Portable Document Format (PDF) is a platform-independent standard developed by Adobe System in 1993 for document exchange.

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76
votes
16answers
108k views

How to compare the differences between two PDF files on Windows?

Do you know a good Windows software to compare PDF files side-by-side and show the modifications between the two? It would be great if you can post both free and not-free products.
51
votes
10answers
59k views

Combine/merge PDF files in Windows? [closed]

Is there a painless way to combine/merge PDF files in Windows? I understand that pdftk will do it on Linux.
40
votes
14answers
2k views

PDF Viewer on Windows

I've tried Foxit and Adobe's reader, but I'm not satisfied with either. Foxit has update nagging for non-critical junk. Adobe PDF reader is bloatware. Are there other options you people like?
40
votes
8answers
33k views

Stop PDFs from displaying inside Google Chrome

When I click on a PDF link in Chrome, it opens automatically inside the browser window. How can I get it to download instead and open with an external viewer? Update: I implemented djhowell's ...
38
votes
2answers
38k views

Export PowerPoint to PDF with each animation on a separate slide

I have a PowerPoint presentation where I extensively use simple animations, only appear/disappear effects triggered by the mouse (not time based), without any smooth transitions. Is it possible to ...
34
votes
8answers
31k views

How to convert a PDF document to PNG?

Looking for a free way to convert a PDF document to an image.
32
votes
17answers
3k views

How to print documents to pdf [closed]

I like to print PDFs of my documents. I've been using PDFCreator. Is this a good choice, are there any better solutions?
26
votes
7answers
4k views

Stop Microsoft Word 2010 from smoothing screenshots?

When I insert JPEG screenshots into Microsoft Word, it smoothes them instead of preserving the original pixels from the bitmap. When I then print to PDF (using Acrobat Distiller), depending on my ...
24
votes
12answers
56k views

How to know which fonts are used in selected part of a PDF document

I'm using Foxit Reader as default PDF viewer. How can I see what type of font is used for a selected part of a PDF document? (If this can only be done with another software, I'd prefer a freeware as ...
24
votes
3answers
7k views

Make Chrome always open PDFs itself

I'm looking for a way to make Google Chrome always open PDFs with its internal viewer when I click a link, as opposed to downloading it to the default location. It works with most URLs, but some ...
23
votes
9answers
49k views

How to convert Word (doc) to PDF in linux?

I have a set of files in .doc format, that need to be converted to .pdf format. I am using Ubuntu linux.
22
votes
5answers
11k views

How to extract image from PDF file

I currently use Foxit's PDF reader, and I recently downloaded an image from the Internet, but it is inside a PDF file. How do I extract this image? Operating system is Windows 7.
21
votes
8answers
30k views

How to extract text with OCR from a PDF on Linux?

How do I extract text from a PDF that wasn't built with an index? It's all text, but I can't search or select anything. I'm running Kubuntu, and Okular doesn't have this feature.
20
votes
10answers
4k views

Free PDF Editor for Windows [closed]

I have some PDF files that I need to change/edit, not view. I'm running on Windows. What is the best package to get this for free (either freeware or opensource, not trial/shareware)?
19
votes
3answers
12k views

Back button of Adobe PDF Reader after clicking a hyperlink whose target is on the same document

PDF documents have hyperlinks to the contents on the same document (analogous to "#section" hrefs for an HTML document). Where's the back button to go back to the page I was on (where I clicked the ...
19
votes
6answers
3k views

Convert PDF to Word document? [closed]

Any software/idea how to convert pdf document to word document?
18
votes
3answers
9k views

Convert a PDF to greyscale on the command line in FLOSS?

