Compare two Dockerfiles

Compare Dockerfiles with syntax highlighting for all instructions. Perfect for reviewing container image changes, comparing multi-stage builds, or auditing security changes. Supports FROM, RUN, COPY, ENV, and all Dockerfile directives.

Features

• Dockerfile syntax highlighting
• Instruction-level coloring
• Side-by-side and inline views
• Multi-stage build support
• Ignore whitespace option
• Share Dockerfile diff via URL

Frequently asked questions

Does it support multi-stage builds?

Yes. FROM ... AS aliases and COPY --from directives are highlighted.

Can I format Dockerfiles?

Auto-formatting is not available for Dockerfiles, but the diff clearly shows all changes.

Can I compare Docker Compose files?

Docker Compose files are YAML — use the YAML diff tool for those.

More diff tools