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Free Plugin by ShortPixel v6.5.5

ShortPixel Image Optimizer

Optimize images & PDFs smartly. Create and compress next-gen WebP and AVIF formats. Smart crop and resize.

ShortPixel Image Optimizer

The facts

Rating
4.5★ from 819
Active installs
300k+
Price
Free
Last updated
20 Aug 2026
Added
Nov 2014
Requires WP
4.8.0
Tested up to
WP 7.1
Requires PHP
7.4
Downloads
19,815,295

Our analysis

AI-assisted

ShortPixel Image Optimizer is a WordPress plugin that focuses on optimizing images and PDFs to improve website speed and SEO. It offers features like bulk compression to WebP and AVIF formats, lazy loading, and image resizing. The plugin is suitable for various website types, from personal blogs to large e-commerce stores, and is also beneficial for agencies managing multiple sites.

Additionally, ShortPixel includes AI-powered features for image SEO, such as automatic generation of ALT text and captions, as well as tools for AI image upscaling and background removal. The plugin is designed to be user-friendly, allowing for easy installation and management of image optimization tasks.

Best for: This plugin is ideal for website owners looking to enhance image performance and SEO, including bloggers and e-commerce businesses.

What it does well

  • Optimizes images and PDFs for improved website speed
  • Supports bulk compression to WebP and AVIF formats
  • Includes AI features for image SEO and background removal
  • User-friendly interface for easy management
  • Suitable for various website types and agencies

Where it falls short

  • No specific pricing details provided for premium features
  • Limited information on the extent of AI capabilities

Verdict

ShortPixel Image Optimizer provides a comprehensive solution for image optimization with useful AI features, making it a practical choice for improving website performance.

From the developer

ShortPixel's own description of ShortPixel Image Optimizer, lightly tidied.

🚀 The Ultimate Image Optimization Plugin for WordPress

⚡ Boost your site’s speed instantly! Optimize images and PDFs with one click, bulk compress to WebP and AVIF, use lazy loading, and resize images.

Increase your website’s SEO ranking, number of visitors, and ultimately your sales by optimising any image or PDF document on your website.

The ShortPixel plugin is a lightweight, user-friendly, install-and-forget solution for image optimization.
It is designed to work with any website type, whether it’s a small blog or a large WooCommerce-powered online store with tens of thousands of products.
Additionally, it’s an excellent choice for agencies, offering unlimited image optimization credits for a flat monthly fee.

🎬 Ready for a Quick DEMO of our Top Image Optimization Tool?

Test our plugin here.
Make an instant image compression test of your site or compress some images to test our optimization algorithms.

💡 Why is ShortPixel the best choice for image optimization or PDF compression?

🆕 New! Brand new AI features

  • AI Image Upscale (2x, 3x, 4x) – Upscale smaller images with high-quality AI upscaling, perfect for retina displays and crisp visuals.
  • AI Background Removal – Instantly remove background from your images with one click, ideal for creating clean product photos. After the background is removed, your image can have a transparent background or be filled with a single solid color.
  • AI Image Titles – In addition to ALT text, captions, and descriptions, you can now generate smart image titles using AI for better SEO.
  • Bulk Remove AI Data – Easily clear all AI-generated image SEO data in one go.
  • You can now add fixed text before/after AI-generated image SEO data for full consistency across your site.

🆕 New! Freshly added AI Image SEO features

  • AI-powered image SEO – Automatically generate ALT text, captions, and image descriptions for all your images.
  • Bulk mode – Mass-generate and update details for all your images.
  • Preview mode – Test and fine-tune AI results before applying new ALT texts and descriptions in bulk.
  • Multilingual – Support for 100+ languages.
  • WooCommerce – Seamless support for WooCommerce product images.
  • Unlimited credits – AI-generate image titles, captions, and more with our Unlimited plan.
  • Accessibility – Improve website accessibility by generating all the necessary metadata for each image.

Freshly added features

  • Smart Backups: Save disk space by backing up only the main image. When restoring, thumbnails are automatically regenerated based on current settings.
  • Automatic Backup Cleanup: Set rules to automatically delete old backups after a chosen period.
  • Compress WebP images – ShortPixel now also smartly compresses all your existing WebP images.
  • Added support for serving CSS, JS and fonts from our global CDN.
  • Save & Restore option for all settings – ideal for agencies and users managing multiple websites.
  • Decide whether AI bots can use your images for machine learning (ML) training, or block them entirely.
  • You can now exclude images from optimization based on their file zie, perfect for skipping very small images or large images that photographers need to keep in their original, full format.
  • Filter and select images in bulk using date-based criteria, giving you precise control over what gets optimized and when.

🌍 Faster Websites for Global Audiences

The ShortPixel plugin now includes a built-in global Content Delivery Network (CDN). This powerful feature ensures that ShortPixel-optimized WebP and AVIF images, as well as your website’s CSS and JavaScript files, are delivered quickly and efficiently to any location worldwide, minimizing delays and improving load times.

By leveraging this built-in solution, you enhance the user experience, reduce server strain, boost SEO performance, and simplify website management — all with minimal effort.

Read the full description on the official page →

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