What YAML version is supported?

The validator uses js-yaml which supports YAML 1.2. It handles all standard YAML features including anchors (&), aliases (*), and merge keys (<<).

Does it fix YAML errors automatically?

No. YAML errors require human judgement to fix correctly. The tool reports the error location and type so you can make the right correction.

YAML Validator

Validates YAML syntax and reports errors with line and column numbers. On success, shows the parsed structure and optionally re-formats the YAML with consistent indentation. Uses the js-yaml parser for strict YAML 1.2 compliance. Useful for validating Kubernetes configs, GitHub Actions, Docker Compose, and Ansible playbooks.

YAML

Paste your YAML and instantly see whether it's valid — errors are shown with precise locations.

Frequently Asked Questions

Related Tools

Diff Checker

Compare two blocks of text and highlight the differences.

Regex Tester

Test regular expressions against sample text with live match highlighting.

UUID Generator

Generate one or many UUIDs (v4) instantly.

Character Counter

Count characters against Twitter, LinkedIn, and SMS limits.

New

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text.

New

JSON Escape / Unescape

Escape special characters for JSON strings, or unescape JSON string values.