k2pdfopt: optimizes PDFs for viewing on e-readers

willus · 06-06-2011, 11:58 PM

K2pdfopt optimizes PDF/DJVU files for mobile e-readers (e.g. the Kindle) and smartphones. It works well on multi-column PDF/DJVU files and can re-flow text even on scanned PDF files. It can also be used as a general PDF copying/cropping/re-sizing/OCR-ing manipulation tool. It can generate native or bitmapped PDF output, with an optional OCR layer. There are downloads for MS Windows, Mac OSX, and Linux. The MS Windows version has an integrated GUI. K2pdfopt is open source.

MS-Windows GUI (can also be used in Linux using Wine)

Home page: https://willus.com/k2pdfopt
Alternate site: https://willus.org/k2pdfopt
How to/Help: https://willus.com/archive/k2pdfopt/help
Alternative GUIs for k2pdfopt: https://willus.com/k2pdfopt/contrib

(Thank you to MR users thomass and wangminh12 for starting the original k2pdfopt threads which were merged into this one.)

ThomasC · 07-30-2011, 02:15 AM

Works great and produces a very readable K2 output. Any chance to do one for the Kindle DXG? Or, could you suggest which options I'd need to use since I'm not that computer savy. Thanks.

Regards,
Tom

thomass · 07-30-2011, 03:51 AM

Quote:

Originally Posted by ThomasC

Works great and produces a very readable K2 output. Any chance to do one for the Kindle DXG? Or, could you suggest which options I'd need to use since I'm not that computer savy. Thanks.

Regards,
Tom

Just give the correct size: http://www.willus.com/archive/k2pdfo...opt_help.shtml (third picture)

DickeFix · 07-31-2011, 05:52 AM

I have now tested this program and I am so impressed by it. It quickly converts dual column scientific papers with formulas and figures so that they can be easily read on the Kindle 3. It works much better than Duokans two-column function and is in my opinion one of the most important tools ever to have appeared for eBook readers.

mtsp · 07-31-2011, 12:56 PM

This is marvelous.
Thank you!

Harmon · 08-03-2011, 12:15 AM

But it doesn't work for Macs.

tvjohn · 08-03-2011, 05:19 AM

Quote:

Originally Posted by Harmon

But it doesn't work for Macs.

True, that's a pity.

However, if you have several pdf's to convert, you could install "VirtualBox" from Oracle (previously a Sun µSystems product) & install k2toPDF. I've done that & it works fine.

It would be much nicer to have a mac native version of k2toPDF though

Harmon · 08-03-2011, 06:35 PM

Quote:

Originally Posted by tvjohn

True, that's a pity.

However, if you have several pdf's to convert, you could install "VirtualBox" from Oracle (previously a Sun µSystems product) & install k2toPDF. I've done that & it works fine.

It would be much nicer to have a mac native version of k2toPDF though

Well, it's just a matter of convenience for me - I can put them on my KDX or iPad as it is.

wangminh12 · 08-03-2011, 10:54 PM

@ Thomass: thank you.

PoP · 08-10-2011, 10:49 PM

@wangminh12 thanks for pointing this program from willus.

It rendered my (scanned document) pdf with multiply sized images, split some columns, enlarged some segments, cropped others pages, and really made a suite of differently zoomed images...

All in all, and despite the weird and inconsistent page styles, it produced the easiest reading and best output I have seen for a PDF.

... and I have tried many, many, many PDF "enhancers" to 6 inches screen.

This is a gem.

tempname2001 · 09-06-2011, 09:33 PM

yes.this is really a good app!!

willus · 09-10-2011, 05:52 PM

Quote:

Originally Posted by Harmon

But it doesn't work for Macs.

K2pdfopt v1.22 works has an OSX version now.

http://willus.com/archive/#kindle

ThomasC · 09-10-2011, 06:53 PM

Many thanks Willus. I downloaded the new version and it works great. Now it's much easier to select options to fine-tune things. Best Kindle addon ever imho!

Cheers,
TomC

willus · 09-12-2011, 10:46 PM

Quote:

Originally Posted by ThomasC

Many thanks Willus. I downloaded the new version and it works great. Now it's much easier to select options to fine-tune things. Best Kindle addon ever imho!

