Containers & Docker
OCI Image Spec Reference
Search OCI Image Specification concepts — image manifests, layer digests, image config, multi-platform image indexes, and standard annotations.
Calculations run locally in your browserTool
About this tool
OCI Image Spec Reference
The OCI Image Spec Reference covers image manifests, layer digests, image config fields, multi-platform image indexes, and standard org.opencontainers.image.* annotation labels.
• Look up OCI image manifest structure before building a custom registry client
• Understand layer digest format before implementing image caching
• Reference multi-platform image index format before publishing a multi-arch image
• Find standard OCI annotation keys before labeling CI-built images
Next step
Container Base Image Comparison — Compare container base images by size, compatibility, and attack surface for your runtime.
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FAQ
What does this tool tell you?
The OCI Image Spec Reference covers image manifests, layer digests, image config fields, multi-platform image indexes, and standard org.opencontainers.image.* annotation labels.
What affects the result most?
OCI Image Spec: mediaType, config, layers — standardized format across registries. Image manifest: JSON listing layers by digest and config — what docker pull fetches first. Image config: Cmd, Entrypoint, Env, ExposedPorts, WorkingDir — runtime configuration.
How should I use the result?
Use this tool to orient quickly to the concepts, field names, or values you are about to look up in a full specification or vendor documentation. It summarizes the common cases; the authoritative source remains whichever standard or vendor doc defines the values themselves.
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