YAML Validator
Use this free online YAML Validator to validate YAML syntax and find indentation errors. It works instantly in your browser, and your data never leaves your device.
About the YAML Validator
YAML is sensitive to indentation and tabs. The validator parses your file and tells you exactly where a problem is, which saves time with Kubernetes manifests and CI configs.
Also known as: yaml lint, yaml checker.
How to use the YAML Validator
- Paste your input into the box above, upload a file, or click Sample to try an example.
- Pick any options you need. The YAML Validator processes your input instantly as you type.
- Click Copy to copy the output or Download to save it as a file.
Features
- Free with no signup and no daily limits
- Private: runs entirely in your browser
- Works on mobile, tablet and desktop
- Upload files and download results
- Live results as you type, with clear error messages
- Clean, fast interface with no popups
Frequently asked questions
Is the YAML Validator free to use?
Yes. The YAML Validator is completely free with no signup, no limits on normal use and no watermark.
Is my data safe?
Yes. Everything is processed by JavaScript inside your own browser. Your text is never uploaded to our server or stored anywhere.
Can I choose the indentation?
Yes. Pick 2 spaces, 4 spaces or tabs from the options, and the output updates instantly.
Does it work offline and on mobile?
Once the page has loaded, the tool runs in your browser and works on phones, tablets and desktops.
What else is this tool called?
People also search for it as yaml lint, yaml checker. It is the same free tool.