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Kraken.io Image Optimizer – Compress, Convert to WebP & AVIF, Resize & Bulk Optimize

v3.0.3

by Kraken.io · updated 4 months ago

Optimize images automatically — compress, resize and convert to WebP, AVIF & more with Kraken.io. Faster pages, smaller files, same quality.

AVIFcompress imagesconvert webpimage optimizationoptimize images
WordPress.org SaveAnalyze reviews Track this plugin
Rank
#1,584
Down2 vs yesterday
Active installs (est.)
≈ 16,000
10K+ reported · Medium
Total downloads
424.6K
424,565 all-time
Rating
4.5/5
119 reviews
Support resolved
–
0 of 0 threads, last 2 months
Growing·Downloads +17.6% (30d)·Toward 20K+ · ETA ~43d

Kraken.io Image Optimizer at a glance

Kraken.io Image Optimizer is a WordPress plugin by Kraken.io with 10K+ active installs, the #1,584 most popular plugin on WordPress.org. On a typical day it’s downloaded about 97 times, 18% more than the month before. It’s rated 4.5 out of 5 from 119 reviews. Version 3.0.3 came out on Jun 22, 2026 and is tested up to WordPress 7.0.8. Among the 144 plugins tagged “AVIF”, it ranks #7. It was first released in 2014.

Chart time range

Applies to every chart below. History from Oct 10, 2026, 31 days.

Showing the last 30 days. Full history comes with any paid plan.See plans

Downloads over time

Download stats

4.5K downloads · the last 30 days

Downloads over time
Kraken.io Image Optimizer Compare series
Downloads over time: 30 days across 1 series.0200400600Oct 10Oct 15Oct 20Oct 25Oct 29Nov 3Nov 8Oct 29, 2026: Tested up to 7.0.8
View as table
DateKraken.io Image Optimizer
Nov 8, 202645
Nov 7, 202666
Nov 6, 202670
Nov 5, 202695
Nov 4, 202667
Nov 3, 2026548
Nov 2, 2026631
Nov 1, 2026278
Oct 31, 2026311
Oct 30, 2026220
Oct 29, 202699
Oct 28, 2026106
Oct 27, 202674
Oct 26, 202673
Oct 25, 202676
Oct 24, 202658
Oct 23, 2026149
Oct 22, 2026236
Oct 21, 2026134
Oct 20, 2026126
Oct 19, 2026183
Oct 18, 2026114
Oct 17, 2026146
Oct 16, 202660
Oct 15, 202671
Oct 14, 202691
Oct 13, 202678
Oct 12, 202657
Oct 11, 202657
Oct 10, 2026158

Unusual spikes are usually updates, not new installs.

Estimated installs

≈ 15,511 · -0.3% in the last 30 days

Estimated installs
Estimated installs: 13 days across 1 series.15.4K15.5KOct 27Oct 29Oct 31Nov 2Nov 5Nov 7Nov 9Oct 29, 2026: Tested up to 7.0.8
View as table
DateEstimated installs
Nov 9, 202615,511
Nov 8, 202615,541
Nov 7, 202615,548
Nov 5, 202615,567
Nov 4, 202615,524
Nov 3, 202615,450
Nov 2, 202615,422
Nov 1, 202615,399
Oct 31, 202615,379
Oct 30, 202615,516
Oct 29, 202615,549
Oct 28, 202615,547
Oct 27, 202615,552

Rank over time

#1,584 · down 7 in the last 30 days

Popular rank
Popular rank: 15 days across 1 series.#1.6K#1.6K#1.6K#1.6KOct 16Oct 27Nov 1Nov 5Nov 9Oct 29, 2026: Tested up to 7.0.8
View as table
DateDaily snapshot
Nov 9, 2026#1,584
Nov 8, 2026#1,582
Nov 7, 2026#1,581
Nov 6, 2026#1,582
Nov 5, 2026#1,582
Nov 4, 2026#1,587
Nov 3, 2026#1,595
Nov 2, 2026#1,601
Nov 1, 2026#1,605
Oct 31, 2026#1,608
Oct 30, 2026#1,592
Oct 29, 2026#1,588
Oct 28, 2026#1,590
Oct 27, 2026#1,590
Oct 16, 2026#1,577

Growth %

Average -0.02% a day in the last 30 days

Growth %, day over day
Growth %, day over day: 12 days across 1 series.-0.5%0%0.5%Oct 28Oct 30Nov 1Nov 3Nov 5Nov 7Nov 9
View as table
DateGrowth
Nov 9, 2026-0.19%
Nov 8, 2026-0.04%
Nov 7, 2026-0.06%
Nov 5, 2026+0.28%
Nov 4, 2026+0.48%
Nov 3, 2026+0.18%
Nov 2, 2026+0.15%
Nov 1, 2026+0.13%
Oct 31, 2026-0.88%
Oct 30, 2026-0.21%
Oct 29, 2026+0.01%
Oct 28, 2026-0.03%

