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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsWhen an image fails in WordPress, first identify whether the trouble is the upload, the image size or crop, the source file, or the server’s image-processing support. The right fix depends on the symptom: changing the original image will not solve a host upload limit, and regenerating thumbnails will not restore an image whose external URL is gone.
Why can’t I upload images to WordPress?
If the multi-file uploader fails, try WordPress’s Browser Uploader instead. On the Media Add New screen, check the maximum upload size shown there; the host sets that limit. WordPress documents these upload options and limits in its upload guidance.
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- Open Media > Add New and note the maximum upload size displayed.
- If the multi-file uploader is not working, use the Browser Uploader link on that screen and try the file again.
- If the file is blocked by the limit, or uploads still fail, open Tools > Site Health > Info and review the Media Handling and server information. Ask your host to confirm the applicable upload limits and file-upload status.
- If the host identifies a permissions problem, ask it to check whether the
wp-contentdirectory has the permissions WordPress requires. WordPress’s file permissions guide describes the relevant directory permissions.
Upload limits and server settings vary by host, so there is no single PHP setting that is the right fix for every WordPress site.
Why is WordPress cropping my images or showing the wrong size?
WordPress can create several image sizes from an upload. The image shown on the page may be a generated thumbnail or another resized version rather than the full original. Before editing the source, check the inserted size and the theme’s content width.
Check the inserted image size
In the editor, select the image and inspect its size or dimensions in the block settings. In the Classic Editor, the image insertion options let you select an available size. The chosen size affects which generated version WordPress uses; the theme may also constrain how wide it appears. See WordPress’s image guidance and image insertion instructions.
Check thumbnail dimensions and crop behavior
Go to Settings > Media to review thumbnail dimensions and whether thumbnails are cropped to exact dimensions. The default thumbnail size is 150px × 150px, but administrators can change it. A square thumbnail crop can therefore look different from the original, even when the uploaded file is correct. WordPress explains these options in its media editing documentation.
Edit only when the source itself needs changing
Open the image in the Media Library and choose Edit Image to crop, scale, or rotate it. WordPress lets you choose whether the edit applies to all sizes, the thumbnail only, or all sizes except the thumbnail. Use this carefully: changing all sizes can affect other placements of the same image.
Why are my images blurry in WordPress?
Compare the uploaded file’s pixel dimensions with the dimensions at which the image is displayed. A small source image stretched across a wide content area can look blurry. Resolution (pixel dimensions) is separate from file size: a compressed file can still have enough pixels, while a large file measured in megabytes can still be too small for its display dimensions.
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There is no universal pixel target that works for every WordPress theme and placement. Check whether the editor is using a thumbnail, medium, large, or full-size version, then compare that version’s dimensions with the displayed image. WordPress notes that resizing may leave an image slightly out of focus; sharpening can help in some cases. Its image guidance discusses image quality and formats.
Why is my image broken on my WordPress site?
If you inserted an image by URL rather than uploading it, WordPress depends on that external file continuing to exist and remain accessible. Open the image’s source URL directly. If it no longer loads, the owner moved or deleted the file, or sharing access changed, the image can disappear from your page.
To remove that dependency, select the image block and use Upload to Media Library to save a local copy, if the control is available. WordPress describes the Image block and its URL-based image options in its Image block documentation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why aren’t WordPress thumbnails or other image sizes generating?
WordPress relies on server-side image processing to create resized images. Open Tools > Site Health > Info > Media Handling and check which image editor is active and whether GD or Imagick (ImageMagick) is available. WordPress identifies GD as necessary for the image-size feature described in Media Settings; Imagick availability depends on the host. These details help distinguish a processing issue from a theme or plugin issue, but they do not identify every cause by themselves. See the Site Health documentation and Media Settings documentation.
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- If an image editor is unavailable or reports an error, ask the host to check the server’s image-processing support.
- If processing is available but only certain image sizes are missing, check the theme or plugins that define or use those sizes. WordPress’s core documentation does not establish one universal fix for every theme and plugin combination.
Does image file size affect quality or page layout?
Keep three measurements separate: file size in bytes, source resolution in pixels, and displayed dimensions in the page layout. If the image looks soft, investigate pixel dimensions and resizing; if the upload is rejected, investigate the host’s upload limit; if the page feels heavy, compare export file sizes and choose an appropriate image format. WordPress recommends comparing format and export results rather than assuming one format is always best.
An image optimization tool may be relevant when the actual problem is oversized files, but it will not fix an incorrect crop, a low-resolution source, or an upload limit imposed by the host. WordPress’s image guidance does not endorse a particular optimization plugin or service.
Quick Recap
A quick way to narrow down the cause
- Looks cropped: compare the original with the generated thumbnail or other inserted size, and inspect Media Settings’ crop option.
- Looks blurry: compare the selected file’s pixel dimensions with its display dimensions.
- Will not upload: try the Browser Uploader and check the host-set limit shown on Media > Add New.
- Has disappeared: check whether the external image URL still loads; upload a local copy to avoid depending on it.
- Generated size is missing: inspect Site Health’s Media Handling details, then check host processing support and any theme or plugin that defines the size.
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