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  1. #1
    Platinum Lounger
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    Free PDF Compressor

    Free PDF Compressor
    <img src=/S/free.gif border=0 alt=free width=30 height=15>ware 288KB - single executable file, Version 1.12

    Compress PDF file and reduce the actual size of PDF document with this completely free PDF Compressor.
    Free PDF Compressor removes duplicate PDF objects, optionally takes advantage of new compression features of latest PDF specifications that for many classes of documents compresses 30 - 60% better than what is possible in PDF 1.5.

    Free PDF Compressor allows you to shrink PDF file by using Flate or RunLength compression algorithm. With this freeware, you are able to set the compression level to generate PDF files of smallest size.

    Another benefit of this freeware utility is that you can decompress or expand any PDF file to its original size for better conversion from PDF to other formats.

    Seems to work as advertised with the PDFs I've "fed" it.

    Alan

  2. #2
    Super Moderator jscher2000's Avatar
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    Re: Free PDF Compressor

    Looking at the table listed for the last product (version converter), it sounds as though the compressed files might only be compatible with Adobe Reader 7. Did you try the compressed files in versions 5.x or 6.x?

  3. #3
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    Re: Free PDF Compressor

    Yep <img src=/S/yep.gif border=0 alt=yep width=15 height=15> I only run v.5.x (in keeping with always staying a decade behind <img src=/S/grin.gif border=0 alt=grin width=15 height=15>) and tried a variety of source PDFs, back to version 2.x. Didn't encounter a problem.

    Alan

  4. #4
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    Re: Free PDF Compressor

    I tried it on an 8-page PDF, and one specific pair of options (which included Maximum Compression) expanded the PDF from 268 KB to 846 KB!

    Possibly a pathological case...?

    John
    <font face="Script MT Bold"><font color=blue><big><big>John</big></big></font color=blue></font face=script>

    Ita, esto, quidcumque...

  5. #5
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    Re: Free PDF Compressor

    I shrunk a 60 MB file down to 20 MB, so I'm sold!

    Probably not a whole lot of need to compress a 268 KB file...

  6. #6
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    Re: Free PDF Compressor

    I tried it with several PDFs, comparing this program with the compression option in Adobe Acrobat 7.

    For the files that I tried Adobe Acrobat produced smaller files but the difference between file sizes of the compressed files was quite small. I did find one file that Adobe successfully compressed but PDF Compressor threw up an error and was unable to compress.

    Overall I would say that PDF Compressor does a good job at compressing files.

  7. #7
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    Re: Free PDF Compressor

    From the track record so far in this thread, I'd say it's a reflection of the old story. Adobe and a few other programs seem to produce small PDFs in the first place, and it would seem that attempts to compress them are generally not worth it. Other programs e.g. some of the virtual printer drivers, can produce inordinately large PDFs from the same source. I'm guessing that these are probably the "good" candidates for compression, because they contain lots of "extra"/ superfluous stuff, that can be removed without degrading the rendering of the PDF.

    Just a hunch, but this seems to be the kind of behaviour I've observed for PDFs generated by a variety of methods/ programs.

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    Alan

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    Re: Free PDF Compressor

    The file size of uncompressed PDFs at work is scary. Most ended up being 4 - 5 times the original size. I did not know that the originals were compressed but I suppose they were.

    Joe
    Joe

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    Re: Free PDF Compressor

    I'm certainly no expert on the file structure of PDFs Joe, but I do know that some of the issues that blow their sizes out are associated with the resolution(s) selected and (especially) the fonts that might be embedded. Planet PDF - Reducing PDF File Size gives a rundown on the typical file components that contribute to the overall size, and how the Adobe products can reduce it.

    Alan

  10. #10
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    Re: Free PDF Compressor

    Hi Alan,

    Would you please confirm how this program works. I tried running it and after loading up a file and selecting the radio buttons I pressed compress. A dialogue box came up - looked like it was asking me to choose a file name to save the compressed file to - the file name area was blank and the program exited before I could do anything. It doesn't seem to have changed the PDF file I was testing.

    Thanks,

    Chris (Hunt)

  11. #11
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    Re: Free PDF Compressor

    " it was asking me to choose a file name to save the compressed file to - the file name area was blank" - It is asking you to choose a name/location for the compressed file. It is not supposed to do anything until you click the save button in this dialog.

    I just tested this.

    I have been given some pdf's to put on a website. One seemed pretty large at 2,677KB so I first opened in Acrobat and used SaveAs to see what happened. Final size 2,677KB!

    I then tried pdf compressor: final size 2,681KB.
    Regards
    John



  12. #12
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    Re: Free PDF Compressor

    I've given up on this program. Apart from the problem with it quitting before I could chose a location/file name it doesn't seem to help with reducing the sizes of my PDFs which are mainly made using CorelDraw12. A pity.

    Chris (Hunt)

  13. #13
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    Re: Free PDF Compressor

    So did I. It not only failed to reduce my PDFs' sizes noticeably, but on most occasions it also increased them.
    <img src=/w3timages/blue3line.gif width=33% height=2>
    <img src=/S/flags/Argentina.gif border=0 alt=Argentina width=30 height=18> <big><font color=4682b4><font face="Comic Sans MS">Diegol</font face=comic></font color=4682b4> </big>

  14. #14
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    Re: Free PDF Compressor

    Chris (and John & Diegol)

    I've just had a more extensive play with this and find results to vary widely. There appears to be a consistentcy with the PDF source though. PDFs from apps that seem to produce inordinately large files in the first place seem to compress quite significantly. Others can even show an increase in file size. I think it's important to know exactly what you're trying to compress - just like with ordinary file compression. If you try to zip a zip file, the filesize will probably show the same sort of slight increase. I guess it would also help us if we new exactly what this "compression" process involved.

    I'm keeping this prog myself, possibly using it for individual cases, on a "try it and see" basis.

    Alan

  15. #15
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    Re: Free PDF Compressor

    Alan, you are probably right!

    An example from http://www.shanzcan.com/photoshop/PDFforma...ypetoshape.html:

    1. Adobe PDF format (JPEG 10) = 2.8MB
    2. Adobe PDF format (ZIP) = 3.1MB
    3. Native PSD format = 3.4MB

    Some explanation from http://www.creativepro.com/story/feature/18736.html:

    The difference between InDesign PDF, Illustrator PDF, Photoshop PDF, and Acrobat Distiller PDF

    (...)For example, the Adobe Color Engine (ACE) allows Adobe applications to display color the same way. This ensures that blue in Adobe Photoshop is blue in Adobe Illustrator, and blue in Adobe InDesign. Another example of this shared technology is the Adobe Graphics Manager, wh ich allows Adobe applications to display graphics and images with stunning quality both on screen and in print.

    In contrast, Acrobat and Distiller use the PostScript language to PDF conversion path to create Adobe PDF documents. Adobe PageMaker and Adobe FrameMaker both use Distiller to create Adobe PDF files. Any application that can generate PostScript can use Distiller to convert PostScript to PDF.

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