by SlashImage 5 (1 reviews)

SlashImage – Image Optimizer: Compress Images, Convert WebP & AVIF

Name: SlashImage – Image Optimizer: Compress Images, Convert WebP & AVIF
Rating: 5.0 (1 reviews)
Author: SlashImage

Automatically compress every image and serve WebP and AVIF to every visitor. Small files, the quality you choose, zero manual work.

SlashImage ranks #16,881 among WordPress.org plugins with 90+ active installations, a 5/5 rating from 1 reviews, and was last updated Sep 28, 2026. Data from WordPress.org, refreshed twice daily — see methodology.

Compatible with WP 7.1.4

v1.2.2 Current Version v1.2.2

Updated 1 month ago Last Update on 28 Sep, 2026

Refreshed 1 week ago Last Refreshed on

Top 25% by installs

View on WordPress.org

Rank

#16,881

— No change

Active Installs

90+

-2.2%

KW Avg Position

75.6

— No change

Downloads

1.2K

+1 today

Support Resolved

— No change

Rating

100%

Review 5 out of 5

5 (1 reviews)

Next Milestone 100

Total Progress 20%

90+ 100+

4,401

Ranks to Climb

Growth Needed

8,000,000

Active Installs

Pro

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Rank Changes

Current #16,881

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Active Installs Growth

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Active Installs 0,000,000+

Growth +0.0%

Peak 0,000,000

Downloads Growth

Downloads

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Peak

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Reviews & Ratings

5.0

1 reviews

Overall 100%

1 (100%)

0 (0%)

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Plugin Details

Version: 1.2.2
Last Updated: Sep 28, 2026
Requires WP: 6.5+
Tested Up To: 7.1.4
PHP Version: 7.4 or higher
Author: SlashImage

Support & Rating

Rating: ★ ★ ★ ★ ★ 5
Reviews: 1
Support Threads: 0
Resolved: 0%

Keywords

AVIF compress images image optimization optimize images webp

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Frequently Asked Questions

Common questions about SlashImage – Image Optimizer: Compress Images, Convert WebP & AVIF

The free plan optimizes 200 images each month at no cost. The plugin itself stays fully functional regardless of how many images you have optimized.

When you upload an image, SlashImage sends it to our optimization servers, optimizes it, generates WebP and AVIF versions, and saves the results back to your site. All the heavy lifting happens on our servers, so your hosting is never slowed down.

Images are sent to the SlashImage API for compression, the optimized version is returned and saved to your server, and the original is deleted from our servers immediately after processing.

No. Images are queued and compressed in the background, so your upload returns immediately. The optimized version replaces the original within minutes.

Yes. Go to Media to Bulk Optimize and click Start. SlashImage processes your existing Media Library in the background.

Yes. If ShortPixel or Imagify has already optimized your library, open the Tools tab on the SlashImage settings screen. It imports their optimization data and serves the WebP and AVIF files they already created, so nothing has to be optimized a second time. Keep the other plugin active until the import finishes — the Tools tab only lists optimizers that are still active. You scan first and see exactly what will be imported before anything changes, and the other plugin's files and settings are never modified. Migration runs on single-site installs only for now.

Yes. SlashImage backs up every original before making changes. Restore any image from the Media Library or the attachment edit screen.

Yes. Your optimized images are saved directly on your site and stay exactly as they are. The WebP and AVIF versions remain on disk too. Deactivating the plugin simply stops new images from being optimized.

Yes. Pick from three modes in the settings: Lossy for the smallest files, Glossy for high-fidelity photography, and Lossless for pixel-perfect originals. You can change the mode at any time, and re-optimize individual images in a different mode from the Media Library.

No. Your filenames, ALT text, captions, and all other media details are left completely untouched. Only the image file itself is optimized.

SlashImage – Image Optimizer: Compress Images, Convert WebP & AVIF

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