This package is abandoned and no longer maintained. No replacement package was suggested.

Kirby 3 Thumb Driver using Imageoptim

2.0.2 2021-09-28 14:56 UTC


The used php lib will most likely not recieve an update for php 8 so I decieded to drop support for this plugin.

Kirby 3 Thumb Imageoptim

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Kirby 3 CMS Thumb Component to optimize images using ImageOptim Api.

Commercial Usage

Support open source!

This plugin is free but if you use it in a commercial project please consider to sponsor me or make a donation.
If my work helped you to make some cash it seems fair to me that I might get a little reward as well, right?

Be kind. Share a little. Thanks.

‐ Bruno
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  • unzip as folder site/plugins/kirby3-thumb-imageoptim or
  • git submodule add site/plugins/kirby3-thumb-imageoptim or
  • composer require bnomei/kirby3-thumb-imageoptim



In your site/config.php options set the ImageOptim API key.

'options' => [
    'bnomei.thumbimageoptim.apikey' => 'YOUR_API_KEY_HERE',
    // ... other options

TIP: You can also set a callback if you use the dotenv Plugin.
'bnomei.thumbimageoptim.apikey' => function() { return env('IMAGEOPTIM_APIKEY'); },


Generate thumbs as usual using resize() File Method or the srcset() function.

$img = $page->image('ukulele.jpg');
echo $img->resize(234)->html();

If you want your image to be optimized but retain their original size use: $img->thumbimageoptim(). You can providing a width or height but its optional.

$img = $page->image('ukulele.jpg');
echo $img->thumbimageoptim()->html();
// matches
echo $img->resize($img->width())->html();

TIP: if you use $img->resize() without a param you will not generate a thumb and it will not be optimized.

This plugin will work with the Srcset Plugin but be aware that depending on your srcset config a lot of files might be requested to be optimized. The requests are not send aync but one after another waiting for the response. The plugin will discard unfinished requests on next retry.


bnomei.thumbimageoptim. Default Description
apikey callback or null Your imageoptim apikey as string.
enabled true set to false to disable optimization with this plugin
forceupload false set to true when images are not public available (like a website with htpasswd).
timelimit null or int if int value is set set_time_limit will be called for each request
apirequest array default io_quality and io_dpr values

Localhost and forceupload

Content is always uploaded on localhost. The allow_url_fopen PHP setting must be enabled for the API to do uploading. Check with ini_get('allow_url_fopen'). Please be aware of the potential security risks caused by allow_url_fopen!


This plugin is provided "as is" with no guarantee. Use it at your own risk and always test it yourself before using it in a production environment. If you find any issues, please create a new issue.



It is discouraged to use this plugin in any project that promotes racism, sexism, homophobia, animal abuse, violence or any other form of hate speech.