SlashImage – Image Optimizer: Compress Images, Convert WebP & AVIF
by SlashImage · Performance
Automatically compress every image and serve WebP and AVIF to every visitor. Small files, the quality you choose, zero manual work.
Try it live opens a temporary test site in your browser, which can take about 20 seconds to load. Plugins that rely on outside services or a full server may not work completely there.
Health
B 83/100
Few reviews
Active installs
90+
≈91 estimated
Momentum
-12%
downloads vs prior 30d
Biggest opportunity: Swap “avif” for “convert webp”. “avif” isn't earning its slot: you're not in the first 24 results for its own search. “convert webp” sits at #24 untagged, close enough for a declared tag to move it up. All five slots are taken, so one has to go.
83 health vs 69 average across 1,808 Performance plugins
Install conversion
How it's measured →7.7%
of downloads still active
At least 90 of 1.2K lifetime downloads are still running, above its category: the median Performance plugin keeps 1.4%, across 1,103 plugins.
Downloads count every update, not just first installs, so older and more frequently released plugins read lower. Compare against other Performance plugins, not across the directory. wp.org reports active installs as the bottom of a band, so the real rate is this or higher.
This plugin shipped 6 releases in the last 12 months, and every existing install that updated counted as another download. wp.org publishes no split between first installs and updates, so we show the raw rate rather than guess at one.
Details
Directory ranking optimization
How it's scored →How well this listing is tuned to rank in WordPress.org search, on the factors an owner controls. Not popularity, optimization.
Excellent listing optimization
Most to gain: Rating quality
Updated 33 days ago
Tested up to WordPress 7.1.4, the current branch or newer
5.0★ over 1 review, smoothed to 4.12★ and held back under 25 reviews
5 of 5 tags set · short description in place
To rank higher: Too few reviews to rank on quality — nudge happy users to leave one.
Get the full rank-higher report →Search visibility
How it's tracked →Directory searches this plugin turns up in, and which way each one is moving. WordPress.org publishes no history of search positions, so this starts the day we first tracked a keyword and never backfills.
39
Momentum
Losing ground
-0.3
Velocity
places per keyword, 19d
23%
Breadth
of keywords climbing, 19d
-0.3
Acceleration
recent half vs earlier
wp.org is where the directory puts the plugin for that search. On merit is where it would sit if results were ranked on rating, support and updates, without the install boost. The last column is how far the wp.org position moved, from our first reading in the last 90 days to the latest.
| Keyword | wp.org | On merit | wp.org move, 90 days |
|---|---|---|---|
| compress images your tag | #24 | #24 | 0 |
| convert webp | #24 | #24 | 0 |
| post id optimizer | #21 | #23 | up 1 |
| compress image | #24 | #24 | 0 |
| avif your tag | Not in the top 24 | ||
| image optimization your tag | Not in the top 24 | ||
| optimize images your tag | Not in the top 24 | ||
| webp your tag | Not in the top 24 | ||
15 searches this plugin appeared in over the last 90 days, 4 listed. 11 left out as unrelated or noise (years, numbers, stray words). 4 of its tags aren't in the top 24 for their own search.
What to do about it
- Swap “avif” for “convert webp”. “avif” isn't earning its slot: you're not in the first 24 results for its own search. “convert webp” sits at #24 untagged, close enough for a declared tag to move it up. All five slots are taken, so one has to go.
Daily downloads
Since 10 Jul 2026 · 113 days · wp.org + Plugin Pulse archive
30-day downloads
Rolling 30-day volume · peak 412 · peaks are release surges
Directory rank
Ranked about #16,800 to #17,400, alongside the other plugins at 90+ installs. Plugins with the same install count swap places between wp.org requests, so this is where most of them sit. Checked monthly, last on 21 Oct 2026.
Health trend
Composite health score, snapshotted daily
Update activity
Downloads in the last 30 days for every 1,000 active sites.
