Thumnail image not clear

I already replied to your first post. This is WordPress doing the image compression. See here how to change the quality:
https://www.wpbeginner.com/wp-tutorials/how-to-increase-or-decrease-wordpress-jpeg-image-compression/

Thank for responde Ron, but it seem like do not work. I try to test by change to another theme, the thumbnail image look very clear and beauty.

I try to test by change to another theme, the thumbnail image look very clear and beauty.

What theme?

• This reply was modified 5 years, 8 months ago by ronangelo.

https://prnt.sc/mxui08
This frontier theme
https://prnt.sc/mxukzo => this understrap theme
https://prnt.sc/mxulti => this wordplus theme from themejunkie
I like your theme and everything is so good, i just want to make the thumbnail look more clear.

Your problem does seem to be image compression. The theme does not compress images WordPress does. The link I posted above explains how to undo that. Or you could try this plugin https://www.ads-software.com/plugins/disable-jpeg-compression/

Remember to regenerate the thumbnails after so the changes are reflected. Make sure to refresh any image caching you may have like Cloudflare.

Follow your way but it not resolve my problem.