Compress Images for WordPress
Optimizing images before uploading to WordPress dramatically improves page load speed, Core Web Vitals scores, and SEO rankings. WordPress 5.8+ natively supports WebP. Use ImageSmith to compress your WordPress images before sending — free, instant, and entirely in your browser. No account needed, no watermarks. Target under 500KB for best results on WordPress.
Max size
500 KB
Format
WebP
Size
Max 1200px wide — WordPress generates thumbnails automatically
- 1Target under 200KB per image for optimal page speed scores
- 2Use WebP format — WordPress 5.8+ supports it natively
- 3Regenerate thumbnails after bulk uploading pre-optimized images
- 4Install a lazy-loading plugin to defer off-screen image loading
Compress by format
Other platforms
WordPress image compression FAQ
Download your images, compress them with ImageSmith targeting under 200KB per image, then upload to WordPress. Use WebP format for maximum compression with best quality.
WebP is the best format for WordPress 5.8 and later. It offers 25–35% smaller file sizes than JPEG with comparable quality. JPEG remains the best choice for older WordPress installations.
Smaller images load faster, directly improving Google's Core Web Vitals (LCP, FID, CLS) scores. Google uses page speed as a ranking factor, so optimized images directly boost SEO.