Cheers,
TomC

Thanks.

youssef · 09-13-2011, 01:13 PM

you are a genius,
thanks a lot

06-06-2011, 11:58 PM	#1
willus Fuzzball, the purple cat Posts: 1,283 Karma: 11087488 Join Date: Jun 2011 Location: California Device: iPad	k2pdfopt K2pdfopt optimizes PDF/DJVU files for mobile e-readers (e.g. the Kindle) and smartphones. It works well on multi-column PDF/DJVU files and can re-flow text even on scanned PDF files. It can also be used as a general PDF copying/cropping/re-sizing/OCR-ing manipulation tool. It can generate native or bitmapped PDF output, with an optional OCR layer. There are downloads for MS Windows, Mac OSX, and Linux. The MS Windows version has an integrated GUI. K2pdfopt is open source. MS-Windows GUI (can also be used in Linux using Wine) Home page: https://willus.com/k2pdfopt Alternate site: https://willus.org/k2pdfopt How to/Help: https://willus.com/archive/k2pdfopt/help Alternative GUIs for k2pdfopt: https://willus.com/k2pdfopt/contrib (Thank you to MR users thomass and wangminh12 for starting the original k2pdfopt threads which were merged into this one.) Last edited by willus; 06-17-2020 at 10:44 PM.

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07-30-2011, 02:15 AM	#2
ThomasC Thunder Down Under Posts: 210 Karma: 29154 Join Date: Jun 2010 Device: kindle dxg, K3, K4nt, iPhone	Works great and produces a very readable K2 output. Any chance to do one for the Kindle DXG? Or, could you suggest which options I'd need to use since I'm not that computer savy. Thanks. Regards, Tom

07-31-2011, 05:52 AM	#4
DickeFix Enthusiast Posts: 43 Karma: 4733 Join Date: Apr 2011 Device: Kindle 3Wifi+3G and DX	I have now tested this program and I am so impressed by it. It quickly converts dual column scientific papers with formulas and figures so that they can be easily read on the Kindle 3. It works much better than Duokans two-column function and is in my opinion one of the most important tools ever to have appeared for eBook readers.

07-31-2011, 12:56 PM	#5
mtsp Enthusiast Posts: 31 Karma: 12 Join Date: Jul 2011 Location: São Paulo, Brasil/Brazil Device: Kindle 3 3G	This is marvelous. Thank you!

08-03-2011, 12:15 AM	#6
Harmon King of the Bongo Drums Posts: 1,625 Karma: 5927225 Join Date: Feb 2009 Device: Excelsior! (Strange...)	But it doesn't work for Macs.

08-03-2011, 10:54 PM	#9
wangminh12 Junior Member Posts: 7 Karma: 2667 Join Date: Jul 2011 Device: kindle 3G	@ Thomass: thank you.

08-10-2011, 10:49 PM	#10
PoP curly᷂͓̫̙᷊̥̮̾ͯͤͭͬͦͨ ʎʌɹnɔ Posts: 3,008 Karma: 50506927 Join Date: Dec 2010 Location: ♁ ᴺ₄₅°₃₀' ᵂ₇₃°₃₇' ±₆₀" Device: K3₃.₄.₃ PW3&4₅.₁₃.₃	@wangminh12 thanks for pointing this program from willus. It rendered my (scanned document) pdf with multiply sized images, split some columns, enlarged some segments, cropped others pages, and really made a suite of differently zoomed images... All in all, and despite the weird and inconsistent page styles, it produced the easiest reading and best output I have seen for a PDF. ... and I have tried many, many, many PDF "enhancers" to 6 inches screen. This is a gem.

09-06-2011, 09:33 PM	#11
tempname2001 Junior Member Posts: 4 Karma: 13 Join Date: Feb 2010 Device: kindle 3	yes.this is really a good app!!

09-10-2011, 06:53 PM	#13
ThomasC Thunder Down Under Posts: 210 Karma: 29154 Join Date: Jun 2010 Device: kindle dxg, K3, K4nt, iPhone	Many thanks Willus. I downloaded the new version and it works great. Now it's much easier to select options to fine-tune things. Best Kindle addon ever imho! Cheers, TomC

09-13-2011, 01:13 PM	#15
youssef Member Posts: 15 Karma: 12 Join Date: Jan 2010 Device: JBL	you are a genius, thanks a lot