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FAQs and Contact Support

How do I get faster support and help?

We recommend using the contact form on our premium support page or the contact form on our WordPress Support Forum. You can also leave a comment in the comment section below, but that will be a bit slower and has a limitation with sharing extra info like screenshots and private information like website URL.

Before contacting us, please make sure that you:

  1. Read the documentation carefully,
  2. See this Support FAQs

If you didn’t find the answer to your problem, please ask your question on the item discussion page or send us a private message from the support contact form and we will reply via email.

For the fast troubleshooting, please send us detailed information about the issue. Also, make sure that you don’t forget to send us your site URL where you are using/want to use the item. Please note, that we cannot troubleshoot efficiently from screen-shots.

Please take some time until we respond (usually in 24 – 48 hours).

PDF and FlipBook Loading issues:

Why is PDF loading slowly?

PDFs will load slowly due to various reasons. A big size will take longer to download, improper encoding will disable various loading feature. We have pointed out some of the major issues that can be resolved to make loading faster.

1. Remove gZip for PDF

Pdfs are readily compressed while exporting so extra compression won’t make any benefit. By default, the plugin supports partial loading inbuilt. but for that, you need to make sure partial loading is not disabled. Normally, as default, partial loading is supported out of the box. But, in cases where gzip is enabled for PDF then the partial loading won’t work.

Disable gzip for PDF in .htaccess file.

<IfModule mod_headers.c>
    <FilesMatch "\.pdf$">
        RewriteRule ^(.*)$ $1 [NS,E=no-gzip:1,E=dont-vary:1]

Further Reading at StackOverFlow https://stackoverflow.com/questions/9249243/how-to-disable-apache-gzip-compression-for-some-media-files-in-htaccess-file

How to check gZip status for a file?

You can use the link to your PDF and enter that at https://www.giftofspeed.com/gzip-test/ to test the gZip status of a file.

2. Make PDF optimized for web purpose:

Make sure your PDF is Web optimized. PDFs are normally exported for printing and are of high quality, around 300-600dpi, which a printer requires. But for reading purposes on-screen 72-100dpi is enough. 50MB for 10 pages is not good for web use. Optimize the PDF and make per page average as max as 500KB or less. Maybe this can be useful: https://www.iskysoft.com/edit-pdf/optimize-pdf-mac.html

There is a CORS (Cross-Origin) issue and PDF is not loading!

This occurs when the file and page are in HTTP and https mixed protocol. This is a result of improper https redirection. We recommend using a proper setup to redirect every HTTP request to https to avoid any conflict.

If you are using the file from another domain, make sure you have proper CORS setup done in another domain. For Apache Server, add following lines in .htaccess file

Header set Access-Control-Allow-Origin "*" 
Header set Access-Control-Allow-Headers "Range" 
Header set Access-Control-Expose-Headers: "Accept-Ranges, Content-Encoding, Content-Length, Content-Range"

More Info: https://enable-cors.org/server.html


How to change thumb size for lightbox popups?

You can change the thumb size by using Custom CSS. We recommend using Theme Customizer -> Additional CSS section for adding Custom CSS.


How to change the color of links in the flipbook?

The links in the PDF are auto-detected and highlighted in yellow as default. To change the color you can either make the highlight transparent to hide the yellow highlight or change the color to another. We recommend using Theme Customizer -> Additional CSS section for adding Custom CSS.

/* Make the highlight transparent - no color */

section.linkAnnotation a, a.linkAnnotation, a.customLinkAnnotation, .customHtmlAnnotation, .customVideoAnnotation{
/* Make the highlight color red */

section.linkAnnotation a, a.linkAnnotation, a.customLinkAnnotation, .customHtmlAnnotation, .customVideoAnnotation{ 
    background-color: red; 

Custom Buttons

You can create your own buttons by using the ‘custom’ type shortcode. Example:

[dflip id="123" type="custom"]Your button shortcode goes here[/dflip]

[dflip id="123" type="custom"]<div class="custom-button">My Button</div>[/dflip]

[dflip id="123" type="custom"][button-shortcode]My button[/button-shortcode][/dflip]


Your button shortcode goes here

Custom Links

You can create your own link by using the ‘link’ type shortcode. Example:

[dflip id="91" type="link"]Click this link[/dflip]

Demo:  Click this link to open flipbook    

How to disable Zoom in Flipbook?

