Optimus – WordPress Image Optimizer

Mô tả

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:

  1. Optimus (Free) as base version with limitations (e.g. max of 100kb)
  2. Optimus HQ (Premium) with expanded functionality for personal projects
  3. 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.

Chức năng

  • 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)
  • Optional: Disable automatic optimization during upload process
  • Optimized for WordPress Mobile Apps and Windows Live Writer
  • More advantageous PageSpeed, influencing the Ranking Factor
  • Faster load times for blog pages
  • Support for WooCommerce
  • WordPress multisite-support
  • Bulk optimization (optimize existing images)
  • Optimize images generated by WP Retina 2x (incl. conversion to WebP)

Quyền riêng tư

  • 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.


  • 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


Người viết


  • Display of the compression rate and how many images have been optimized (circle)
  • Before and after: Original image incl. thumbnails without compression (above) and below with Optimus compressed/optimized

Đánh giá

Saved so much time!

This one’s a gem!

This is one of the plugins that helped me learn how to optimize my websites. I use KeyCDN and found a large database of articles to help optimize my websites and realized that my images were a huge problem. Once installing this baby, it was smooth sailing from there.

Easy to install, and quick to shrink my images. It made a massive difference to my speed! And without much work at all! Truly made me happy to save so much time, especially when it came to my woocommerce site!

Definitely glad and worth the purchase!


Very few dependencies. I don’t have to worry about if uploaded images are ideal.

Amazing plugin

I can only say good things about this plugin. It’s done exactly what I needed it to and was very easy to use. My website loads faster now that my images have shrunk.

Optimierung bei API Anfragen

Guten Tag
Eigentlich sind wir sehr zufrieden mit dem Plugin, allerdings werde nur Bilder optimiert, die direkt über WordPress hochgeladen werden. Wir laden oft Bilder über die WordPress API hoch, jedoch greift das Plugin dort nicht. Könnten Sie die Optimierung auch für die API aktivieren, wie es auch beim WP Smush Plugin gemacht wurde?

Excellent tool

We wanted to speed up the delivery of our websites by decreasing the size of the images.

This tool helps deliver massively smaller images whilst keeping the quality high.

We even paid for the upgrade to keep it going automatically, definitely worth it.

Does what it says!

I wanted a no-nonsence image optimizer for my WordPress site. I already use and love KeyCDN so it was only natural to expand to their other offerings. Optimus is reasonably priced and does the job. Yes it took a long time to bulk optimize my 1000+ image library, but going forward, images are optimized in the background and I notice no drop in performance.

Đọc tất cả 63 đánh giá

Người đóng góp & Lập trình viên

“Optimus – WordPress Image Optimizer” là mã nguồn mở. Những người sau đã đóng góp vào plugin này.

Những người đóng góp

“Optimus – WordPress Image Optimizer” đã được dịch qua 2 ngôn ngữ. Cảm ơn những người tham gia dịch vì đóng góp của họ.

Dịch “Optimus – WordPress Image Optimizer” sang ngôn ngữ của bạn.

Muốn tham gia phát triển?

Duyệt code, check out SVN repository, hoặc theo dõi nhật ký phát triển qua RSS.

Nhật ký thay đổi


  • Formatting updates


  • Improved the handling of 204 errors
  • Removed language files


  • Improved the bulk optimizer


  • Added support for WP Retina 2x


  • Optimization to avoid conflicts with other plugins or themes


  • Fixed static function warning in PHP 5.6


  • Increased timeout value to 180 seconds


  • Allow to generate WebP images on already optimzed images (bulk optimizer)


  • Improves bulk optimization error handling


  • Added PNG in the free version and the manual optimization setting


  • Bug fixing and activation update


  • Bulk optimization feature



  • Neue Option: Keine Optimierung der Originalbilder
  • Korrektur: Löschung der WebP-Bilder im AJAX-Modus
  • Ausführlich auf Google+






  • Anpassung für WordPress 3.9: Sicherstellung der Bildoptimierung im WordPress-Editor


  • Überarbeitung der Kommunikation via cURL
  • Implementierung von HTTPS (Optimus HQ)
  • Zusätzliche Checks beim Versand und Empfang der Daten
  • Vereinfachung der Feedback-Ausgabe in grünen Kreisen
  • Kein Abgleich der Davor-Danach-Bildgrößen für 204-Header
  • Connection-Timeout auf 10 Sekunden
  • Tiefgehende Code-Revision



  • Optimus HQ: Umbau der Lizenzverifizierung wegen einem Bug im W3 Total Cache Plugin
  • Ausbau der Schnittstelle für binäre Datenübertragung



  • Christmas-Edition (Code- & Performance-Optimierungen)


  • Optimiert für WordPress 3.8


  • Optimus HQ: Eingabe eines neuen Lizenzschlüssels möglich
  • Selbstprüfung auf Erreichbarkeit der Upload-Bilder (Zugriffsschutz, etc.)
  • Performance-Optimierungen
  • Ausführlich auf Google+


  • Optimus HQ: Erhöhung des Limits für PNGs auf 200 KB
  • Optimus HQ: Konvertierung der Bilder ins WebP-Format




  • Interne Umstellung auf Mime-Type
  • Code-Optimierungen



  • Code-Freeze
  • Vervollständigung der FAQ
  • Filter für lokale Installationen


  • Support für PNGs


  • Beschränkung auf JPEGs (da fast keine PNG/GIF-Nutzung)
  • Menge der optimierten Thumbnails als Diagramm
  • Überarbeitung diverser Code-Fragmente


  • Verbesserte Fehlerausgabe an den Nutzer


  • Erweiterung der FAQ
  • Unterstützung für WordPress 3.5
  • Erhöhung des max. Limits auf 300 KB


  • Zusatzabfrage für (korrupte) Bild-URLs
  • Weiterer Screenshot


  • Diverse Code-Optimierungen
  • Reduzierung der Max-Größe


  • Unterstützung für PHP 5.2.4


  • Überarbeitung der GUI


  • Init release