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WordPress Image Optimisation Plugin

Make every image lighter & smarter.

SEO Image Optimiser compresses your images into next-gen formats and auto-generate AI-powered alt tags and titles that describe the image in natural language – boosting Core Web Vitals and SEO with zero extra effort.

Start optimising in minutesView features
✓ Image compression & conversion to WebP/AVIF✓ AI alt text & title generation✓ Bulk optimisation for media libraries
Before and after comparison of an optimised website image
Before and after comparison of an optimised website image
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Unoptimised JPEG – 1.15 MB
Optimised WEBP – 265 KB

Drag the slider to see how SEO Image Optimiser reduces file size while keeping the image sharp.

📦
–80%
Average file-size reduction*
🚀
+28%
Improvement in LCP timings*
🧠
100%
Images with AI-ready alt text
🪄
1-click
Bulk optimisation & restore

*Typical results from optimising existing WordPress media libraries. Actual savings depend on originals.

Why it works

Built for performance, written for search engines.

SEO Image Optimiser combines image optimisation with AI-driven descriptions, so your site loads fast and your content is understandable to search engines and assistive tech.

⚡

Smart image compression

Compress large JPEG and PNG files without visible quality loss. Set the compression level at a site level, or choose the compression level per image.

  • Convert to WebP & AVIF
  • Automatic resizing on upload
  • Bulk optimise existing media
🧠

AI-generated alt tags & titles

Our AI scans each image and generates human-sounding alt text and SEO-friendly titles that describe the real content of the image.

  • Descriptions tailored to the image purpose
  • Improves accessibility & SEO
  • Available for Lite, Pro & Unlimited Subscription with variable quota
📊

Core Web Vitals ready

Faster images means better LCP and INP scores. Keep an eye on your gains with simple before/after stats inside WordPress.

  • Per-image and global savings
  • Safe restore to original
  • Works with your existing theme
🧩

Simple WordPress Integration

Plug and play with your current stack. No templates to rebuild, no complex CDN setup — keep control of your media.

  • Background Processing
  • Multisite compatible
  • Simple one click bulk optimisation
AI for real-world SEO

Never publish another image without meaningful alt text.

Google, screen readers and AI tools all rely on descriptive text to understand your media. SEO Image Optimiser analyses each image and generates alt text and titles that sound natural and stay on-brand.

  • Add your own keywords and text
  • Manually update AI suggestions before they are saved
  • Bulk-update legacy titles and alt tag for images in a few clicks
AI Alt Tag Generation
Pricing

Simple, transparent plans for growing sites.

Start free and upgrade only when you need to optimise more images or unlock AI-powered alt tags and titles.

Lite

Free

Get started with optimisation – no card required.

  • Free licence – just requires an email address
  • 100 image conversions to WebP every month
  • Front-end serving of WebP images
  • Up to 30 AI alt tag & title generations each month
  • Use on a single WordPress site
£0
Start with Lite
Best Value

Unlimited

Everything in Pro, with unlimited installs.

  • Unlimited image conversions
  • WebP & AVIF for every image
  • Up to 10,000 AI alt tag & title generations each month
  • Use on unlimited WordPress sites
  • Background processing & bulk optimisation
£99 / year
Get Unlimited
Growing Portfolio

Pro

For busy blogs and stores that live on images.

  • Unlimited image conversions
  • Convert to both WebP & AVIF
  • Up to 3,000 AI alt tag & title generations each month
  • Use on up to 5 WordPress sites
  • Background processing & bulk optimisation
£49 / year
Upgrade to Pro

Feature comparison at a glance

Feature
Lite
Pro
Unlimited
Image conversions
100 images to WebP
Unlimited
Unlimited
AI alt tags & titles
Up to 30 generations a month
Up to 3,000 generations a month
Up to 10,000 generations a month
Supported formats
WebP only
WebP & AVIF
WebP & AVIF
Number of sites
1 site
Up to 5 sites
Unlimited sites
Front-end WebP delivery
✓
✓
✓
Price
Free
£49 / year
£99 / year

Ready to give your images a smarter glow-up?

Drop SEO Image Optimiser into your existing WordPress stack and start shipping faster, more discoverable pages today.

Get Started
Get in Touch