How to optimize the size of a pdf file

To do so, choose Unembed Fonts to remove embedded fonts. Images — like any other file, images tend to add to overall file PDF size. You can also select from downsampling, subsampling and bicubic downsampling to make them smaller. What is rescaling and what do the options mean?

Downsampling averages pixels within a sample area. The average pixel value is then assigned to the entire pixel area. Subsampling chooses the center pixel value within a sample area, then assigns it to the entire sample area. You should only use it for things like charts.

Bicubic Downsampling. Bicubic downsampling uses a weighted average within a given area to determine pixel value. With this type of downsampling, all pixels are compared and averaged to the center pixel. The new pixel is an average of these neighboring pixels.

It takes the longest to process but yields the best results. You can discard objects created in Acrobat and in other applications. Selecting an object removes all occurrences of that object within the PDF. In the Discard Objects area, you can select from these and other options:.

Disables all actions related to submitting or importing form data, and resets form fields. This option retains form objects to which actions are linked. Flatten Form Fields. Makes form fields unusable with no change to their appearance. Form data is merged with the page to become page content. Discard All JavaScript Actions. Discard All Alternate Images.

Removes all versions of an image except the one destined for on-screen viewing. Some PDFs include multiple versions of the same image for different purposes, such as low-resolution on-screen viewing and high-resolution printing.

Discard Embedded Page Thumbnails. Removes embedded page thumbnails. This is useful for large documents, which can take a long time to draw page thumbnails after you click the Page Thumbnails button.

Discard Document Tags. Removes tags from the document, which also removes the accessibility and reflow capabilities for the text. Convert Smooth Lines To Curves. Reduces the number of control points used to build curves in CAD drawings, which result in smaller PDF files and faster on-screen rendering.

Detect And Merge Image Fragments. Looks for images or masks that are fragmented into thin slices and tries to merge the slices into a single image or mask. Discard Embedded Print Settings.

Discard Embedded Search Index. Discard Bookmarks. Removes information in the document information dictionary and all metadata streams.

Removes all file attachments, including attachments added to the PDF as comments. Removes links to other documents. Links that jump to other locations within the PDF are not removed. Strips information from a PDF document that is useful only to the application that created the document. This does not affect the functionality of the PDF, but it does decrease the file size. Decreases file size. The options in the Clean Up panel of the PDF Optimizer dialog box allow you to remove useless items from the document.

These items include elements that are obsolete or unnecessary for your intended use of the document. Removing certain elements can seriously affect the functionality of the PDF. By default, only elements that do not affect functionality are selected. If you are unsure of the implications of removing other options, use the default selections.

Object Compression Options. Discard Invalid Bookmarks. Discard Invalid Links. Discard Unreferenced Named Destinations. Removes named destinations that are not being referenced internally from within the PDF document.

Because this option does not check for links from other PDF files or websites, it does not fit in some workflows. PDFelement is an advanced PDF reader and editing tool that is loaded with a plethora of powerful features. Some of the most important features of PDFelement are mentioned below. It has even more wonderful features and it is a must-have tool for your business and educational needs.

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