I have a colour PDF file, and I'm going to print it out and then photocopy it in black and white. I'd like to know what it's like in B&W before photocopying it. Is it possible to 'greyscale' a PDF ...
18
votes
9answers
35k views

Can't copy text from a pdf file

I am using foxit PDF reader to view my text book. I would like to copy the text from the pdf file into a word document but it won't let me. I can select the text fine but the option to copy text is ...
17
votes
9answers
50k views

Batch-convert Word-documents to PDF's (free)

Is there free a way to batch-convert many Word-docs - and just have them saved as [originalfilename].pdf?
17
votes
3answers
14k views

How can I fix/repair a corrupted PDF file?

Does anyone have any recommendation or procedures for repairing a corrupt PDF? When I open the file I get "There was an error opening this document. the file is damaged and cannot be repaired." ...
17
votes
3answers
31k views

Is there any PDF to Mobi converter?

I'm looking for a free converter from Pdf to Mobi, for reading on a Nokia E71; I find more confortable to read on this format, but i'm open to other solutions. What are the alternatives that I have?
17
votes
8answers
19k views

Looking for simple windows scan (multiple pages) to one pdf application?

I would like to find some simple scan software for a windows machine that can scan to pdf, but I would like it to do batch or multiple pages into one big pdf. I saw a couple questions on scan to pdf ...
17
votes
5answers
4k views

search PDFs with non-standard character encodings

Some PDF files produce garbage ("mojibake") when you copy text (even though they render OK). This makes it impossible to search them (whatever you search for will not match the garbage). Does anyone ...
16
votes
13answers
120k views

How to save a rotated Adobe PDF file

I received an Adobe PDF scan of a document that displays upside-down. I rotated it inside Adobe Acrobat and chose Save As to make a new document, however, the rotation is not saved and when I open ...
16
votes
7answers
79k views

How to remove security from a PDF file?

I am trying to fill out some docs, but the provided PDFs are "SECURED", meaning I can't use FoxIt's typewriter tools. Is there any way to remove the security?
16
votes
3answers
10k views

How can I split a PDF's pages down the middle?

Does anyone know of a good way to split a pdf's pages down the middle into two new pages? To be clear, I'm not trying to split out already existing pages from a pdf; I am trying to create two new ...
16
votes
2answers
14k views

Windows 7 x64 Pro not indexing PDF content?

In an attemp to get rid of all the paper clutter that I receive each day, I started scanning and ORCing all my important documents last year. I was using Windows Desktop Search on Vista to index my ...
16
votes
1answer
7k views

Scan-to-PDF software for Linux?

I have a workflow whereby I scan paper documents into searchable PDFs using a Fujitsu ScanSnap S500 document scanner. I am not a great fan of the bundled software, but it's dead simple to use: place a ...
16
votes
5answers
1k views

How to change internal page numbers in the meta data of a PDF?

I have a pdf document I created through non-Acrobat means (printing to pdf, then merging a bunch of pdfs), but I'd like to manually change the page numbers (i.e. the first several pages are simply ...
15
votes
2answers
8k views

adobe acrobat reader - how to save your place?

I'm trying to read an ebook in adobe acrobat reader and I want to save the position I'm at between computer reboots / closing reader. How can I save the page I'm at, or even better auto save? Is ...
15
votes
1answer
15k views

Two-page view in full screen for Adobe Acrobat

Since i'm using a wide screen, i want to view two page in full screen while reading PDF. I can view two page in Reading Mode or normal view. however, whenever i switch to full screen mode, acrobat ...
15
votes
7answers
49k views

How to crop permanently in Acrobat?

After cropping anything by using the crop tool in Adobe Acrobat, how do I ensure that the cropped area is fixed and can't be seen even when I increase the crop margin? For example: how would I crop ...
15
votes
1answer
516 views

How do I reduce a PDF's size and preserve the bookmarks?

I have a ~259 MB PDF. I did pdf2ps and ps2pdf. The final size was 45 MB. I don't see any visible difference in quality in any reader. Although, the bookmarks were lost. I tried using pdftk, but it ...
15
votes
5answers
45k views

How to open pdf in Chrome's integrated viewer without downloading it

So I was really excited about the new integrated pdf viewer in chrome. However when I click on a pdf file link, chrome offers to download it instead of opening it inside its viewer. How do i get it ...
15
votes
1answer
3k views

How do I automatically convert academic papers (PDF) for reading on a Kindle?

