WP Smush is one of the most-installed image optimization plugins for WordPress, and its free version is more capable than most freemium plugins: unlimited bulk compression, lazy load, and Directory Smush for images outside the media library. What it won’t do for free is compress your original full-size images, convert them to WebP or AVIF, or serve them from a CDN — all of which sit behind Smush Pro.
Get WP Smush Pro: Visit the official WP Smush Pro page →
At a Glance
| Tier | Sale Price | Sites | CDN Traffic | Best For |
|---|---|---|---|---|
| Free | $0 | Unlimited | None | Lossy/lossless compression on resized images, up to 5MB each |
| Pro Basic | $36/yr | 1 | 50GB | Full-size compression, WebP/AVIF, on a single site |
| Pro Standard | $60/yr | 3 | 100GB | Small agencies with a few sites |
| Pro Plus | $120/yr | 10 | 250GB | Larger agencies and multi-client use |
| Premium | Not listed | Unlimited | 500GB | Unlimited sites under one license |
Active installs: 1,000,000+ | Rating: 4.8/5 from 6,053 reviews on WordPress.org | Pro Basic/Standard/Plus prices shown are WPMU DEV’s current sale prices (listed against higher original prices on their pricing page).
Short Verdict
Free Smush is genuinely useful on its own: it removed its old 50-image bulk-smush cap, keeps lazy load and Directory Smush, and handles both lossy and lossless compression up to 5MB per image. The catch is that it only touches the resized copies of your images, not the original full-size file sitting on your server — a meaningful gap if your media library is full of unresized uploads. Pro closes that gap and adds WebP/AVIF conversion and a CDN, and at $36/year for one site, it’s one of the cheaper Pro upgrades in the WordPress plugin space.
What It Is
WP Smush, built by WPMU DEV, compresses images to reduce file size and page weight without a visible quality hit. It works automatically on new uploads and can bulk-process an existing media library. Smush Pro can be purchased as a standalone plugin license through WPMU DEV; the page doesn’t require a separate hosting plan to use it.
Free vs. Pro: What Actually Changes
- Full-size image compression: free Smush skips your original uploaded file and compresses only the resized versions WordPress generates. Smush Pro compresses the original too, up to 256MB (versus the free version’s 5MB cap on resized images).
- WebP and AVIF conversion: Pro-only. Free Smush does not convert or automatically serve next-gen formats.
- Image CDN: Pro-only, delivered through 119 servers globally, with bandwidth capped by tier (50GB on Pro Basic up to 500GB on Premium).
- Automatic resizing and image preload: both marked Pro-only on WPMU DEV’s own feature breakdown.
- Bulk Smush and Directory Smush: both free, with the old 50-image bulk cap removed in a recent update.
- Lazy load: free on all tiers.
In short: free Smush is a real compression tool, not a stripped-down demo, but it’s compressing the wrong file if your theme or page builder serves full-size images directly rather than WordPress’s auto-generated thumbnails.
Pros
- Free version has no bulk-smush image-count limit and supports both lossy and lossless compression.
- 1 million+ active installs and a 4.8/5 rating across more than 6,000 reviews.
- Pro Basic at $36/year for one site undercuts several competing premium image plugins.
- Directory Smush (compressing theme and plugin images, not just the media library) is free on every tier.
Cons
- Free version never touches your original full-size image file, only the resized copies.
- No WebP or AVIF conversion without upgrading — a real gap given how much page-speed advice centers on next-gen formats.
- CDN bandwidth is tier-capped even on Pro (50GB on the cheapest paid plan), so a high-traffic site may need Pro Plus or Premium.
- Premium’s price isn’t published, so comparing the unlimited-site tier against competitors requires contacting WPMU DEV directly.
Who It’s a Good Fit For
Blogs and small sites that upload correctly-sized images and mainly need ongoing compression and lazy load will do fine on the free version indefinitely. Anyone running page-speed audits that flag “serve images in next-gen formats” or “properly size images” needs Pro to actually fix those warnings, since WebP/AVIF conversion and full-size compression are the specific features free Smush lacks.
Who Should Look Elsewhere
If a built-in CDN and automatic next-gen formats matter more than price, it’s worth comparing against ShortPixel and Imagify, both of which bundle WebP conversion into cheaper entry tiers than Smush Pro Basic — a comparison covered in this site’s broader image optimization plugin roundup.
Bottom Line
WP Smush’s free tier is one of the more capable free image-optimization plugins available, but “compressed” doesn’t mean “fully compressed” until you check whether it’s touching your resized images only. If next-gen formats or full-size compression show up on a speed audit, Pro Basic at $36/year is a cheap fix.
How WP Smush Compares to ShortPixel and Imagify
The clearest gap between Smush and its two closest rivals is next-gen format conversion: both ShortPixel and Imagify include WebP and AVIF conversion on their free tiers, while Smush reserves that feature for Pro entirely. The trade-off is quota: Smush’s free tier has no monthly image cap at all, while Imagify’s free Starter plan tops out around 200 images a month and ShortPixel’s free tier gives 100 optimization credits a month that expire after 30 days (and a single photo’s thumbnails can use several credits at once). On price, Imagify’s Growth plan runs $4.99/month billed yearly for about 5,000 images across unlimited websites on one account, and ShortPixel’s Unlimited plan runs $8.33/month billed yearly for unlimited images — both priced as a flat account fee rather than Smush Pro’s per-site licensing, where Basic covers only 1 site for $36/year. For the full breakdown of all four plugins’ free-tier quotas and paid pricing, see our WordPress image optimization plugin roundup.
| Spec | WP Smush | ShortPixel | Imagify |
|---|---|---|---|
| Free-tier WebP/AVIF | No — Pro only | Yes | Yes |
| Free-tier quota | Unlimited (no monthly cap) | 100 credits/month, expire after 30 days | ~200 images/month (20MB quota) |
| Entry paid price | $36/yr (Pro Basic), 1 site | $8.33/mo billed yearly (Unlimited) | $4.99/mo billed yearly (Growth, ~5,000 images/mo) |
| Licensing model | Per-site (1 site on Basic) | Per account | Per account, unlimited sites |
| Best for | Unmetered free bulk compression plus a broader WPMU DEV toolkit | Pay-as-you-go sites that upload images infrequently | Multi-site accounts wanting free WebP/AVIF |
Frequently Asked Questions
- Is WP Smush free forever? Yes — the free plugin has no expiration and no bulk-smush image-count limit, but it never compresses your original full-size files or converts images to WebP/AVIF, no matter how long you use it.
- Does WP Smush convert images to WebP? Only on Pro ($36/year and up); the free version does not convert or serve next-gen formats at all.
- Is WP Smush worth it if I only need basic compression and lazy load? Yes — both are free on every tier, so there’s no reason to pay unless a speed audit specifically flags next-gen formats or full-size image compression.
- Does Smush’s free tier do everything ShortPixel and Imagify do for free? No — Smush skips WebP/AVIF conversion on free, which both ShortPixel (100 credits/month) and Imagify (~200 images/month) include for free, though both of those come with a monthly cap that Smush’s free tier doesn’t have.