og:image tag using default image and not post image

  • Dear Support – First off, thanks for building a great product. I checked the forums but couldnt find this issue reported earlier hence opening a ticket.

    We have a feature where our members can write blog posts (and set featured images) from our wordpress front-end. All these posts are saved in a Custom Post Types. We are using rankmath to generate all Open Graph tags & we are facing an issue with facebook. For most of the posts, the facebook image is correctly generated in Open Graph image tag generated by Rankmath but in some cases, the image generated is not post image but the default image configured in Rankmath (Rankmath -> Titles & Meta -> Global Meta -> Open Graph Thumbnail. The default image is supposed to be used only if there is no post image.

    Here is a post where og:image is generated correctly by Rankmath – https://os.me/short-stories/perfect-piano-teacher/
    Here are two posts where og:image is defaulting to the Global Meta even though post has an image –

    We are not sure why in most cases Rankmath og:image tag is generated correctly while in few cases, it misses the image & starts using the default image. Can you please explain?


Viewing 14 replies - 1 through 14 (of 14 total)
  • I can confirm this.

    I have set an default image. This I need for posts without a picture in and without a set facebook image.

    The og: image is set to the defined facebook image. If there is no one defined the default image will be used instead of the first image of the post.

    This should be the order:

    1. Set Facebook image
    2. First image of post
    3. Default image from settings

    Is there any code I can place to the functions.php to get it working?

    This code doesn’t help to get the first image as the og:image if there is no Facebook image set. I still get the default image placed… but there is a content image.

    add_filter('rank_math/opengraph/pre_set_content_image', function() {
    	return true;

    However, if this would work, the next question is what happens if there is a set Facebook picture!? The content picture should only be used as the second option!


    Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.

    I have submitted the questions to the devs to see if you can change the order and also use the first image of the content if necessary. We will let you know more once they check it.

    Looking forward to helping you. Thank you.


    Thanks! I’m happy with every solution… doesn’t matter if there is an option in the settings or I need to update the functions.php…. most important is a quick solution 😉

    • This reply was modified 1 month ago by Sven.

    Thanks Alberto. I agree with Sven that quick solution is important. Just to reiterate what I noticed was that sometimes RankMath uses the post image (which is correct) but some times it uses the default image. I have shared the examples above. Happy to provide more details so your Developers can reproduce the issue.

    Thanks for the help.

    Same with me… In the past first conttent image was used, now I can’t find an example where it is used (but havend checked much post, just saw many without using it)


    Following is the priority in which Rank Math adds an image in the og:image tag:

    1) The Image set in the Social >> Facebook field
    2) The featured image
    3) The first image from the content. ( i.e the src from the first https://os.me/short-stories/flight-or-fancy/

    On these 2 posts of yours, I don't see any images in the content. The image which is in the banner is a background image. To add the content image in og:image tag, the image must be in the img tag.

    Please try adding image in the content or you can set an image in the Facebook tab from Rank Math metabox/sidebar.

    I hope that helps.

    Hi Patrik,

    you missed the default image in your list. This will be bused before 3) and MUST BE after 3)

    Check this post: https://esser.me/what-is-a-cx-methodology-and-a-cx-strategy/

    circle2.png is the default image which should only be used if 1), 2) and 3) is not available. In this link the strategy-835×362.jpg should be the og:image
    If I delete the default image, then the strategy-835×362.jpg will be used… but I need the default image as afallback if there is no other image available.

    For sure, I can go and set a Facebook image post by post… but I can’t do this for hundreds of posts. If this is realy needed, I need to switch back to Yoast.


    • This reply was modified 1 month ago by Sven.

    Hi Pratik – The two examples that I had given have a featured image. And yes, we are showing featured image a bit differently on the page (as a background on TOP) but it’s a featured image.

    My understanding is that it should work. Note that I have given another example of the page where it is working. In fact for most of my posts, the og:image generated by Rankmath is correct. But sometime it doesn’t work And I want to know what’s the difference when it works vs when it doesn’t work. I don’t see any difference in the post itself.

    Let me know if you need more details.

    Looks like we have a bit different but overlapping issues with the og:image


    If it’s featured image then it should take priority over the default image.

    We might need to take a closer look at the settings. Please edit the first post on this ticket and include your WP logins in the designated Sensitive Data section.
    Sensitive Data Section

    It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead:


    You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):


    We really look forward to helping you.


    Thank you for providing access. I checked the 2 posts on your site which are not showing the featured image.


    The reason why Rank Math is not adding the featured image on these 2 posts is that the image dimensions are less than the required dimension. The required dimensions are:
    Width: Min 200px & Max 2000px
    Height: Min 200px & Max 2000px

    In both the posts, the height of featured image is 168px so Rank Math is not adding it. Please try adding bigger images, that will fix the issue.

    I hope that helps.

    Thank you Pratik for the response. I updated the image in https://os.me/short-stories/flight-or-fancy/ and now it’s more than 200px, Rankmath is still not using the featured image. Not sure if I am missing anything here.


    It looks like we are using the same og:image as your featured image:

    Could you please try after clearing your cache? As far as I can tell, Rank Math is outputting the og:image correctly.


    Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.

    If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.

    Thank you.

Viewing 14 replies - 1 through 14 (of 14 total)

The ticket ‘og:image tag using default image and not post image’ is closed to new replies.