
Visually lossless image compression for PNG, JPEG and WebP.
Compresso API is a free Photography API that requires apiKey authentication, is served over HTTPS and does not support CORS, so it should be called from a server.
Free image compression API for PNG, JPEG and WebP: one HTTP request, 100 free compressions a day, curl, Node.js, Python and PHP examples.
Details from compresso.space.

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Image manipulation and processing
The Compresso API is provided by Compresso (compresso.space). Free image compression API for PNG, JPEG and WebP: one HTTP request, 100 free compressions a day, curl, Node.js, Python and PHP examples.
Yes. The Compresso API is listed in the Photography category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The Compresso API uses apiKey authentication, so you need to register for credentials before making requests.
Not directly. The Compresso API does not allow CORS, so call it from a server, serverless function or proxy instead of front-end JavaScript.
Yes. The Compresso API is served over HTTPS, so it's safe to use in production.