Modular thumbnail generation, for CodeIgniter 4

v1.2.2 2020-10-01 19:30 UTC


Modular thumbnail generation, for CodeIgniter 4

Quick Start

  1. Install with Composer: > composer require tatter/thumbnails
  2. Load the service: $thumbnails = service('thumbnails');
  3. Create your first thumbnail: $thumbnails->create('bigfile.jpg', 'thumbnail.jpg');


Thumbnails uses CodeIgniter4's native Image class for fast and efficient processing. It also checks for modular support files so it can grow to cover anything you could possibly want to thumbnail: videos, 3D assets, text documents.


Install easily via Composer to take advantage of CodeIgniter 4's autoloading capabilities and always be up-to-date:

  • > composer require tatter/thumbnails

Or, install manually by downloading the source files and adding the directory to app/Config/Autoload.php.

Configuration (optional)

The library's default behavior can be altered by extending its config file. Copy examples/Thumbnails.php to app/Config/ and follow the instructions in the comments. If no config file is found in app/Config the library will use its own.


  • Load the service: $thumbnails = service('thumbnails');
  • Use the config file to define parameters, or change them on-the-fly:
  • Use the create() method to write the thumbnail out to a convenient location: $thumbnails->create('bigfile.jpg', 'thumbnail.png');


The library looks across all namespaces for a Thumbnails/ directory and loads any supported classes it find. Each class defines the extensions it supports as well as its own create() method to generate the image. Add additional extension support from other modules, or write your own. Files will be processed by matching the extension to each handler's list of supported extension. You may also specify a specific handler to use with the setHandler() method.


This library will periodically update with new supported extensions, but please feel free to submit Pull Requests with additional handlers (or bugfixes).