How to use the YAML Validator
- Paste your YAML into the editor, or open a file.
- Validation runs automatically as you type.
- Fix any reported error using the line and column shown.
About YAML
YAML is an indentation-based format used for Kubernetes manifests, Docker Compose, GitHub Actions, OpenAPI specs and countless config files. It is a superset of JSON that favours readability.
Private by design
Developer data is often sensitive: API responses, tokens, customer records, internal configs. This YAML Validator processes everything locally in your browser tab. There is no server round-trip, no logging and no storage of your input.
Frequently asked questions
Is this YAML Validator free?
Yes. This YAML Validator is completely free to use with no sign-up, no limits and no ads inside the tool.
Is my data uploaded to a server?
No. The YAML Validator runs entirely in your browser using JavaScript. Nothing you paste is sent to DevT Pro or any other server.
What does the YAML Validator check?
It parses your input with a standards-compliant YAML parser and reports the first syntax error with its message.
Can I use the YAML Validator offline?
Yes. YAML Validator is also built into DevT Pro, a native app for Mac, Windows, iPad and Linux with 120+ developer tools that work fully offline. It is a $5.99 one-time purchase with no subscription.
