Questions tagged [pdf]

The Portable Document Format (PDF) is an ISO standard electronic file-format. Question about PDF can be about reading, converting, creating and editing such files.

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1answer
203 views

is PDF not considered as an ebook format

I had a debate with my colleagues over PDF as an eBook format. I maintain, that eBook is defined as any book that is digitized, and that epub or other HTML based eBook rendering is just a type of ...
5
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4answers
271 views

Can you suggest an advanced ereader application for textbooks?

I need an ereader application that can be effectively used with textbooks; it should support features like note taking, searching, highlighting, and organizing books of any format (EPUB, PDF). What ...
4
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3answers
6k views

How convert multi-column PDF files to readable PDF in 6 inches display devices?

What is the best way to convert multi-column PDF file into readable format in a 6 inch display devices like kindle?
4
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1answer
890 views

How can I use pdftk to make changes to my PDF ebooks?

There are answers by asalamon74 (here), and by anthon (here, here and here), that use pdftk. I don't think I have pdftk installed on my ebook reader¹. How and where do I install it, and once ...
4
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1answer
202 views

Can a PDF run scripts or code?

Can a PDF run JavaScript? If yes what are the limitations of running scripts in a PDF when compared to a browser? Can it do network requests using JS? Can it run other types of scripts? Is ...
4
votes
2answers
94 views

Ereader that won't blur pdfs

I have the 2015 Kindle Wi-fi Touch. It's great, although when I try to read PDFs on it, it blurs them. I don't have a problem with small fonts, and I realise that ereaders are never going to be ...
4
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1answer
1k views

What kind of k2pdfopt optimizations should I be using for these sample pages of a PDF?

I have a bunch of PDF files that follow this kind of layout: When I use k2pdfopt with options -dev kp3 -fc -j -1 -jf -1 0.75 -n- -wrap -hy -ws -0.2, I get this: As you can see the text gets mangled ...
4
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1answer
139 views

How to best read a PDF on Kindle?

Interested in reliable ways of converting, specifically, PDF files for reading on a Kindle. See also: https://stackoverflow.com/q/5429242/262852 Not looking for a steep learning curve, something ...
4
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2answers
568 views

Sending data automatically to a server from a PDF document

Is there any way to send directly data from a PDF document back to a server? I would like to collect data from readers of an ebook, preferably more or less automatically (with their full consent of ...
4
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1answer
992 views

Can I increase the volume of *Read out Loud* in my Adobe Reader?

I have Adobe Reader V 10.1.8 on my laptop and it has a Read Out Loud feature that reads the text in the e-book. The problem is that the volume is too low to hear what the reader is reading. Even with ...
4
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2answers
439 views

Alternative to Kobo to solve line wrapping problem

I was given a Kobo as a gift. I like the idea of reading a book on an electronic device because I'd like to be able to click and see a definition of a word that I'm not familiar with, rather than ...
4
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2answers
3k views

How to convert this chm file to pdf?

I want to convert a chm file to a pdf file. Calibre's command ebook-convert only converts the first 7 pages of the chm file into a pdf file, while the chm file has much more pages. How can I convert ...
4
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1answer
73 views

Identify if a PDF document is digital native

Is it possible to know if a given PDF is digital native or has gone through some kind OCR or digitization process. If yes, is it possible to do so programmatically?
4
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2answers
2k views

How do I easily convert and send PDFs to a Nook GlowLight or SimpleTouch's native format

Amazon makes it easy to convert PDFs and send to Kindle in the Kindle's native format. How to do this (simply!) on a Nook? I do know conversion is possible with tools such as Calibre but I was ...
4
votes
1answer
1k views

How do I have Calibre automatically create a cover image from a non-ebook file?

I am an RPG publisher and use Calibre to maintain my research library (PDF, mostly) and my stock art library (various image files). When I load a PDF, Calibre automatically creates a cover image ...
3
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3answers
87 views

Is there any tool I can use to examine the differences between two OCR pdfs?

