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Online and Offline Methods to Reduce PDF File Size

PDFs have been one of the most preferred document format from quite some time. Thanks to Kindle and other e-book readers, text books can be easily converted into PDFs. However, the issue here is the fact that Kindle comes with a rather limited memory and this bottleneck will come in your way if you try to squeeze in many files. Thankfully PDF can be optimized and compressed so that it wont leech on our precious memory space.

PDF_optimisation_feature

Before we start listing out the ways to make a PDF smaller, we would like to address one of the larger concerns here. Many academicians and researchers are shying away from online PDF tools wary of the chances that the files might be stored in the server while being converted. If the file is indexed in any of the sites, it will be flagged down under plagiarism. If your PDF file contains precious information, we would suggest you to go for an offline tool which would not require the users to upload the files on the servers. We have curated the tools categorically under online and offline sections so that you can zero in on something that suits you the best.

Offline Tools to compress PDF file size

1. Nitro PDF

This is one of the oldest PDF tools we have been using and it sure performs at par with the claims. Nitro PDF is mainly advertised as a PDF creator tool but at the same time it can also be used to compress the PDF files. Nitro PDF is available for free trial and can be downloaded here, and once downloaded you will have to install it just like any traditional program files.

Primo_1

Nitro PDF installs a PDF printer into your system that will let users download PDF files instead of printing them a.k.a virtual printer. All you need to do is open up PDF in any reader and select “Print” option from the “File” menu, instead of selecting a normal printer you need to select Nitro PDF as your printing device from the drop down.

Primo_2

The rate of compression can be decided by selecting the Screen Quality options, in case you select higher quality option than the chances are that the converted PDF file will be larger, Select the Print option and this step will prompt you with a “Save as”option along with option to save your work in the desired location.

Original Size – 9.68 MB.

< em >File Size After optimization in default setting – 6.47 MB.

2. Using Microsoft Word

Microsoft Word is one of the most widely used word processors that can also compress a PDF file with a little trick. This method to optimize PDF is convenient, simple and hassle free without any need to install third party software. Microsoft Word 2010 natively supports PDF files and in Microsoft Word 2007 an extra plugin is required.

Doc_PDF_1

Select the PDF file to be optimized and open it with Microsoft Word by using the “Open with” program feature. If the PDF file has been downloaded from Internet Word will ask for permissions to edit.

Doc_PDF_2

All you need to do now is go to “Save As” option from the File menu and select the format as PDF. Additionally users can also point out at the desired destination of the file. On the lower left side of the dialog box there is an option called “Optimize for”. The optimizing option had two levels, Standard for well balanced optimization and minimal reduction on the quality front and Minimum size for a high rate of compression and heavy loss on the quality front. The Standard optimization should work out for most of the situation and the loss in image quality didn’t seem out of the phase.



Minimum size is best suited for text only PDF files and a scenario wherein we are not bothered about the quality of the images and tables in the file. That being said this method of optimizing PDF files by using Microsoft Word takes time and it also sometimes meddles with the formatting of the original document.

Original Size – 9.68MB.

File Size After optimization in default setting – 6.58MB.

3. Using File compressors

We agree that this is a rather crude way of reducing the PDF size but at the same time it is one of the easiest methods to get around the optimization process. WinRar and WinZip are two popular programs that will help you compress multiple PDF files in a single go.

WinRar_Compress

Select the PDF files you want to compress, right click and choose “Send to” option. Now select Zip and this will take you to a page with several options to optimize. Choose “Best” from the “Compression method” drop down. Zip might be the most easily available resource to compress PDF files but on the contrary the compression rate is not that great and we would on any day suggest you WinRar over Zip although the latter costs money after the 40-days free evaluation.

Original Size – 9.68MB.

File Size After optimization in default setting – 7.2MB

WinRar is more of a safe archiver tool and in spite of toggling the compression settings to max we couldn’t reduce the size to a greater extent. If you are interested in reducing the PDF size other file compression tools like 7-Zip and KGB archiver.

Online Methods to Reduce PDF file size

1. Small PDF online tool

PDF_Optimiser_smallpdf

Online PDF compressors are not only easy to use but they are also less resource hogging then the offline ones. Unlike other online tools which put a limit over the size of file and the frequency of usage, SmallPDF is free to use any number of times. Just drag and drop the file into the box and wait till the tool is done with compression. You can click on “Download File Now” option to download the file to your system and also let the browser know where you want to save the optimized version.

PDF_SmallPDF_2

Original Size – 9.68MB.

File Size After optimization in default setting – 2.42MB

The downside of SmallPDF is that it will not be able to downsize pre-optimized PDF files and this will result in excluding some files from the compression process.

2. PDF Compress

PDF_Compress

Another online tool that promises to automatically optimize the PDF files online and at the same instance maintain the product quality, is the PDF Compress. Just like in Small PDF you can drag and drop a file but PDF Compress also boasts of integration with Google Drive and Dropbox.

Original Size – 9.68MB.

File Size After optimization in default setting – 1.48MB

Once you drop the PDF file hit “Compress!” and then you can download the optimised copy. Their is no cap on the number of times PDF compressor can be used however the maximum file size is restricted to 200MB.

3. Using OS X preview

This method is not entirely online but since it is usually used to shrink the bulged PDF received from the email we put it here. If you have set “Always open with Preview” then the PDF will automatically open in a preview mode, if not then you need to drag and drop the file onto the preview icon situated in the dock.

PDF_Mac_OSX_preview_2

Click on file and select the “Export” option and further select “Reduce File Size”. After reducing the file size select the location where you want to save the file and there you go!

PDF_Mac_OSX_preview_1

P.S: This method is best suited for situations where image quality is not a concern but file size is.

As you might have already witnessed, PDF converters are in plenty and we have handpicked only a few of them which have worked out for us. The fact that any sort of compression is going to impact on the quality or the formatting of the files is something we should keep in mind.


© Raju PP for Technology Personalized, 2015. This Feed is for personal non-commercial use only. If you are not reading this material in your news aggregator, the site you are looking at is guilty of copyright infringement. Please contact us, so we can take legal action immediately. If you are on Twitter you can follow me @rajupp! | Permalink |

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