About The YAML Diff

YAML Diff compares two YAML text inputs and reports line-level additions, removals, and edits. It is useful for reviewing configuration changes before a deploy, pull request, or environment update.

The comparison runs locally in your browser and does not upload your YAML. The output is a text diff, so formatting changes are reported exactly as they appear in the two inputs.

How to Compare YAML Online

1. Paste the baseline YAML into YAML A.
2. Paste the changed YAML into YAML B.
3. Click Compare YAML.
4. Review removed lines, added lines, and changed line numbers in the result.
5. Use Copy Output when you need to move the diff into notes or a review thread.

Choosing Options Correctly

Input order:
Put the older or expected version in YAML A and the newer version in YAML B. Reversing them reverses which lines appear as removed or added.

Common Use Cases

• Reviewing application config changes before release.
• Checking CI, Docker Compose, Kubernetes, or pipeline YAML edits.
• Comparing two environment-specific settings files.
• Creating a quick plain-text diff for documentation or code review.

Quick FAQ

Does this validate YAML syntax?
It needs valid YAML to do structured comparison. Syntax errors can prevent a useful diff.

Can I paste private configuration here?
Avoid production configs with credentials, tokens, private URLs, or customer details.

Why do indentation-only changes appear in the result?
YAML indentation affects structure, and even harmless formatting can show up in text-oriented views.

Are comments preserved in comparison?
Structured YAML parsers may ignore or drop comments, so comment-only changes may not appear as data changes.