Thumbor is a open-source smart on-demand image cropping, resizing,
and filters photo thumbnail service.
Fast, simple, scalable, Docker-ready HTTP microservice for high-level image processing.
Fast HTTP microservice written in Go for high-level image processing backed by bimg and libvips. imaginary can be used as private or public HTTP service for massive image processing with first-class support for Docker & Fly.io. It's almost dependency-free and only uses net/http native package without additional abstractions for better performance.
Automatic web site thumbnail generator.
Free web service allowing to display a thumbnail of a web site screenshot on web sites.