Active installs band

10K+ on WordPress.org

Active installs (rounded band)
Active installs (rounded band): 15 days across 1 series.9.5K10K10.5KOct 16Oct 27Nov 1Nov 5Nov 9Oct 29, 2026: Tested up to 7.0.8
View as table
DateDaily snapshot
Nov 9, 202610K+
Nov 8, 202610K+
Nov 7, 202610K+
Nov 6, 202610K+
Nov 5, 202610K+
Nov 4, 202610K+
Nov 3, 202610K+
Nov 2, 202610K+
Nov 1, 202610K+
Oct 31, 202610K+
Oct 30, 202610K+
Oct 29, 202610K+
Oct 28, 202610K+
Oct 27, 202610K+
Oct 16, 202610K+

Search rankings

Where it appears in WordPress.org search for the searches you track, checked every day.

See where Kraken.io Image Optimizer ranks in search

Track this plugin to check its position for the searches you choose, daily, with an alert when it moves.

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Change log

From our daily snapshot of WordPress.org
  1. Rank #1590 → #1582Downloads +43.2%
    • Tested up to 7.0.7 → 7.0.8

Versions in use

Share of active installs on each published version, from WordPress.org.

  • v2.645%
  • v3.044%
  • v2.710%
  • Other0.4%

Rating trend

4.5★★★★★119 reviews · steady in the last 30 days

Requirements & info

Version history
Version
3.0.3
Requires WordPress
4.9
Tested up to
7.0.8
Requires PHP
5.6
First released
Feb 24, 2014
Last updated
Jun 22, 2026
Releases, last 12 months
…

Questions about Kraken.io Image Optimizer

How many websites use Kraken.io Image Optimizer?

Kraken.io Image Optimizer is active on 10K+ WordPress sites, as WordPress.org reports it. WordPress.org rounds the number down, so the real count is somewhat higher. That makes it the #1,584 most popular plugin on WordPress.org.

How many times has Kraken.io Image Optimizer been downloaded?

424,565 times in total since 2014. On a typical day it’s downloaded about 97 times. See download stats

When was Kraken.io Image Optimizer last updated?

Version 3.0.3 came out on Jun 22, 2026 (4 months ago). See every release

Is Kraken.io Image Optimizer compatible with the latest WordPress?

It’s tested up to WordPress 7.0.8, one version behind the current 7.1. Authors often update this line a few weeks after a release.

Does Kraken.io Image Optimizer have known security vulnerabilities?

None that affect the current version. WPVulnerability’s database lists 3 older issues, fixed in earlier versions, so keep Kraken.io Image Optimizer up to date. See its security record

Is Kraken.io Image Optimizer still maintained?

Yes. Its last release was 4 months ago. No support threads were opened in the last two months.

What rating does Kraken.io Image Optimizer have?

4.5 out of 5 from 119 reviews on WordPress.org. 84% of them give 5 stars.

What are the best alternatives to Kraken.io Image Optimizer?

The plugins most like Kraken.io Image Optimizer, by the tags they share, are Smush (1M+), Imagify Image Optimization (900K+) and Converter for Media (500K+). Compare all alternatives

Latest reviews

Analyze reviews
All reviews on WordPress.org

Review stats

4.5

★★★★★

119 reviews

  • 5 stars: 100 reviews, 84%
  • 4 stars: 6 reviews, 5%
  • 3 stars: 1 reviews, 1%
  • 2 stars: 2 reviews, 2%
  • 1 stars: 10 reviews, 8%
Positive
89%4–5★
Mixed
1%3★
Critical
10%1–2★
  • About 1 more 5★ reviews would lift it to 4.6.
  • Each new 1★ review takes 8 five-star reviews to balance out.

Compare with competitors

Add up to 1 competitor. No account needed.

Starter · 1 competitor
Kraken.io Image Optimizer
Suggested:
Metric
Kraken.io Image Optimizer
Estimated installs≈ 16,000
Reported installs10K+
Rating4.5
Reviews119
Total downloads424.6K
AuthorKraken.io
First releasedFeb 24, 2014
Version3.0.3
Requires WP4.9
Requires PHP5.6
Last updatedJun 22, 2026

Alternatives to Kraken.io Image Optimizer

Compare all alternatives

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Side by side:Kraken.io Image Optimizer vs SmushKraken.io Image Optimizer vs Imagify Image OptimizationKraken.io Image Optimizer vs Converter for Media