Illustration of a Docker image reference breaking down into registry, repository, tag, and digest parts

Docker Tag Validator

Type an image reference to validate it against Docker's own reference grammar and see its registry, repository, tag, and digest. Runs entirely in your browser.

💻 Show API usage examples (cURL)

curl -sS -X POST https://devops.majbase.com/docker-tag-validator/api -H "Content-Type: application/json" -d '{"reference":"nginx:1.25.3-alpine"}'

Returns {"valid", "registry", "repository", "tag", "digest"}, or {"valid": false, "error": "..."}.