Optimus – WordPress Image Optimizer
Download Optimus – WordPress Image Optimizer 1.6.3Free download · version 1.6.3
Description
At a glance
Looking for Optimus – WordPress Image Optimizer v1.6.3? It is available here as a free GPL download for WordPress — 30K+ active installs · 4.2/5 rating from 69 reviews · updated March 2, 2026 · requires WordPress 4.6+ & PHP 5.6+.
WordPress Image Optimizer
Optimus reduces the file size of uploaded media files automatically. Depending on the image and format, reductions in size of up to 70% are possible. Several kilobytes can be saved per image—these savings contribute positively to the performance of the blog website. What’s most impressive about the compression technology: the quality of the images is maintained.
There are three different versions of Optimus:
- Optimus (Free) as base version with limitations (e.g. max of 100kb)
- Optimus HQ (Premium) with expanded functionality for personal projects
- Optimus HQ PRO (Premium) as professional solution for customer websites
More details about the features and the pricing model on optimus.io
How does it work?
During the uploading process of images to the media library, the Optimus plugin simultaneously sends the images to the Optimus server, where the incoming material is processed and sent back in optimized form. Afterwards, the Optimus plugin saves the image version with a reduced file size in the media library.
The optimization of images – including thumbnails – is conducted in the background and outside of the view of the user. The image compression gains per file are displayed by Optimus within the media library in form of a percentage value, see screenshot.
Superfluous information that is saved by image processing programs and is not even necessary for displaying the image is extracted from image files. This way, the quality of the graphics remains intact while the image size can be reduced significantly. If you wish, Optimus keeps all author, EXIF and copyright information contained within the photos — the compressional gains will be correspondingly lower.
Optimus supports the conversion of images to the new WebP image format.
It is recommended to use the WordPress Cache Enabler plugin to integrate the converted WebP images.
Features
- Progressive JPEGs
- Reduction of file size during the upload
- Optimization of all preview images of a photo
- No adjustments to code necessary
- Optional: no removal of EXIF and IPTC metadata
- Optional: HTTPS connection for the image transfer (Optimus HQ)
- Optional: conversion to the WebP image format (Optimus HQ)
- Faster load times for blog pages
- Support for WooCommerce
- WordPress multisite-support
- Bulk optimization (optimize existing images)
Privacy
- After the image optimization and transfer process, the Optimus server immediately deletes all the temporarily stored files. No files are stored!
- The Optimus servers are located in Germany.
Tips
- Photos should always be saved as JPEGs rather than PNGs. The PNG format works well for illustrations, JPEG on the other hand is the right choice for photographs. Another reason: the size reduction always works more quickly for JPEGs.
- Your images have been optimized using Desktop tools such as ImageOptim (Mac) or PNGGauntlet (Win) before you upload them? Optimus has the significant benefit of also minimizing the thumbnails (=preview images) created by WordPress. After all, themes almost always integrate thumbnails rather than original images.
System Requirements
- PHP >=5.6
- WordPress >=4.6
- Allow outbound connections
Storage Utilization
- Backend: ~ 0,19 MB
- Frontend: ~ 0,01 MB
Website
Author
Frequently asked questions
What do I get when I download Optimus – WordPress Image Optimizer?
Optimus – WordPress Image Optimizer 1.6.3 is the latest version. It is a WordPress plugin you can download here free of charge under the GPL license, with the complete feature set included and no trial limitations. It holds a 4.2/5 rating from 69 user reviews.
Does Optimus – WordPress Image Optimizer cost anything?
No. Optimus – WordPress Image Optimizer 1.6.3 is 100% free — the full GPL version, not a trial or demo. There are no download limits, no accounts to create, and no upsells during the download.
How do I install Optimus – WordPress Image Optimizer 1.6.3?
Download the ZIP file from this page, then in your WordPress dashboard go to Plugins → Add New → Upload Plugin, choose the file, click Install Now, then Activate. The plugin works immediately after activation — no license key or extra setup is required for the core features.
What are the requirements for Optimus – WordPress Image Optimizer?
Optimus – WordPress Image Optimizer 1.6.3 requires WordPress 4.6 or higher and PHP 5.6 or higher. Most modern WordPress hosts already meet these versions. Running older versions may cause features to break, so update WordPress and PHP first if your site is behind.
When was Optimus – WordPress Image Optimizer last updated?
Version 1.6.3 was last updated on March 2, 2026. This page is refreshed automatically, so the download here always matches the newest version we have verified.
Is the Optimus – WordPress Image Optimizer download safe?
The file is sourced directly from the official WordPress.org repository — the same file the developer published. It is served unmodified, so what you install here is byte-identical to the official release.
Version: 1.6.3
Updated: October 1, 2026
Technical details
| Version | 1.6.3 |
|---|---|
| Last updated | March 2, 2026 |
| Active installs | 30,000+ |
| Rating | ★★★★☆ 4.2/5 (69 reviews) |
| Requires WordPress | 4.6 or higher |
| Requires PHP | 5.6 or higher |
| Author | KeyCDN |
| Tags | image-optimizer, images, optimize-image, webp, wordpress-image-optimizer |
Demo Optimus – WordPress Image Optimizer
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