YAML Tools
YAML Schema Validator
Validate YAML data against a JSON Schema.
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What is YAML Schema?
A schema validator for YAML: define a JSON Schema in the right pane and validate any YAML document against it, seeing every failed path.
How it works
Both panes parse with js-yaml; the schema is compiled with AJV and the data is validated, listing each error's JSON path and message.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Realistic sample
Paste or type any realistic input — the tool computes the result locally and instantly.
Common mistakes
Expecting a server round-trip
Nothing is uploaded — every tool in this category runs entirely in your browser.