ShortPixel

ShortPixel has been compressing images on the web for years, and at this point the numbers are hard to argue with: 32 billion images optimized, over a million websites using it, and consistent top rankings in independent compression tests. For JPEG files specifically, it regularly outperforms competitors by a significant margin, achieving around 54% file size reduction compared to the 20-40% typical elsewhere.

The core function is straightforward. You point ShortPixel at your images, it compresses them, and your site loads faster. It handles JPG, PNG, GIF, WebP, AVIF, and even PDF files. Three compression modes cover most use cases: lossy for maximum size reduction, lossless for when you can't afford any quality loss, and glossy, which is ShortPixel's own middle-ground algorithm that aims for the smallest file size without visible quality degradation.

The WordPress plugin is where most users encounter it. It installs, connects to your ShortPixel account, and can bulk-optimize your entire media library in the background. It plays well with WooCommerce, NextGEN Gallery, and most other WordPress plugins. For non-WordPress setups, there's a web API and a standalone tool.

AI features are built in rather than bolted on. Smart cropping uses AI to identify the main subject in an image and center it intelligently when resizing, which matters for product images and portraits where a simple center crop cuts off faces or key details.

Pricing is credit-based. New accounts get 100 free credits per month, which is enough for testing or a very small site. The unlimited plan runs $9.99 a month and removes the credit ceiling while adding 500GB of CDN traffic. One-time credit packs are also available from $19.99, with credits that never expire, which makes sense if your image volume is irregular.

The credit model is the most common frustration in reviews. Heavy sites or those doing frequent bulk imports can burn through credits quickly. It's not a deal-breaker, but worth calculating before committing.

For WordPress site owners who care about page speed and Core Web Vitals, ShortPixel is one of the most proven options available.

Key Features

• Lossy, lossless, and glossy compression algorithms for JPEG, PNG, GIF, WebP, AVIF, and PDF
• Automatic conversion to WebP and AVIF next-gen formats
• AI-powered SmartCompress for optimal quality-to-size balance
• AI smart cropping with subject detection for accurate image resizing
• Bulk and background optimization via WordPress plugin
• One-click restore to original images
• EXIF data management and removal
• Compatible with WooCommerce, NextGEN Gallery, and major WordPress plugins
• Web API for non-WordPress integrations
• 100 free credits per month on free plan
• Unlimited plan with CDN traffic from $9.99/month
• One-time credit packs with no expiry from $19.99
• 32 billion images optimized across 1 million websites