There are two types of zoom available in dFlip Flipbook Plugin and both types can be changed as per requirement.

  1. Disable Zoom on Mouse Scroll: This can be disabled using the dFlip Books -> Settings -> Enable Zoom on Scroll setting. This enabled and disabled the zoom effect on mouse scroll. To disable zoom on mouse scroll set the value to False.
  2. Disable Zoom Buttons: This option will hide the Zoom-In and Zoom-Out buttons. To do so, under dFlip Books -> Settings -> HideControls add zoomIn, zoomOut into the textBox. Make sure the control names are separated by commas and in the exact letter case.

Change Log

    30/01/2020 - Version 1.5.6:
    [New Feature]: Link target options for PDF links
    [Improvement]: HTTP and HTTPS file not found conflict is autocorrected depending on the page protocol

    Version 1.5.33:
    [New Feature]: Google Analytics beta implementation
    [Improvement]: openpage moved to getOptions
    [Fixed]: Limit ="-1' is now as default, no more limited to 5 books only

    Version 1.5.21:
    [Improvement]: Code refactor for ZoomScale
    [Improvement]: Outline is hidden if outline is not avaiable

    Version 1.5.19
    [Fixed]: Fullscreen fix for Autoheight
    [Fixed]: Open Page fix for multiple books with the same id

    Version 1.5.15
    [Improvement]: Save error details are displayed for debugging.
    [Fixed]: Cron updates will also save the dFlip post

    12/06/2019- Version 1.5.142
    [Fixed]: Compatibility issues with php7 if the shortcode is empty by mistake and small notices fixes

    Version 1.5.141
    [Fixed]: Lightbox size correction while in wp amin

    Version 1.5.14
    [Fixed]: Auto Height for lightbox set to 100%

    03/03/2019 - Version 1.5.13
    [Improvement]: Auto Height
    [New Feature]: Controls Position setting
    [Improvement]: Requirejs and ES6 compatibility

    09/06/2018 - Version 1.4.3
    [Improvement]: https mode is auto-detected when migrating from http
    [Fixed]: cMap location updated for newer PDF.js version
    [Fixed]: Booklet mode in mobile reverse flips were not clearing old images
    [Fixed]: PaddingLeft and PaddingRight fixes

    01/05/2018 - Version 1.4.2
    [New Feature]: OpenPage parameter
    [Improvement]: compatibility for php 5.2
    [Improvement]: Category Limit fix
    [Improvement]: Autodetection of code location
    [Improvement]: Require.js compaitibilty
    [Improvement]: PDF.JS update
    [Improvement]: Thumb sync

    23/11/2017 - Version 1.3.3
    [New Feature]: Categories for WordPress
    [New Feature]: New Short-code to support multiple books
    [New Feature]: Range Size option added
    [Improvement]: Smooth animated zoom
    [Improvement]: Video Tutorials and easy shortcode in post screen
    [Improvement]: CMAPs added in options
    [Improvement]: canvas mode added in options
    [Improvement]: morecontrols options is added
    [Improvement]: autoplay options is added
    [Improvement]: compatibility for php 5.3
    [Fixed]: IE10 compaitibility
    [Fixed]: Line-height was overridden in some themes
    [Fixed]: Thumb animation removed in safari

    9/06/2017 - Version 1.2.8
    [New Feature]: Pinch To Zoom
    [New Feature]: PDF annotation icons support
    [New Feature]: WebGL shadow option
    [New Feature]: Annotation class option
    [Improvement]: Clear text in mobile
    [Improvement]: Close button for thumbnail and outline
    [Improvement]: Added mail and google plus share
    [Improvement]: Support loading scripts when there are no script tags available
    [Improvement]: Organized maincontrols order
    [Improvement]: PDF.js Update
    [Improvement]: THREE.js update
    [Improvement]: Double size images support
    [Improvement]: Webkit CSS support
    [Fixed]: Center Align Issue in mobile
    [Fixed]: Safari Fixes
    [Fixed]: ESC button for full-screen resolved
    [Fixed]: Page blur due to size miscalculation
    [Fixed]: Missing Outline icon from font-awesome
    [Fixed]: __extends() function is not isolated
    [Fixed]: RTL booklet update

