YAML Validator
Validate YAML strings and convert to JSON.
POST
1 credit
/v1/yaml-validate
curl -X POST "https://devtools.toolkitapi.io/v1/yaml-validate" \
-H "Content-Type: application/json" \
-d '{"data": "name: Alice\nage: 30\ntags:\n - dev\n - ops"}'
import httpx
resp = httpx.post(
"https://devtools.toolkitapi.io/v1/yaml-validate",
json={"data": "name: Alice\nage: 30\ntags:\n - dev\n - ops"},
)
print(resp.json())const resp = await fetch("https://devtools.toolkitapi.io/v1/yaml-validate", {
method: "POST",
headers: {
"Content-Type": "application/json",
},
body: JSON.stringify({"data": "name: Alice\nage: 30\ntags:\n - dev\n - ops"}),
});
const data = await resp.json();
console.log(data);# See curl example
Response
200 OK
{
"valid": true,
"as_json": {
"name": "Alice",
"age": 30,
"tags": ["dev", "ops"]
}
}Try It Live
Live Demo
Response
Description
Validate YAML strings and convert to JSON.
How to Use
1
1. Send a POST request with a `data` field containing the raw YAML string.
2
2. If `valid` is `true`, the `as_json` field contains the parsed YAML as a JSON-compatible object.
3
3. If `valid` is `false`, the `error` field describes the syntax problem.
About This Tool
YAML Validator checks whether a given string is valid YAML. When valid, it returns the parsed data as a JSON object — handy for YAML-to-JSON conversion. When invalid, it returns the parse error.
Why Use This Tool
- Config validation — Verify Kubernetes manifests, CI/CD configs, or Helm values before deploying
- YAML to JSON conversion — Convert YAML data to JSON for downstream processing
- Syntax checking — Catch indentation and quoting errors before they break pipelines
Frequently Asked Questions
Does it support multi-document YAML?
The validator parses the first YAML document in the stream using `safe_load`. Multi-document streams (separated by `---`) will only return the first document.
Can I use this for YAML-to-JSON conversion?
Yes. When validation succeeds, the `as_json` field is a fully JSON-compatible representation of your YAML data.
Start using YAML Validator now
Get your free API key and make your first request in under a minute.