Cimo – Free Instant Image Optimizer & WebP Converter

How well this listing is tuned to rank in WordPress.org search, on the factors an owner controls. Not popularity, optimization.

Directory rank vs rivals

wp.org popularity rank over time · higher is better · when a rival's line climbs above yours, they've overtaken you

How often this plugin actually ships. A steady rhythm is the maintenance signal a single "last updated" date can't show.

Share of active installs on each version of this plugin · 54% run the current release. Green is the current release; a big slice on older versions is a user base that has stopped updating.

Modeled within the band wp.org reports; tightens as we track daily.

At the current install trend, crossing 20K+ in roughly 384 days.

No paid tier is visible, so we don't put a figure on revenue or sale value: that would be guessing. The install base is a real asset to an acquirer, just not one public data lets us price. The recent download trend is too spiky to read.

1. ★★★★★ fabiankunz01

   3mo ago

   + Image Conversion happens for free inside editor browser+ Just works

   Read on wp.org ↗
2. ★★★★★ lbdesign

   3mo ago

   It does one thing, but does it very well. I rely on it. Thank you for this plugin.

   Read on wp.org ↗
3. ★★★★★ renemwor

   5mo ago

   I really like this plugin. Set and forget! Limited options in the free version, but most of the time this is perfect.

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4. ★★★★★ Anonymous

   5mo ago

   Awesome plugin, directly goes to my default install list ! Thank you for the great work !

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5. ★★★★★ Jason L

   6mo ago

   used to work perfectly. I wish I could find older versions, as 1.2.2 no longer automatically converts images when uploaded. never should have updated. so annoying, and now looking for a new solution. update after dev response: I updated to 1.2.2 on other sites, and all have broken functionality. Will revisit this review after the next update. Update after the update: I had to roll back to 1.2.0, and you can find that here in a dropdown menu at the bottom of the content area: https://wordpress.org/plugins/cimo-image-optimizer/advanced/ This topic was modified 4 months, 2 weeks ago by Jason L. Reason: more installs are no longer functioning after 1.2.2 update This topic was modified 4 months, 2 weeks ago by Jason L.

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6. ★★★★★ alamea

   9mo ago

   I uploaded 5 images between 6 MB and 20 MB in less than 3 seconds. And the plugin works perfectly with Image Regenerate & Select Crop. All my custom image styles were cleanly applied and compressed to a minimal file size, and the whole thing is crystal clear. Thanks for your development. Fantastic work!

   Read on wp.org ↗
7. ★★★★★ rrvoigt

   11mo ago

   Fantastic plugin – great work!We’d love to give it 5+ stars, but a few key features are still missing: Image gallery conversion: It would be incredibly useful to have an option to convert images already in the media gallery (e.g., a “Convert with Cimo” button). Bulk conversion: Support for bulk image conversion, similar to what other plugins offer, would be a major plus. Compression details: When uploading via the media library, conversion is fast — great! However, we don’t see any compression details unless we upload via the post’s featured image section. It would be a valuable addition to display this info directly in the media gallery view. We also tested the plugin with our theme (Voxel) and noticed that images uploaded through various media widgets aren’t being converted. This might be due to missing hooks or compatibility gaps. Looking forward to future updates – this plugin has great potential! Best regards,Robert

   Read on wp.org ↗
8. ★★★★★ Dave Barr

   11mo ago

   Very happy to give this a well deserved Five Stars (★★★★★) as it’s as ingenious as it is simple. The final touch of perfection is that it works seamlessly with the Advanced Custom Fields (ACF) Image & Gallery field types. Big thanks to Benjamin Intal for this fine work! 🙌

   Read on wp.org ↗

Recent releases and news for this plugin

1. — Version 1.4.1 Fixed: PHP error notice because of invalid big_image_size_threshold usage 1.4.1
2. — Version 1.4.0 New: Smart Optimization (premium) – get even smaller image file sizes when uploading images #35 New: Video & audio can now be optimized in Bulk Optimization #37 New: Toggle optimization option – toggle Cimo’s optimizer o 1.4.0
3. — Version 1.3.1 Fixed: Optimization metadata may not be attached if uploading images with the same filename #40 Fixed: Added view all stats link Fixed: Added upgrade links 1.3.1
4. — Version 1.3.0 New: Bulk optimization without server processing (premium) New: Frontend file uploads can now be optimized (premium) New: Integrations to popular WordPress Form plugins (premium) New: Added stealth mode (premium) New: Ad 1.3.0
5. — Version 1.2.3 New: Added SVG Optimization (premium) New: Added HEIC image format support (premium) Fixed: Dropping files stopped working in some instances #32 1.2.3
6. — Version 1.2.2 Fixed: Uploading an image via Media > Add Media File doesn’t show stats #4 Fixed: Dragging multiple images in quick succession sometimes doesn’t optimize the image #3 Fixed: LQIP doesn’t work correctly when the image has 1.2.2

Automated install-time checks, tested on PHP 8.1.12 · WP 7.0

Translated into 4 languages, 1 at 90% or more

Growth timeline

Install-tier crossings we have observed, and how long each tier took to outgrow

1. 2026-08-28 9K+ → 10K+ up after 89 days in tier
2. 2026-05-31 7K+ → 8K+ up after 38 days in tier
3. 2026-04-23 6K+ → 7K+ up after 27 days in tier
4. 2026-03-27 5K+ → 6K+ up after 25 days in tier
5. 2026-03-02 4K+ → 5K+ up after 23 days in tier
6. 2026-02-07 3K+ → 4K+ up after 24 days in tier
7. 2026-01-14 2K+ → 3K+ up after 24 days in tier
8. 2025-12-21 1K+ → 2K+ up after 36 days in tier

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).

• EWWW Image Optimizer 1M+ installs · 4.8★ · 3 shared tags A
• Image Converter for WebP 1K+ installs · 4.2★ · 3 shared tags A
• Image Prioritizer 40K+ installs · 4.0★ · 2 shared tags B
• CompressX — AVIF & WebP Converter, Media Replacement 40K+ installs · 4.9★ · 2 shared tags A
• ShortPixel Adaptive Images – WebP, AVIF, CDN, Image Optimization 10K+ installs · 4.7★ · 2 shared tags A
• Enable SVG, WebP, and ICO Upload 10K+ installs · 4.3★ · 2 shared tags A

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Cimo – Free Instant Image Optimizer & WebP Converter: 10K+ active installs, 4.9★ (16 reviews). Plugin Pulse (WP Mayor), as of 2026-08-28. https://plugins.wpmayor.com/plugin/cimo-image-optimizer