Dev tools · September 10, 2014
Thumbor – open-source on-demand image cropping, resizing, and filters
Thumbor is a smart imaging service. It enables on-demand crop, resizing and flipping of images. It features a very smart detection of important points in the image for better cropping and resizing, using state-of-the-art face and feature detection algorithms (more on that in Detection Algorithms).
Thumbor – open-source on-demand image cropping, resizing, and filters launched on September 10, 2014 with 113 votes, #249 of 2,087 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 12 years on.
In plain words
Thumbor is an open-source imaging service that performs on-demand image cropping, resizing, and flipping. It automatically detects important features like faces in images using advanced detection algorithms to ensure cropped and resized images preserve the most important content. The tool is designed for developers who need to process and optimize images dynamically without manual intervention.
written from the facts on this page · September 2026
From the sources
Thumbor is a smart imaging service. It enables on-demand crop, resizing and flipping of images. It features a very smart detection of important points in the image for better cropping and resizing, using state-of-the-art face and feature detection algorithms (more on that in Detection Algorithms). With the most advanced face detection technology, Thumbor ensure you to have the best image crop possible. Everytime a face is detected, it will crop the image around it, making sure the most important parts of the picture are preserved. Thumbor allows users to store and load images from anywhere needed. It's really simple to implement a new loader or storage. It comes packaged with file, http,…from thumbor.org
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