Joomla! Extensions Directory



Core Enhancements, Performance

The Prizm Image plugin helps to achieve web site performance by optimizing images while maintaining resolution and visual quality. Compare our output to the popular Smush.It website and you will see significant reduction in image sizes. Also, Prizm Image has no size limit on the files that can submitted for reduction.

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This plugin integrates with the Prizm Image API to optimize images for a Joomla website. It provides customizable options to do the following:

Optimize JPEG compression
Strip metadata from all JPEGs (except for copyrights)
Convert between Progressive JPEGs and Sequential JPEGs
Optimize PNGs
Optimze GIFs

User Registration
You will need to register for a Prizm Image account in order to obtain a free License Key to use the plugin. This is a free account.

How does it work?
There are three ways you can optimize images using your customized settings:

Automatically on upload: Automatically optimize every image you add to the Media Manager's Library (unless you disable the Use Prizm Image on upload option in Components > Prizm Image > Options).
Individually: Run existing images through the Prizm Image Component. In the Prizm Image Component, select the files and/or folders to reduce and click the Reduce Selected button for any image you'd like to optimize.
Entire Media Library: Optimize all the images in the Media Manager's Library. In the Prizm Image Component, click the Reduce Media Library button. Once run, the Reduce Media Library button becomes disabled. If you wish to change a setting for the entire media library, the Reduce Media Library button can be re-enabled in the options, Components > Prizm Image > Options.
Configuration Settings
Configure the options in the Components > Prizm Image > Options as follows:

Prizm Image License Key
Enter the License Key you have obtained by registering Prizm Image
Select quality of reduced images
Lower Quality - Smaller File Size
Balanced Quality and File Size (default)
Higher Quality - Larger File Size
Remove JPEG metadata
Select 'Yes' to remove JPEG metadata (except for copyright data) (default)
Select 'No' to preserve all metadata
Select JPEG Mode
Convert Sequential JPEGs to Progressive JPEGs
Convert Progressive JPEGs to Sequential JPEGs
Do not change the JPEG mode (default)
Use Prizm Image on upload?
Automatically process on upload (default)
Do not process on upload
Timeout threshold in seconds(5 to 300)
Specify the number of seconds to wait (120 seconds is the default setting)
Enable debug processing
Select to display additional troubleshooting information
Deselect to not display additional troubleshooting information (default)

Prizm Image does not accept filenames that contain the character '+'. If a file with a filename containing '+' is attempted to be reduced, then an error will be returned.

-- Change History --

  • 1.0.0
  • Initial edition

  • 1.0.1

  • Change to SQL query in Prizm Image Component to return images that have been reduced.
  • Encode filename passed to the Prizm Image Service in the Prizm Image plugin.
  • Fixed strict standard errors for variables being accessed by reference.
  • Fixed file paths in the database to be relative under Windows and to follow same format as Unix based servers.

Good but not enough

Posted on 18 September 2015

Images are well optimized but whatever setup we used we can't satisfy to Google optimisation demands.

Ease of use

Easy to install, setup and use.


Not use. No need.

I used this to: Compress website images ti gain Google more score points.


Function good, but compression algorithm not good enough for page speed insights - and i think this is the most reason for compressed images

Ease of use

Easy to use.


Support Page not available - 19.05.2015 - 5:42 PM GMT+1

I used this to: I want to compress my images because of pagespeed insights - but the results where not good enough. i tried all 3 quality options. But Google said at least there a 3 % you can compress.

This plug-in worked straight out of the box and gave amazing results using the default settings. I just don't have the time to resize images individually and this process made optimisations to my complete media library in minutes, without loss of appreciable quality.

Web page now loads up in a blink of the eye after reducing some image file sizes by 94% and has bumped my google site speed tests up 15 points

PrizmCloud Document Viewer

PrizmCloud Document Viewer

Free | Social Display | Accusoft
1 review
Prizm Viewer is a document viewer that enables you to display hundreds of different kinds of files on your website without worrying about whether your visitors have the software to view them and without installing any additional hardware or software. The document files stay on your server, so you can update, edit and change them anytime. Prizm Viewer supports more than 300 file types, including DOC, PDF, PPT, XLS and CAD. This package includes both an editor button and a content plugin. Also, a new option to display your document via a slideshow.
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Prizm Image

Last updated:
Mar 25 2015
Date added:
Nov 19 2014
GPLv2 or later
Free download
Uses updater:
Download DemoNot available SupportNot available DocumentationNot available
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