how to reduce size of pdf file in adobe reader 9

#How to reduce size of pdf file in adobe reader 9 how to
#How to reduce size of pdf file in adobe reader 9 full
#How to reduce size of pdf file in adobe reader 9 portable
#How to reduce size of pdf file in adobe reader 9 professional
#How to reduce size of pdf file in adobe reader 9 series

Note defaults to saving in Acrobat 1.6 format. Some improvement in areas of 3D, advanced commenting features, and security. Improved PDF Optimizer Interface again, broke out 'Discard User Data' into one pane, flatten form fields, combine and optimize files. Table 1: Acrobat Version Information Acrobat VersionĪdded interactions, movies/sounds, forms, CJK (Chinese, Japanese, Korean), web (hyperlinks, URLs, etc.), linearization for fast page displayĪdded structure, digital signatures, file embedding, JavaScript, RTL (Right to Left), color separations, Postscript Level 3 additions, uses opaque imaging modelĪdded JBIG2 compression, transparent imaging model, tagged PDF files (for standardized extraction of objects)Īdded Compress entire file, XFA Forms (XML)Īdded improved PDF Optimizer Interface, Path smoothing, Chopped image repair, Image enhancement (despeckle, etc.), can embed OpenType fonts

Acrobat will usually display (with a warning) a more recent PDF version, but new compression schemes will spawn an error when opened in older versions of Acrobat.

However, since over 90% of Acrobat users have version 5.0 or greater, using PDF 1.4 is a safer alternative. JBIG2 also compresses the entire table.Īcrobat 6 (PDF version 1.5) added the ability to compress the entire file ( Clean Up Settings dialog).

Like other dictionary-based algorithms (LZW, ZIP) JBIG2 creates a table of unique symbols and when a subsequent symbol matches one in the table, it substitutes a token pointing to the table index.

#How to reduce size of pdf file in adobe reader 9 full

JBIG2 (Joint Bilevel Image Experts Group) encodes compressed monochrome (1 bit per pixel) image data from 20:1 to 50:1 for pages full of text. Acrobat 5 (PDF version 1.4) added JBIG2 compression, which is superior to the CCITT or Zip algorithms when compressing scanned monochromatic copy (see Table 1). In general the higher the PDF version number, the smaller the file. The main factors in creating small PDFs are image resolution, image type (bitmap or vector), the number of fonts used and how they are embedded, PDF version, and the level of compression. It is in how well you use these compression techniques, how efficiently the data is described (including image resolution) and the complexity of the document (read number of fonts, forms, images, and multimedia) that ultimately determines how large your resulting PDF file will be.

CCITT (the facsimile standard, Group 3 or 4), run-length, and JBIG2 compression (PDF version 1.4) of monochrome images.

JPEG and JPEG2000 (PDF version 1.5) for lossy (or lossless for JPEG2000) compression of color and gray scale images.

LZW (Lempel-Ziv-Welch, see Minimize Bit Depth) and FLATE (ZIP, in PDF 1.2) for lossless compression of text and images.

PDFs use the following compression algorithms to reduce file size: PDF is a page description language, like PostScript but simplified with restricted functionality (no programming like PostScript) to be more lightweight.

#How to reduce size of pdf file in adobe reader 9 series

A PDF document is a collection of objects with structural information in a self-contained series of bytes. PDFs are an efficient way to accurately describe simple to intricate documents for screen or print output.

#How to reduce size of pdf file in adobe reader 9 portable

Portable Document Format (PDF) is the defacto file format for presenting device-independent documents on and off the Web.

#How to reduce size of pdf file in adobe reader 9 professional

We review Adobe's PDF Optimizer in Acrobat 8 Professional (pre-release) and Apago's PDF Enhancer 3.1. In this article we'll give you tips and tools to optimize PDFs for minimum file size while still maintaining accessibility and search engine visibility. Optimizing PDF files for the Web can significantly shrink their size and boost display speed, saving bandwidth and user frustration. Even PDFs designed for Web use can have a wait problem, weighed down with excess fonts, change histories, and unoptimized images and forms. While PDFs have become quite popular on the Web, many PDFs used in web sites are designed for high quality print output and are not optimized for the Web. PDF optimization is often overlooked when creating PDF files for the Web.

#How to reduce size of pdf file in adobe reader 9 how to

Learn how to use PDF optimization tools to remove redundancies, subset and outline fonts, and compress text and images for faster downloads and higher user satisfaction. The new Acrobat features faster operations, smaller PDFs, a new interface, and the ability to combine different types of files into one PDF. Summary: We review Acrobat 8 Professional (pre-release) and PDF Enhancer 3.1 for optimizing PDF files.