Any image uploaded to a post in the post editor is “attached to” that post. Actually, you can only set an attached image as Featured Image (aka Post Thumbnail — not to be confused with “Thumbnails”), and it’s NOT vice-versa.
If you do not want an image to be attached to a post, you can upload the image directly to the Media Library (via WordPress Dashboard > Media > Add New) and then use the image in your post (from the From URL tab in the media uploader in the post editor).
Related Posts:
- How to Fix HTTP Error When Uploading Images?
- Close featured image modal windows with JS
- How to get image title/alt attribute?
- Delete original image – keep thumbnail?
- Set Featured Image Front Frontend Form
- media_sideload_image generates blank?
- media_handle_upload for local files?
- How to change the naming of the resized image files
- How to change _wp_attachment_metadata specific value in SQL?
- Set (featured) thumbnail for post?
- How can I get a different image size, if all I have is the link?
- Delete all thumbnails for a post
- How to set an attachments parent post id in code?
- How do i show wordpress attachments from current post?
- Need clear explanation about medias/files/attchments
- Exclude featured image from attachment loop
- How to create resized versions of images added with wp_insert_attachment
- Show Multiple Size URL of one Featured Image/Thumbnail?
- Check if parent post is sticky on attachment page?
- How to bring files from the upload directory to the media gallery?
- WordPress not creating “large” thumbnails
- How to attach images that I “insert from url” into the post?
- Moved server, and WP now uses original images for all thumb sizes?
- replace featured image from frontend
- After migrating media library is not showing thumbnails
- How to get post thumbnail to be equal to set media size
- Featured Image URL is Showing but not thumbnail
- Import Dummy Content and Post Thumbnails
- Get all images from posts with maximum number and without featured image
- Get Thumbnails and Thumbnails URL from Media Manager
- Why not attaching images after impoting using wp cli
- wp media regenerate says “no regeneration needed” whe that’s no the case
- How do I set a featured image (thumbnail) by image URL when using wp_insert_post()?
- How do I get image url only on the_post_thumbnail
- Add class name to post thumbnail
- How to manage attachment relationships for specific posts in WP 3.5+
- How to disable WordPress from creating thumbnails?
- How to retrieve image from URL and set as featured image/post thumbnail
- Programmatically get images by URL and save in uploads folder
- How to set featured image to custom post from outside programmatically
- How do you remove hard coded thumbnail image dimensions?
- How do you get the post thumbnail size?
- Setting a post’s featured image from an embedded YouTube video
- How to get featured image’s width and use elsewhere in template?
- set_post_thumbnail_size vs add_image_size
- Minimum Dimensions Requirement for Featured Image?
- Generate Thumbnails only for Featured Images
- Get the first image from post content (eg.: hotlinked images)
- How to get all featured image sizes and their URLs?
- How to Dynamically Resize WordPress Image On-The-Fly (custom field/theme option)
- How to trigger a refresh in the media modal
- How to use taxonomies on attachments with the new Media Library?
- How to add post featured image to RSS item tag?
- How do I regenerate thumbnails?
- Display thumbnail only if requested size exists
- the_post_thumbnail responsive srcset not populating with custom image size
- Set custom name for generated thumbnails
- Post thumbnail alt title
- Get Featured Image via direct sql query
- Get featured image on Blog Index
- the_post_thumbnail hard cropping not working no matter what
- Can I refresh the thumbnails programmatically?
- How to add multiple image sizes of the same size with add_image_size
- New image size version only for the Featured Image file
- wp_get_attachment_image_src always returns full-sized image
- Get featured image URL by page id
- change set_post_thumbnail_size according to post type admin page
- How can I bulk delete media and attachments using WP-CLI?
- Add Title Attribute to WordPress Image the_post_thumbnail
- Can’t extract and set SVG dimensions
- Getting Thumbnail Path rather than Image Tag
- Stop WordPress from reserving slugs for media items?
- Display Category Thumbnail and links in Woo commerce
- What plugin can I use to create a list / slideshow of featured images?
- Can I use the wp media uploader for my own plugin?
- the_post_thumbnail with lazyload JQ plugin
- Open media frame and select an attachment
- Replacing Gutenberg Featured Image control?
- How to find attachment by it’s name?
- Display Post Thumbnail Without Being Featured Image
- Featured Image of Video from oembed
- oEmbed, thumbnails and wordpress
- wp_get_attachment_image_src() and custom sizes
- get_the_post_thumbnail() doesn’t taking style attribute
- Prevent WordPress from cropping GIF files
- Differentiate Featured Image from Post Images upon Upload
- Post thumbnail outside the loop
- Expanding new Media Uploader in WordPress 3.5
- Put the media uploader in a metabox
- What’s the difference between post thumbnails and featured images (if any)?
- Uploading Multiple Attachments From Front-End With A Description
- Getting custom-sized featured image’s URL?
- get_attached_media() returns empty array if media file already used by another post
- What is your take: TimThumb vs. WordPress Thumbnails? The great debate [closed]
- How do I detach images from posts?
- How to crop thumbnail height to auto with set width
- Retrieve 1st image in post and set it as featured image, when post is saved/updated
- Use thumbnail image using url of that image
- Retrieve featured image as object
- How do I add the featured image to the_content after the first paragraph?