qevroYAML Formatter
Paste or upload your YAML to beautify, format, and validate it. Indentation-sensitive — errors highlighted precisely.
About YAML Formatting
What is YAML?
YAML (YAML Ain't Markup Language) is a human-readable data serialization format used for configuration files, CI/CD pipelines (GitHub Actions, GitLab CI), Kubernetes manifests, Docker Compose files, and Ansible playbooks. Its indentation-based syntax makes it clean but error-prone.
How to Format YAML Online
Paste your YAML, click Format, and get consistently indented YAML with proper spacing. The tool is especially good at catching indentation errors — YAML's most common issue — and shows exact error positions with smart suggestions.
Common YAML Mistakes
The top YAML errors are incorrect indentation (mixing tabs and spaces), duplicate keys, missing colons, incorrect list formatting, and unquoted special characters. Our formatter catches all of these instantly.