CompressX — AVIF & WebP Converter, Media Replacement

83 Quality Score

Active Installs

21/30

At 40,000 active installs, CompressX has a moderate user base that is far smaller than category leaders like Smush or Imagify, which each exceed 1 million installs.

Update Freshness

25/25

The plugin was updated on 2026-05-27, within days of this assessment, and requires only WordPress 5.8 and PHP 7.0, signalling active upkeep and broad compatibility.

User Rating

15/15

All 189 reviewers gave it a perfect 5-star average, yielding a flawless 100/100 user rating score, though the sample size is modest.

Support Health

8/15

Only 2 support threads exist and both are resolved, which is technically ideal but too small a sample to draw strong conclusions about long-term support responsiveness.

WP Compatibility

15/15

It is tested against WordPress 7.0 and supports PHP 7.0+, earning a full compatibility score and indicating the developer keeps pace with WordPress core releases.

Scores higher than 91% of indexed plugins

About

AVIF & WebP converter with built-in media replacement for local image optimization.

Active Installs 40k+

Rating ★★★★★ 5/5

Last Updated 2026-07-29 7:43am GMT

Requires WordPress 5.8+

Tested Up To 7.0.6

Requires PHP 7.0+

✓ No known vulnerabilities

What It Does

CompressX converts your existing JPEG and PNG images into the modern AVIF and WebP formats to reduce file sizes on your server and improve page load times. It also includes a built-in media replacement tool, so you can swap out original images directly from the WordPress media library without needing a separate plugin. Conversion runs locally on your own hosting, with no external API or ongoing subscription fees.

Who It's For

This plugin is best for site owners who want next-gen image formats (AVIF and WebP) without paying monthly fees to a SaaS service like ShortPixel or Imagify. It suits photography portfolios, e-commerce stores, and content-heavy sites where every kilobyte of image weight matters and the host has enough CPU to handle local conversion.

Who Should Skip It

If you are on a managed WordPress host with strict CPU limits, or you need bulk optimization across tens of thousands of images in one click, a cloud-based optimizer with dedicated infrastructure will be faster and more reliable. Users who only need lazy loading or basic lossy compression are also overbuying with this tool.

The Bottom Line

CompressX is a solid, well-maintained local AVIF and WebP converter that scores 83.11/100 and costs nothing to run beyond your own server resources. Its perfect user ratings and active development are genuine strengths, but the small install base and tiny support thread history mean you are betting on a younger project. If local conversion fits your hosting setup and you value the included media replacement tool, it is a sensible choice; otherwise the million-install incumbents carry less risk.

Pick Smush when you want an all-in-one bundle that also handles lazy loading and has a proven track record at over 1 million installs.

EWWW Image Optimizer 89/100

Choose EWWW when you want local conversion with more granular control over compression levels and a much larger install base for community-tested stability.

Converter for Media – Optimize images | Convert WebP & AVIF 88/100

Pick Converter for Media when you only need format conversion without bulk compression and want a lighter plugin footprint at 500,000 installs.

Imagify Image Optimization 87/100

Choose Imagify if you prefer a polished SaaS workflow with offloaded processing and do not mind monthly quotas or subscription costs.

ShortPixel Image Optimizer 86/100

Pick ShortPixel when you want cloud-based compression that scales effortlessly on weak shared hosting and you are fine paying per-image credits.

Use Cases

photography portfolio online magazine image-heavy blog real estate listings travel website food blog fashion e-commerce news website graphic design agency stock photo marketplace