I got a Kindle for Christmas and I'd like to read some academic papers on it. Almost all of those papers are in either PostScript or the PDF format and made for A4-sized paper. See the example here. ...
15
votes
9answers
36k views

How can I sign a PDF document quickly and cheaply?

I need to sign a PDF document. However, Adobe Reader does not let me sign documents. I just need to sign the document, not edit it. Do I need to buy the full Acrobat software? Or is there a better, ...
14
votes
12answers
46k views

How do I save an image PDF file as an image?

I have a PDF that contains a scan image of a document. I want to save the contents of this PDF as an image so that I can then run it through an OCR program that only accepts .jpg, .png, and .gif type ...
14
votes
1answer
6k views

Acrobat Reader & saving last page I read?

I like to read eBooks, but I tend to have a hard time keeping track on which page I am in which file. Is there a bookmark function or something similar that I'm not aware of?
14
votes
8answers
20k views

How can I convert scanned images as PDF to a searchable PDF file?

I have a PDF of a scanned book. I'm looking for a free software that will perform OCR and then provide an option to save it as a PDF or document again. Is there one?
14
votes
4answers
6k views

Ubuntu: Is there a good tabbed PDF viewer? [closed]

Is there a good non-bloated PDF viewer for (Ubuntu) Linux that supports tabs? I don't want to use Acrobat Reader because it is slow and takes much memory, and my computer isn't the fastest. I know ...
13
votes
1answer
8k views

How to extract vectors from a PDF file?

I have a PDF file with vector images inside it. (I downloaded it from the internet, so I do not have any originals.) I wish to extract the vectors so that I can overlay them on some other images; use ...
13
votes
3answers
4k views

Why poor display quality in all PDF readers except those from Adobe?

When I read PDF files with Adobe Reader or Adobe Acrobat Pro, the display quality is superb. However, for the same files, other PDF readers like Foxit Reader, Sumatra PDF Reader, etc show poor ...
13
votes
10answers
90k views

Adjust PDF Contrast with Adobe Reader/Acrobat?

We get PDF's from our professor to read for homework but they're often scanned documents, is there a way to adjust the contrast of the text to make it easier to read? Edit: I've got Photoshop but is ...
13
votes
11answers
32k views

PDF has garbled text when copy pasting

I'm trying to copy and paste text from a PDF file. However, whenever I paste the original text it is a huge mess of garbled characters. The text looks like the following (this is just one small ...
12
votes
3answers
7k views

Stitch multiple PDF's together

I am looking to stitch together multiple PDF's together into one file. Is there a program/way (open source prefered) that can do this for me with little hassle? If you share a program please give ...
12
votes
1answer
1k views

Generate a PDF from a CHM

I have seen many questions about PDF printers around, and I am already using a PDF printer (Bullzip PDF printer). But I can't use a PDF printer to print entire CHM files to PDF. I am using the ...
11
votes
5answers
6k views

How to open 2 Adobe Reader instances?

I would like to see simultaneously pages in the beginning of the document and at the end. I can do that by opening the same document on different windows. But when I try to do so, the first instance ...
11
votes
5answers
41k views

How can I create a PDF from scanned images I have in my folder? [closed]

I want something simple. I have a folder with 10 images and I would like to grab all of them, place each in a single "page" and into a single pdf file. Is there a simple GUI-based software for this? ...
11
votes
4answers
10k views

How to batch combine JPEG's from folders into PDF's

I have a about 500 folders with images inside. Is there a way I could batch convert this so that I get .pdf files that contain all images inside as pages? EDIT: There should be 500 PDF's created, ...
11
votes
4answers
22k views

How do I convert a DjVu document to PDF in Linux using only command line tools?

I've got some documents in DjVu which I'll like convert to PDF. Is there a way to do this using command line OSS tools?