    25/01/2017 - Version 1.2.7
    [New Feature]: Booklet mode option added in single page
    [New Feature]: Auto enable thumbnails
    [New Feature]: Zoom ratio option
    [New Feature]: Force fit pages option
    [Improvement]: Smooth animated zoom
    [Improvement]: Smooth loading updates

    19/11/2016 - Version 1.2.6
    [New Feature]: Deep Linking
    [New Feature]: Share Option
    [Improvement]: Multiple size PDF Flipbook support
    [Improvement]: FullScreen support for IE and browsers in IOS

    03/10/2016 - Version 1.2.4
    [New Feature]: Custom Controls postioning
    [Improvement]: HTML Method for Flipbook creation
    [Improvement]: Loading Info
    [Improvement]: Compatibility with old and new jQuery
    [Improvement]: require.js and cloudfare compatibility
    [Fixed]: Keyboard pagenumber issues in IE

    18/08/2016 - Version 1.2
    [New Feature]: Translate
    [New Feature]: Swipe gestures
    [Improvement]: Realistic turn effect in CSS Flipbook
    [Improvement]: Multi-stage zoom
    [Improvement]: New clean layout
    [Improvement]: Optimized 3D WebGL mode
    [Fixed]: Compatibility issues for IE 10, IE11

    16/06/2016 - Version 1.1.3
    [Improvement]: PDF Flipbook annotation alignment for RTL mode
    [Improvement]: LightBox Examples added
    [Fixed]: CSS load Fixes for IE

    11/06/2016 - Version 1.1.2
    [New Feature]: Light-box mode added
    [Improvement]: jQuery Flipbook - Examples

    05/06/2016 - Version 1.1
    [New Feature]: Better Responsive structure with Single Page Mode
    [New Feature]: RTL mode
    [New Feature]: Flip Sound
    [New Feature]: PDF Flipbook - download option
    [Improvement]: Smart Fallback to HTML5 Flipbook
    [Improvement]: Better Icons

    21/04/2016 - Version 1.0

How can we help?

71 thoughts on “FAQs and Contact Support”

    • Hi,
      We don’t store user name password, yeah but you could use some membership plugins and then protect the files and page from unwanted access.


    • Hi,
      You can create multiple PDF flipbooks with the plugin on a single site.
      The demo(lite) version is limited to 30 pages, while the premium(full) version has no such limit.

    • Hi,
      DFlip uses PDF.js library for PDF rendering. PDF.JS cannot auto-convert text to links, so the links are needed to be defined in PDFs.
      Some Desktop readers might auto-convert those text to links, but those are actually just text.

      We recommend explicitly defining and creating links so that the PDF will work properly in other readers too.


    • Hi,

      You might be using Adobe PDF reader, that automatically converts text to links – even if the links are not declared.
      That will give a misconception that the link was created.

      In-reality: if the links were created they would be supported by all readers- even those who don’t support auto conversion of text to links.
      As explained before, we use PDF.js for rending PDF and they don’t support auto conversion of links.

      We checked your PDF file by downloading and opening in Adobe Reader, the text is converted to links, but not in other readers. Mail links on Page 2. If you disable that feature in Adobe Reader, then those links won’t be there.

      Please download Mozilla Firefox and open the PDF in that browser. If the links are working in Mozilla Firefox too then let us know. if they are not working there too, please define your links.
      Please remember web PDF readers are not as advanced and powerful as desktop readers.

      Other PDF readers that don’t support auto-link conversion:

      Related Case:

      That PDF file doesn’t actually contain any links, but just standard text.

      Such “links” can work in e.g. Adobe Reader, but only if you have enabled automatic creation of hyperlinks (this setting seems to default to on).


      How to Disable Auto link creation in Adobe Reader:
      Menu -> Edit -> Preferences -> General -> “Create Links from URLs” -> disable that option


  1. Hello, I bought this plugin and it doesn’t work on my site. The message is as follows: The package could not be installed. No valid plugins found.

    The plugin installation has failed.

