YAML Formatter and Validator

1. Paste or type YAML into the input field.
2. Choose 2-space or 4-space indentation, and optionally sort mapping keys alphabetically.
3. Select “Format YAML” to see the formatted result, or a clear error if the YAML is invalid.
4. Browse the result as a collapsible tree (expand or collapse any key), or switch to “Text” for the raw formatted output and search it with “Find”.
5. Copy the result to your clipboard, or download it as a .yaml file.

Select “Use example” above to load a sample document, or try input like:

service: payments-api
replicas: 3
env: production

• Input is sent to our API only to be parsed and re-formatted; it is never persisted or logged.
• Requests are not included in analytics or error reporting.
• Formatting never executes your YAML as code, and no anchors/aliases are resolved into arbitrary references.
• Request bodies are limited in size to keep the service responsive for everyone.

• Only a single YAML document is supported — multi-document streams separated by --- are rejected with a clear error.
• Comments in the original input are not preserved in the formatted output.
• Very large payloads may be rejected to protect the service; format large files locally instead.

Need to work with JSON instead? Try the JSON Formatter and Validator. Need to encode or decode Base64? Try the Base64 Encoder and Decoder. Parse error you can’t spot? See common YAML indentation errors. More DevOps utilities are coming soon.

• Common YAML indentation errorsThe handful of indentation mistakes that account for most YAML parse failures, and how to spot them fast.
• JSON vs YAML for configurationWhen to reach for JSON, when YAML actually earns its complexity, and how to convert between them.