OnlineDiff checker

YAML Diff Checker

Compare YAML as parsed documents

Free YAML comparison tool online. Parse and compare YAML documents as data or text. No upload, completely private in browser.

YAML can be written with literal blocks, flow style, or folded scalars that carry identical meaning but look completely different as text. This YAML diff checker parses both sides into data structures, standardizes indentation, and compares the actual data values.

If you need to verify raw syntax indentation, toggle Compare as text to see line-by-line textual differences.

For JSON, use JSON Diff.

Frequently asked questions

Does YAML Diff parse YAML structure?

Yes, documents are parsed as data objects so differences in indentation style or quotes do not trigger false diffs.

Can I compare YAML purely as text?

Yes, switch to Compare as text or use the Text Diff tool.

Are multi-document YAML files supported?

Standard multi-document YAML streams separated by --- are supported.

Is my YAML data sent across the network?

No, comparison runs locally in your browser with zero network requests.