduce PDF size to 100 KB is through an online PDF Compressor. Since online PDF compressors don’t require additional app installations, they are easy to use, and you can access this on the go.

Does reducing PDF size lead to quality loss?

The answer to this question depends on how much compression you are using. If you are about to trim almost 50% of the file size, you can expect visible quality loss. On the other hand, if you want to reduce a few KBs, the quality loss will be less noticeable.

How to Reduce PDF size without losing quality?

Free online PDF compressor allows you to pick the compression strength beforehand. Hence, to avoid quality loss, you need to pick a PDF compressor that offers lossless PDF compression.

So, these are some of the best online PDF compressors you can use today. You can compress your PDF files without installing third-party apps with these free PDF compressors. If you know other PDF compressors, let us know in the comment box below.



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