I have pdf's to two solutions manuals for a textbook, and I'm trying to determine how much they differ by analyzing both copies with some sort of tool. Does such a thing exist? Is there any other way ...
3
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2answers
40 views

How to bundle 5 PDF ebooks into 1 file for download

How to bundle 5 PDF ebooks into 1 file for download I have 5 PDF eBooks that I sell I want to have these 5 PDF file into 1 file
3
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2answers
2k views

How to convert a html ebook to a pdf file?

Is there some program which can convert a html ebook (consisting of many html files located under different directories and linked to each other) to a pdf file? For example, some shell scripting (e.g. ...
3
votes
2answers
62 views

Calibre fails to unwrap Georgian text

I am trying to use the calibre conversion feature to convert ebook written in Georgian from PDF to Mobi. The effect is however very poor. Someone in 10 lines gets unwrapped. I tried to use different ...
3
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1answer
159 views

Using K2pdfopt to prepare a document for printing

Can I use K2pdfopt to take a PDF, crop it to the tightest bounding box, and generate a new PDF with 2 consecutive (portrait) pages set side-by-side on the same (landscape) page such that they are ...
3
votes
1answer
159 views

Adding Video links to an ebook

I am new to ebooks and am not really sure of the capabilities of the system. I have written a number of technical books which I was considering turning into video lectures. Now I think it would be ...
3
votes
1answer
833 views

Calibre - keep personal folder format

I have spent the last few days manually organizing my ebook collection into folders and sub-folders. When I load everything into Calibre, everything gets changed from the title to the way its saved in ...
3
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1answer
288 views

How to stamp text to PDF, with a twist

The closest case I came across in this site is this question: How can I personalize each copy of a PDF to add the reader's name or email address to each page? However, I need something more ...
3
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2answers
849 views

How to convert Kindle format (.mobi or .azw) with annotations to PDF?

I'm looking for a way to convert a Kindle book, with several annotations in it, to PDF format, so that my annotations are also saved in the PDF file. Converting from .mobi or .azw to PDF seems pretty ...
2
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2answers
3k views

PDF vs DjVu benefits and disadvantages

What's the point of these two ebook formats? The quality and file size of the ebooks tend to be near identical and ereaders for these aren't exotic at all. Why would you choose one over the other?
2
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2answers
64 views

Scan epub and pdf to ascertain absence of malware

Is it possible to verify the absence of malware in epub and pdf files?. I'm using a MacBook Air, macOS Catalina, and iPad mini iOS 13. What program can I use?
2
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2answers
93 views

how to export images using abbyfine reader?

Presently, I using the abbyfine reader for text extraction. Is there a way to export the images from abbyfine reader software? Please advise.
2
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1answer
71 views

Recommend a new e-book reader, main need is highlight and add notes to my books

I have an e-book reader ( in fact it is a gift) Kobo aura. The problem I faced with this e-book is that I am not able to highlight in pdf files, nor add some notes to my pdf books as in adobe ...
2
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1answer
90 views

Standard settings for OCR'ing and compressing a book scan

Is there a set of standard best practices for compressing and adding text recognition to a scan of a book chapter? I'd prefer open source tools, but I'm hoping there is an existing script that ...
2
votes
1answer
135 views

JPG loses quality during ePUB to PDF conversion with calibre

I have a ePUB with a bunch of formulas as JPG files. In the ePUB they are super crisp, but during ePUB to PDF conversion with calibre all the images become blurry, I'd imagine they are JPG compressed. ...
2
votes
1answer
68 views

Automatic creation of bookmarks from Table Of Content

I've got this big problem: I have a PDF book with, say, 4 chapters and a bunch of paragraphs in each chapters. At the begenning of the book there is a non-clickable index with chapters, paragraphs and ...
2
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0answers
714 views

How to Open pdf, ncx, opf files?

I have an ebook downloaded from my university elearning site, it was downloaded, not online reading. But it can only be opened and readed from university's elearning app (android only, no iOS app for ...
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0answers
73 views

How can I publish an ebook online?