Not enough installs to measure. This needs at least 100 active sites; below that, a handful of downloads reads as tens of thousands.
Release cadence
Actively maintainedHow often this plugin actually ships. A steady rhythm is the maintenance signal a single "last updated" date can't show.
6
releases in the last 12 months
1mo ago
latest release · v1.2.2 · 28 Sep 2026
6
tagged releases on record
Recent releases
What its installed base runs
via wordpress.orgShare of active installs on each version of this plugin. Green is the current release; a big slice on older versions is a user base that has stopped updating.
Estimated active installs
The public count shows “90+”. Our estimate pins where the real number sits.
Crossed into this band 51 days ago and a band this size takes about a year or more to cross, so the real count is still just over 90.
Install history since 9 Jul 2026
Languages
via translate.wordpress.orgTranslated into 7 languages, 2 at 90% or more
AI assistants
How it's measured →Whether ChatGPT and Claude name this plugin when asked the category question, and whether the readme gives them something to quote.
Not measured yet for this plugin’s topics. Its tracked searches are not among the measured topics. See the topics measured so far.
Readme readiness
7 of 8 pass · checked 28 Oct 2026Can an assistant quote this readme? Eight deterministic checks over the wp.org listing, no model involved.
- ✓ Says what it does "Automatically compress every image and serve WebP and AVIF to every visitor. Small files, the quality you c..."
- ✓ Has a FAQ 17 questions in the FAQ.
- ✓ FAQ asks real questions 17 of 17 read like questions a user would type.
- ✓ Names who it is for Names its audience or use cases ("made for", "built for").
- ✓ Names what it works with Mentions WooCommerce, Elementor, Yoast, Cloudflare and 2 more.
- ✓ Headings and lists 11 headings and 2 lists.
- ✓ Enough to quote 5,316 characters of description.
- ! Tags match the text Only 2 of 5 tags appear in the text ("compress images", "image optimization", "optimize images" missing).
Growth timeline
Install-tier crossings we have observed, and how long each tier took to outgrow
- 2026-09-10 80+ → 90+ up after 9 days in tier
- 2026-09-01 30+ → 80+ up after 25 days in tier
- 2026-08-07 10+ → 30+ up
Competes with
The plugins that solve the same job, ranked by shared tags then reach, closest match first. The letter on the right is each plugin's health grade (A best, F worst).
-
Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization 200K+ installs · 4.7★ · 5 shared tags A -
Robin Image Optimizer – Unlimited Image Optimization, WebP & AVIF 100K+ installs · 4.4★ · 5 shared tags A -
Converter for Media – Optimize images | Convert WebP & AVIF 500K+ installs · 4.9★ · 4 shared tags A -
Kraken.io Image Optimizer – Compress, Convert to WebP & AVIF, Resize & Bulk Optimize 10K+ installs · 4.5★ · 4 shared tags A -
MegaOptim Image Optimizer – Convert to WebP & AVIF, Compress Images Locally 100+ installs · 4.7★ · 4 shared tags A -
DropAvif Image Optimizer – Convert WebP & AVIF | Compress Images 80+ installs · 4.2★ · 4 shared tags B
Embed this report card
Drop a live Pulse card for SlashImage – Image Optimizer: Compress Images, Convert WebP & AVIF into a readme, a review or a deck. It updates itself.
<iframe src="https://plugins.wpmayor.com/embed/slashimage-image-optimizer" width="480" height="300" style="border:0" loading="lazy" title="SlashImage – Image Optimizer: Compress Images, Convert WebP & AVIF — Plugin Pulse"></iframe> SlashImage – Image Optimizer: Compress Images, Convert WebP & AVIF: 90+ active installs, 5.0★ (1 reviews). Plugin Pulse (WP Mayor), as of 2026-10-31. https://plugins.wpmayor.com/plugin/slashimage-image-optimizer
Spotted a number that looks wrong? Report a data issue and we'll check it against the source.