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PDF files have been around for a long time and remain a hugely popular format for document sharing. But their file size can mount when they run many pages long or have heavy graphical elements, which can cause issues when trying to send them on.

To help you with that, we’ve rounded up some free tools that will help you compress a PDF and reduce its file size. You can use a downloadable program to achieve this, but you can also use an online service; we will explore both.

If you have your own free PDF compressor to recommend, please do share it in the comments.

1. Smallpdf

Platform: online

If you’re looking for a quick and simple way to shrink your PDFs without needing to download anything, then Smallpdf is for you. This is an online service that is a breeze to use, offering a drag and drop interface and speedy compression. Not only can you access it from anywhere because it’s online, but it’s platform agnostic too.

compresspdf

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Though fairly basic in its functionality, there are some neat extra features like the ability to import your file from Google Drive or Dropbox (and save it back to the cloud How to Save Files From the Web Right to Cloud Storage How to Save Files From the Web Right to Cloud Storage If you frequently download files from the web and move them to your cloud storage account, then you can cut out the middle step with this free service. Read More once you’re done.)  The only downside is that you’re limited to compressing 2 PDF files an hour, unless you cough up $6/month.

Results of the compression varied, simply because the system is designed to reduce to 144dpi with no customization for anything else. For example, a 5.72 MB file went down to 3.17 MB, while a 96.98 MB went down to 87.12 MB. Nevertheless, if you’re just trying to get the file size down without a specific MB target, Smallpdf is great.

2. iLovePDF

Platform: online

Another online service, and one that offers a bit more finesse when it comes to the file size, is iLovePDF. You can upload a file from your system, Google Drive, or Dropbox, then select one of three compression levels. The more compression you apply, the lower the contents of the PDF will become. However, this also means that you’ll have a smaller file size.

ilovepdf

Using the same 97 MB file from before and applying extreme compression, I was able to get it down to 50.29 MB, a reduction of close to half the original size. All the files I uploaded were processed quickly and I didn’t run into any limits in regards to how many times I could use the service. Note that you can only upload a single file at a time.

Files delete themselves automatically after about an hour, though there’s likely no reason that’d be a problem since you can just save the file back out to your system or the cloud. If you’re looking for greater control in an online PDF compressor, along with some impressive file size reductions, check out iLovePDF.

3. Free PDF Compressor

Platform: Windows

This lightweight compressor does what it says on the tin. Though it isn’t updated regularly, it works on Windows 10 and previous operating systems just fine. If the online tools are too basic for you, then this doesn’t offer a whole lot more, but it does mean you won’t have to rely on an Internet connection. If you’re looking for a deeper feature list, then you often have to turn to paid programs.

free pdf compressor

Nevertheless, Free PDF Compressor does give you the ability to use one of five presets to shrink your file down. Simply select your compression setting, point to the file path where the PDF lives on your system, where it should output, then you’re good to go.

The low resolution option is highly effective; though it obviously harms quality a fair bit, it impressively shrunk down a 50 MB file to 15 MB. And it works quickly too when processing, though I did find it to be occasionally sluggish when files entered the three digit file sizes.

4. PDF Compressor

Platform: Windows

If none of these tools are what you need, try checking out PDF Compressor. It’s very handy because it allows you to batch compress PDF Compressor: Batch Compress PDF Files Quickly To Save Space PDF Compressor: Batch Compress PDF Files Quickly To Save Space Read More , selecting from files and entire folders. Though the program hasn’t been updated for three years now, it’ll still runs as it should on Windows 10.

pdf compressor

The only caveat to PDF Compressor is that sometimes it can be really ineffective in its compression. A 50 MB PDF only lost just over 1.5 MB of its file size, which isn’t much to write home about. There are compression settings, but only in the paid version. But the program is included here because it can be effective, it processes very quickly, and the batch feature isn’t too be sniffed at.

Other File Size Reduction Methods

Compressing the PDF and altering its quality is one way to reduce the file size, but it’s not the only way. For example, you could remove pages Use PDFSam To Easily Split, Merge, & Reorder PDF Pages Use PDFSam To Easily Split, Merge, & Reorder PDF Pages PDFSam, short for “PDF Split and Merge,” is a great utility for quick PDF editing. You can combine multiple PDF documents into a single PDF document, split a PDF into multiple files, extract pages from... Read More or make use of an archive format like ZIP What’s The Best File Compression Method? MakeUseOf Tests Zip, RAR & More What’s The Best File Compression Method? MakeUseOf Tests Zip, RAR & More File compression is an important and common task users frequently ask of their computers. Reducing a file’s size makes it easier to email or place on a flash drive. It also reduces bandwidth usage and... Read More . For tips and advice on this and more, check out our guide on how to reduce PDF file size Compress PDFs & Reduce File Size With Free Windows Tools & Tricks Compress PDFs & Reduce File Size With Free Windows Tools & Tricks PDFs can be very large. If you ever need to compress a PDF file to email or upload it somewhere, you have multiple options. This article offers a summary. Read More .

On the other hand, if you’re after some more tools for compression or want those that perhaps offer more than just PDF compression, like a full-on image viewer, our four tools for PDF compression 4 Ways to Reduce the Size of a PDF File 4 Ways to Reduce the Size of a PDF File Are your PDF files too large to handle? Often, you can dramatically reduce the size of your PDF documents. We show you how you can shrink and compress PDF files. Read More article is available.

Do you often need to shrink your PDFs down? What free tool do you use to achieve this?

Image Credit: hand squeezing by Alexandru Nika via Shutterstock

  1. l3utterfish
    July 5, 2016 at 10:59 am

    Online. Pdfcompress.com

  2. Kelvin100WILLIAMS
    July 5, 2016 at 8:14 am

    THIS PDF REDUCER IS GOOD FOR ME

  3. BIJOY PRASAD
    July 5, 2016 at 3:33 am

    I had been using "pdf reducer" free version by orpalis it does a nice compression job.. Really worth giving a try

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