  2. Deep-linking to a certain page won’t work for me. I get the link from the share button including the page number, but when I paste that URL to a new browser window, the flipbook always opens the first page.

    Also, I couldn’t find out how to open the flipbook in ‘lightbox mode’. Do I have to set this in the shortcode? Maybe this could solve the problem?

    Thanks for any advice!

    • Hi,
      If you have premium access you can get beta updates that have fixes for that issue and are yet under release pipeline.


  3. Hi,

    is it possible to add a link to a menu? I’m trying to do it but I can’t put a shortcode to URL field

    Thanks in advance!

  4. Hello !
    my pdf files are in a folder protected by an htaccess

    Require all denied

    Do you have a solution ?
    thank you
    Best regards

    • Hi,

      Lightbox/popups are already built into DearFlip. You can use them.
      [dflip id="123" type="thumb"][/dflip]
      We don’t recommend using third-party lightboxes, as they cannot provide proper resizing updates to the flipbook and won’t work properly.


  5. Is it possible to add clickable URL links to the flipbook?
    EXAMPLE: My magazine has ads, and I want viewers to click on the ad and be re-directed to the advertiser’s website.

    • We suggest adding the ads inside the PDf using PDf editor or while exporting your document as PDF.
      Then those will work as a link in flipbooks too.
      Note: links require a full version of DearFlip to work.

    • Hi Sagar,
      Our plugin is to display PDFs in a flipbook format, and will focus on that. It doesn’t have anything regarding WooCommerce so far.


  6. The plugin was working just fine but then all of a sudden is now giving this loading error that says “Please wait while flip book is loading. For more related info FAQs and issues”.


  7. I’m interested in indexing my large catalog PDFs per page, so search engines will crawl my site per page and take a user to the specific flipbook page of the PDF. If Google just indexes one giant PDF, won’t that take the user to the PDF directly and not the flipbook? Can I somehow integrate Tika output so that each page of text is indexed per deep-linked page? Many thanks for any suggestions — I really want this plugin to be part of the solution!

  8. Thank you very much for the reply. How about a different scenario: I turn a 400-page PDF into 400 .jpg images (pdftopng+mogrify+jpegoptim), bulk import them (wpallimport) so each image’s description is the text content of that page (Tika plus a small Python script), and then I make a flipbook out of those 400 images. A Google search takes a user to the image, but an image click takes the user to the deep link inside the flipbook. Is that possible with your plugin as is?

  9. Hi John,

    We don’t fully understand what you are trying to achieve. It’s just too complex will all those variables. Our plugin is just a viewer to display PDF and supports deep-link to go direct to a page..

    Alas, we will pass on this.

  10. Hello,
    I love this plugin. So easy to use for admins and end users!

    Question re display of a set of books within a category.
    The Title of the book is only available on hover over the thumbnail image. We would like to see the Title UNDER the image as part of the display instead of only on hover. As a temporary measure, I’ve edited each image and added text at the bottom of the image but this is a time-consuming process and it would be preferable to have the system show the Title under the image.

    Please see this example: https://focis.org.au/sandbox/focis-newsletter-as-a-flipbook/

    I’ve looked at the CSS but have not been able to work out what changes would be needed to have the Title appear under the image.

    Please help.

    Thanks, Tom O’Dea

  11. Hello..
    Dflip is one of the best pdf book to use on wordpress..
    But i want to disable download pdf menu.. how can i do that?

    • It’s available in the Layout section of the individual flipbook post.

      If you are using Premium version you can disable it site-wide using Global Settings

  12. Hello,
    I have a couple of questions –

    1) It’s mentioned in the docs that dflip prefix is being used but I installed the lite version and I see the prefix “dearflip” being used. Is it possible to change this?

    2) Can the loading text be changed? While the flipbook is being loaded it again mentions “dearflip loading..” Can this text be customized?

    • Hi,
      -dflip was default prefix before, after the name of the plugin was renamed, it’s now -dearflip.
      dflip was shorthand of DearFlip brand and was hard to read and remember.
      We are updating the docs and plugins with this new name.

      The loading text and prefix are global settings that can be changed with the premium version – Under Global Settings.
      WordPress doesn’t allow to display premium features in lite version and we had to remove the pages.
      Lite version is to display the capabilities and working of dearFlip plugin so that people can test before purchasing.

