Fully in-browser container builds
A new web application allows users to build container images directly in their browser using client-side code. This research prototype enables users to select base images, run shell scripts, and export images as tar files. While the concept may seem gimmicky, it highlights the potential of custom container tooling and the benefits of developing personalized solutions.
- ▪The application allows users to build containers entirely in the browser.
- ▪Users can pick a base image and specify a shell script to run upon startup.
- ▪The source code for the builder is available for those interested in the details.
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Fully in-browser container builds 24 May, 2026 Containers are fun. The ecosystem is incredibly open, with the internals right there for anyone to explore. Once you wrap your head around the specifications, you unlock the power to build custom tools and may even discover unexpected use cases1. Speaking of “unexpected use cases”, today I have a demo to share: a web application that builds containers right in your browser, relying only on client-side code. Try it out Seeing is believing, so why don’t you head to the demo and build a container? You will be able to: Pick a base image Specify a shell script to run upon container startup Export the resulting image as a tar file, which you can then load into docker Important: this is a research prototype, don’t use it for anything serious.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Adolfo Ochagavía.
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