How to use YAML Validator

What it does

Validate YAML syntax to prevent configuration errors in DevOps pipelines. It runs entirely in your browser — your input never leaves your device.

Options

Every setting this tool exposes, straight from the code that validates it.

Worked example

Run these settings on the tool page:

• yaml: name: Alice
• strictMode: true

You get:

✅ YAML is Valid

No syntax errors found. The structure is compliant with the YAML 1.2 specification and safe for use in your configuration pipelines.

Getting the result you want

Most of the control here is in the options above. If the output is not what you expected, the setting to check first is strictMode — those change the shape of the output rather than the input it accepts.

Troubleshooting

• Nothing happens / the output stays empty. yaml is required — the tool waits until you provide it.
• It is slow on very large input. Everything runs in your browser, so speed depends on your device. Very large inputs are best split up, or run through the API where the work happens on our servers.

Automating it

The same logic is available as a REST endpoint, so you can run it from a script, a CI job or your own app.

Bash
curl "https://api.toolsxpo.com/v1/yaml-validator" \
  -H "Authorization: Bearer $TOOLSXPO_KEY"

It costs 1 credit per successful call. See the full endpoint reference, or try it in the playground.

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