How can I publish e-books online so that I can sell them to readers?
2
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0answers
90 views

Create chapters with Office

I usually create summaries of my university stuff with Open Office (in DIN A5 page format) and export it as a PDF. This file I then just send to my Kindle 4 and the document is ready to be read. Now ...
2
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0answers
800 views

What is Best ebook reader for reading mathematics texts? [closed]

I want to know what is the best user-friendly ebook reader for reading mathematics text books. It should use e-ink display and should be able to read pdf and djvu files, text, scanned text, images.
2
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0answers
71 views

What's the correct way for developers to edit PDF? [duplicate]

Recently I got a task to manually add a Table of Contents to a PDF ebook generated by someone who left it out. I didn't know how to do it at first so I googled a lot and found some small tools but ...
1
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1answer
626 views

How to render asciidoc with latexmath macros?

I am trying to compile asciidoc files that contain equations in the following format: latexmath:[\(\mathbb{F}_p\)] [latexmath] ++++ \begin{equation} {K = k * G} \end{equation} ++++ First I tried to ...
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1answer
268 views

Convert an Android app which is actually an ebook to a pdf file?

I found some Android apps which are actually some kind of ebooks, for example, https://play.google.com/store/apps/details?id=me.zhujiaqi.leetcode. https://play.google.com/store/apps/details?id=com....
1
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1answer
208 views

How to save a PDF document without having to choose the file name each time?

I'm reading academic papers in PDF format in Adobe Acrobat Reader. However, when I highlight text and save the document, Acrobat keeps asking me to re-choose the file, rather than just overwriting the ...
1
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1answer
49 views

How to adapt annotations from an old edition book to a new edition book?

I like to write notes on ebooks for reorganizing the topics and for helping with my understanding. One question which I have with this way is that: when a newer edition of the same book comes out, ...
1
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2answers
88 views

How to skip those hyphens while searching in acrobat

I have two pdf files: original image pdf where the pdf file is just an image of the text ocr pdf produced by OCR, using ABBYY FineReader 11 these are the process i did i have a image pdf then i ...
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0answers
8 views

pdf TOC creator for large files upwards of 120MB?

I used to use jPDFbookmark's bookmarks feature to create/adjust tables of contents for PDf files, and it worked perfectly well to that end until I input 130MB file and it was no longer functional, ...
1
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1answer
24 views

How to delete the comment in the pdf?

I've tried using Adobe Reader and Adobe Acrobat to delete a comment in a pdf file. The comment was restored the moment I deleted it. How to delete it? File: https://github.com/mjs225/deletepdf/raw/...
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2answers
21 views

How can I compress this pdf file without losing readability?

I have a large black and white pdf scan of a book. The book is 1700 pages, and is about 300MB. That is about 150-175kb per page. This strikes me as rather large. Two arbitrarily selected pages are ...
1
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1answer
15 views

Possibility of converting a pdf containing equations to mobi

I have a pdf with lots of equations which gets distorted when converted to mobi format using calibre. Is there any reliable way of doing that? The equations in the pdf might have been written using ...
1
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1answer
62 views

Is it possible to only extract text from a PDF file for free?

Even if I download books in mobi or epub format for my Kindle, I’ve noticed that files with lots of images/graphs disrupt the formatting. Is there a way to delete all the images from a PDF file for ...
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0answers
10 views

Redefining “Page 1” in a djvu or pdf document

For context, I'm a graduate student and I rely on the indexes of digitized books pretty heavily. It is annoying that the page numbers in djvu/pdf files almost always fail to align with those of the ...
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0answers
29 views

How to make the entries of an existing table of contents clickable as link to the corresponding pages?

I have many eBooks as PDF from SpringerLink, which I use for research purposes. The eBooks have indeed a table of contents (with more than 50 entries sometimes), but unfortunately it is not clickable. ...
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0answers
30 views

What are “open” and “closed” settings in PDF bookmarks?

This is an excerpt extracted from the PDF bookmark, using JPdfBookmarks: Believe It or Not: Scientific Progress!?/44,Black,notBold,notItalic,closed,FitPage The Whole Is More Than the Sum of ...
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0answers
55 views

Calibre - output PDF with original page count

I have Calibre with opened KFX file, that shows after conversion to PDF 670 pages. However, the book itself has only 170 pages. How can I create PDF that will have correct page count?