YAML Diff

How to use YAML Diff

1. Open YAML Diff — it runs entirely in your browser with no setup.
2. Paste or type your input into the text area, or upload a file where supported.
3. Set any options you need. The result appears in the output panel — there is no upload step and no waiting on a server.
4. Review the output instantly; large inputs are handled locally without lag.
5. Copy the result to your clipboard or download it. Your data never leaves the page.

Why use YAML Diff?

• 100% free with no limits, no sign-up and no watermarks.
• Private by design — your data are processed in your browser and never uploaded to a server.
• Fast and lightweight, with instant results even on a phone or a slow connection.
• Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
• Part of a full developer tools suite, so related yaml diff tasks are one click away.

What people use YAML Diff for

• Comparing two versions of a CI or Kubernetes manifest before applying one.
• Checking what a templating tool changed in a generated config.
• Reviewing environment configs against each other for drift.

YAML Diff: limits and things worth knowing

• Comparison is on the parsed structure, so indentation style, quoting style and key order do not register as differences — only the meaning does.
• Anchors and aliases are resolved before comparison, so a file that reuses a block and one that repeats it inline compare as equal.
• Comments are not part of the parsed document and therefore do not appear in the diff, even though they differ in the text.

Is it private and secure?

Your privacy is built in. YAML Diff runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.

Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.

You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.

Learn more

Working with JSON, XML and YAML: Format, Validate and Convert — Messy config or API response? Learn to pretty-print, validate and convert between JSON, XML, YAML and CSV in seconds.