      Read more at:


  13. I’m suddenly receiving an error upon flipbook load that reads “Please wait while flipbook is” – I’ve reuploaded the media file, cleared all caches, and updated the plugin with no success.

    • Hi,

      We had a look at your site.

      You had updated to WordPress 5.5, and that release had a requirement from all plugins that they need to update their jQuery compatibility.
      Many plugins haven’t and that is resulting in other plugins execution issues.

      Please check your site for errors and update those plugin versions that don’t comply with WordPress 5.5

      This can be helpful until those plugins are updated:


  14. Hi,

    I have added a deep link URL (taken from the share button on my flip book) to a button on my web page. When the user clicks the button my flip book is opened in the lightbox overlay mode as normal. However, if the flip book is then closed (using the normal ‘X’ in the top right corner of the overlay) and the user tries to click the button again to re-open, then the flip book will not open again. It simply appears as though the button does nothing.

    The work-around I have at the moment is to make the button open the flip book in a new window. This works every time with no issue. I would prefer, however, to not force the user into a new window each time they open the flip book.

    Any advice on this?


  15. Hi,
    how to set up Dflipbook to handle different page sizes within a PDF?
    I use it for a magazine archive, and the cover is A4, the inner page pairs (!) are landscape A3. Your viewer displays these A3 pages warped into portrait A4.
    Poked page display settings, no result.
    What is your advise?

  16. Hi,

    I have a page that uses tabs, and each tab shows one book.

    Only the first shown tab loads the book in the right size, the rest of the tabs show a small thumbnail and need to be clicked to load as the proper size.


    Can you please advise if there is anything that can be done to ensure all books are loaded in the proper size?

    Thank you for your support!


    • Hi,
      Tabs don’t provide size to their content when they are hidden. When the content changes to the visible state, other elements are re-aligned and resized normally by the browser. But, complex canvas elements cannot. They need re-calculations from code.
      Tab change cannot be detected by third-party code unless they fire some events. This leads to an unknown state for flipbook and they can’t resize.

      Since you are using different tabs to display different flipbooks, We suggest using popups provided by DearFlip.
      Have a look at how you can open different flipbooks with different thumbs:

      With the full version, you can use tab like links to open flipbooks too!

      Plus, using multiple embedded mode on a page is not recommended. Because they all load with page load and make the page slow, Use lightboxes.


      • Thanks for the quick and thorough reply, Deip!

        I decided to instead show them as buttons by adding the type=”button” condition, but for some reason, it just loaded all files as books instead of buttons.

        Thus, I created a separate page for each document, which solved the issue 🙂


  17. Is it possible to add a search function to the PDF? So that you can type a specific word and it brings you to a specific page with those words?


  18. I dont understand the yearly charge? What happens if after a year I decide to stop using the application, what happens to the flipbooks I have already made and are on my site.

    • Hi,
      They will stay there and you can continue to use the plugin.

      The plugin won’t get updates and support after the license expires, nothing else changes.

      A yearly license helps us continue working and supporting the plugin.

  19. Hi I want to try it out for a while.
    Is there a possibility to buy it for a year only, without automatic repayment.
    What will happen with the plugin after a year?

  20. hello

    First of all, i love your plugin, tried everything on the wp plugins and this is by far the best one!
    Right now i am using the lite version, but in a few months i will probably need bigger files and i’ll be moving to pro.

    Until then, i would appreciate your help. Here is the situation:
    I have built a page with nicepage and inside it is a tabs element, and 3 tabs with 3 shortcodes for the 3 PDFs i want to display.
    The problem is, on the first tab, which is shown when the page is loaded the PDF is shown properly, but on the second and third on loading the PDF is really small and you need to zoom twice until everything settles and works perfectly.

    The page is: https://udzbenici.alfa.hr/primary-booster/

    Please help me, I am unsure in which direction to go…..

    • Hi,

      Don’t use tabs, you can use thumb popups provided by DearFlip. Also using multiple embedded flipbooks on a page is not recommended- use lightbox popups.
      With thumb type popup lightboxes, user can open the required flipbook that they want to read.



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