by nixtool 5 (1 reviews)

Nix Image Optimizer

Name: Nix Image Optimizer
Rating: 5.0 (1 reviews)
Author: nixtool

Convert images to WebP with bulk compression, media log, watermarking, image SEO, featured image generation, and unused media cleanup.

Nix Image Optimizer ranks #30,201 among WordPress.org plugins with 10+ active installations, is #2,933 of 6,372 in the Media category, a 5/5 rating from 1 reviews, and was last updated May 30, 2026. Data from WordPress.org, refreshed twice daily — see methodology.

Tested up to WP 7 (Current: 7.1.2)

v2.1.11 Current Version v2.1.11

Updated 3 months ago Last Update on 30 May, 2026

Refreshed 12 hours ago Last Refreshed on

#2,933 of 6,372 in Media Top 50% by installs

View on WordPress.org

Rank

#30,201

— No change

Active Installs

10+

-23.1%

KW Avg Position

143

32 better

Downloads

329

+2 today

Support Resolved

— No change

Rating

100%

Review 5 out of 5

5 (1 reviews)

Next Milestone 20

Total Progress 50%

10+ 20+

16,939

Ranks to Climb

Growth Needed

8,000,000

Active Installs

Pro

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Rank Changes

Current #30,201

Change

Best #

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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

Growth

Peak

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Reviews & Ratings

5.0

1 reviews

Overall 100%

1 (100%)

0 (0%)

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Plugin Details

Version: 2.1.11
Last Updated: May 30, 2026
Requires WP: 5.8+
Tested Up To: 7
PHP Version: 7.4 or higher
Author: nixtool

Support & Rating

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

Keywords

compression featured image image seo images webp

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Frequently Asked Questions

Common questions about Nix Image Optimizer

New uploads in JPG, JPEG, PNG, and AVIF format can be converted to WebP. Existing supported images can also be processed through Bulk Compress.

No. Existing images are only processed when you run the bulk compression or watermark rebuild tools.

Yes. You can upload a watermark logo, choose the position, opacity, size, and margin, and optionally exclude specific images.

Yes. The plugin includes an unused media scanner and cleaner to help identify media items that are not referenced in content or common metadata.

It can fill missing image ALT text and attachment descriptions when posts are saved. Basic mode uses the post title and meta description or excerpt. Advanced mode uses nearby headings and section text for content images.

No. Future post saves fill empty fields by default. Backfill tools separate missing, generated Basic, generated Advanced, and custom image metadata so you can safely update only the intended group.

The Featured Image Generator saves JPEG files to keep smooth gradient output predictable between 20 KB and 60 KB.