Docker Image Parser

Code

Parse docker image references into registry, namespace, tag, and digest components

Paste a full image reference or a shorthand like `nginx:latest` or just `redis` and it splits out the registry, namespace, repository, tag, and digest, applying the same default-resolution rules Docker itself uses (unqualified names resolve to `docker.io/library/<name>:latest`). It correctly disambiguates a registry with a port from a name-and-tag pair, validates tag format, and can build the equivalent `docker pull` or `docker run` command from the parsed parts. This is purely local string parsing though: it never contacts a registry, so it can tell you how a reference resolves but can't confirm the image or tag actually exists, which is worth remembering when debugging why a CI pipeline pulled the wrong thing before you assume the reference itself was wrong.

dockerimageregistrycontainerparse

How to use Docker Image Parser

1.Paste a full image reference like `registry.example.com/team/app:1.2.3@sha256:abcd...` to split it into registry, namespace, repository, tag, and digest.
2.Paste a shorthand reference like `nginx:latest` or `redis` to see how Docker's default registry and namespace rules fill in the missing parts.
3.Use it to debug a CI pipeline that's pulling the wrong registry or tag by checking exactly how a reference string will be parsed before you run `docker pull`.

Frequently asked questions

Does this pull or validate the image against a real registry?

No, this only parses the reference string itself — it doesn't contact any registry to check if the image or tag actually exists.

Is my input sent anywhere?

No, parsing happens entirely in your browser using string parsing logic, not a network call.

What happens if I paste a reference with no tag?

It's parsed the same way Docker treats it — defaulting to the `latest` tag — so the tool shows you what Docker would actually pull.

Does it support digests without a tag, like `image@sha256:...`?

Yes, digest-only references are supported and parsed separately from the tag field, since an image can be pinned by digest with or without a tag present.

Use via API, SDK, or MCP

cURL# Free: 1,000 req/day · Pro: 10,000 req/day
curl -X POST https://api.utilix.tech/v1/tools/docker-tag \
  -H "Authorization: Bearer utx_live_..." \
  -H "Content-Type: application/json" \
  -d '{"input": "node:20-alpine"}'

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Docker Image Parser

How to use Docker Image Parser

Frequently asked questions

Use via API, SDK, or MCP

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