HD images become blurry after uploading to WordPress? How to restore the clarity of the original image

Obviously high-resolution, finely retouched images, once uploaded to the WordPress It's not your fault, it's WordPress' "compression habit". Don't worry, it's not your fault, it's WordPress' "compression habit". The good news is that it can be fixed, and it's easy.

Today we will take you step by step to figure out: why HD pictures are blurred, what settings affect the sharpness, how to upload "original" pictures.

First, WordPress Why does it make images blurry?

A few common causes are listed below:

WordPress automatically compresses JPEG Image quality, generally compressed to 82%
The system automatically generates thumbnails of different sizes according to the media settings
The theme or plugin calls not the original image, but a cropped version
CDN or the caching plugin has image compression turned on

Second, a few steps to manually restore the high-definition map

Here are a few steps, set them up in order and the picture will be back to clear.

Step 1: Disable WordPress Default Compression

Go to the topic file functions.php, add the following code to make the WordPress Stop compressing images:

add_filter('jpeg_quality', function($arg){ return 100; });

This code will cause the JPEG image to retain its original quality for uploading and no longer be compressed.

Step 2: Turn off automatic thumbnail generation

Backend → Settings → Media, change Thumbnail, Medium Size, Large Size to 0The

With this setup, WordPress will no longer generate crop images, saving space and avoiding blurring.

Step 3: Select "Full Size" when inserting the image.

After uploading an image, remember to select "full size" on the right when inserting it in the editor. If you use a medium size or thumbnail, it will look worse on the page.

Step 4: Disable Image Compression for Caching Plugins or CDNs

If used WP RocketFor tools like LiteSpeed Cache, Cloudflare, etc., you can go to their settings and turn off the image compression option.

Refresh the page again and see if the picture is much clearer.

Step 5: Choose the right compression plug-in

Some images are so large that uploading them directly will slow down the site. There are options like ShortPixelIf you want to compress your images in a lossless way, you can use the Imagify or TinyPNG plug-ins to reduce the file size and preserve the clarity of your images.

III. Suggestions for image size before uploading

It is not necessary to upload the original 6000 pixel image, and it is generally recommended to crop it as needed before uploading:

Banner: width 1920px or so
Blog with image: 1200px
Product image: around 800px

Save space without losing visual appeal.

concluding remarks

High Definition Image Upload WordPress Blurring afterward is a problem that many people encounter. But as long as the above steps to adjust, the picture will be able to restore the original clarity. The operation is not complicated, the effect is also very obvious. If your website is mainly pictures, then don't be blurred drag behind, hands set it.

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