Free Online Bulk Image Compressor Website with API: Compressio

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Compressio is a free online image compressor website with API. Here it takes multiple images from you and then compresses them instantly and you can download the optimized images together in a ZIP file. The best part is that you can control the output quality of each image that you upload here. Also, you can use this in your web or desktop apps as it offers a free image optimization API as well.

There are online image compressor websites out there which does the same thing, but here it is simple and really powerful. The optimized image doesn’t lose the color quality and it supports multiple image formats. Using this image compressor, you can compress any PNG, JPG, GIF or even an SVG image. It optimizes the images you upload in real-time and shows you before and after size comparison too.

Free Online Bulk Image Compressor Website with API: Compressio

Compression is an open-source image compressor as well. You can either self-host it or use the hosted version from here. The hosted version requires no sign up or anything else. You just go to the main homepage and then simply upload the files. You can upload images in any of the specified formats.

Compresso UI

Now, just hit the “Compress” button to start the conversion. After that, just wait for it to produce optimized images. After the optimized images have been produced, it will show you the before and after size comparison as well. Next, just download all the optimized images in a ZIP file using “Download All” button.

Compresso in action

You can use the API as well. The endpoint is /compress, and there you just have to submit a POST request. You can send up to 10 images and there is a JSON syntax for it. Also, there are some parameters that it supports and you have to supply them in the API request.

Compresso API

In this way, you can use this simple web app to compress image online using API. Just make the simple API calls or use the fluent web UI to compress images in bulk.

Final thoughts:

If you are looking for an open-source image compressor, then you are at the right place. Just use the web app, or you can simply use the API to compress images for free. The best part is that you can self-host it and so you will own your image data. Or, you can run it locally as well if you know how to setup Node.js apps.

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