You can check the list of fonts used in your PDF and also whether they are embedded or subsetted using Adobe Reader. This can reduce the file size but will also mean that editing of the file in the future will require the fonts to be loaded on the host machine. If you have seen that Fonts are a big factor of your PDF file size then your best option in most cases will be to subset the fonts in the PDF which will remove any unused characters from the embedded font set. If a document has multiple fonts or double-byte fonts this can mean the file size increases by many megabytes. However, embedding the fonts comes at a cost of increasing file size. Even if the host machine does not have the fonts installed this will guarantee the fonts display correctly and the document’s layout remains as the editor intended. If you want to ensure fonts look the same on every device that the PDF can be shown it is a great idea to embed the fonts. It’s very easy and we show you how to do it in this support article. The main one is to try and reprint the PDF using a browser PDF printer and then use a PDF compressor to reduce the size of the resulting file. However, there are workarounds to compress the size of PDF files made from content streams. Unlike images which can be resized or recompressed with a more optimal quality to reduce them in size, content streams tend to be large and cannot be directly compressed. The problem is that because all of the content is stored in a ‘Stream’ of data there is no real way of identifying which piece of content is driving up the file size. When content streams are used, a page in a PDF document has one or more content stream parts that together contain all the PDF page description commands for the page. These are essentially the contents of the pages - the text and any line drawings. Most applications make use of image and text markup to create PDF content items, however, some applications create PDFs that use Content Streams. This is the save PDF dialog in Photoshop for example, which may have a preset for smallest size, but you are looking for compression options including downsampling images as highlighted below. However, if the file was created in another application and you have access to the source file, then your best option might be to save a new PDF from the source and check for options to downsample the images. These tools are designed to compress PDF files quickly and simply by automatically resizing images, optimizing image formats and adjusting quality levels while removing background or hidden data that isn't needed for normal use of the file.Įxtracting images from a PDF file to hand optimize them is not really a practical option, hence the suggestion to use a compressor. In this case the best option is to use a PDF Compressor like NXPowerLite Desktop. You may be able to tell just by looking at the document that it’s full of large full-colour images and know they are likely to blame for the file size. The online PDF file analyzer from WeCompress will show you a breakdown of the content in your PDF file: Helpfully, there is a free tool that lets you see exactly why YOUR pdf is so large > artwork for postersĮMBEDDED FILES/FILE ATTACHMENTS - it’s possible to attach many types of files to a PDF and these files are stored inside the PDF contributing to its total size.įind out what is making your PDF file big PIECE INFORMATION - extra data saved inside the PDF file, by applications like Adobe Illustrator, Photoshop etc.ĬONTENT STREAMS - PDF files created with the text, layout and images all combined together into impenetrable content streamsĮMBEDDED FONTS - some fonts can be surprisingly large. LARGE IMAGES - obvious, but not always as easy to spot as you might think Because when you know that, you can use the right tool for the job and just get on with your day. So it’s important to start with a clear understanding of the type of content that is currently lurking in your PDF file. Starting with why…īefore we dive in, it’s worth noting that there are many, many reasons why PDF files can end up so big, and there are lots of different tools and approaches that can be used to downsize them. So today we are going to show you how to figure out exactly what is making your PDF file so heavy - and give you some tools and techniques for reducing its file size. Well, we love finding out what makes files big and all the many ways they can be made small again. Maybe you don’t know why it is big or perhaps you don’t have the tools to fix it. Do you have a big PDF file? We love big PDF files! It’s kind of our thing.
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