Paste YAML and validate it against the YAML 1.2 specification: every syntax error with line and column, plus document count, key stats and the parsed result as JSON.
Paste a YAML file into the box above and it is parsed immediately by a real YAML 1.2 parser — the same js-yaml engine that powers countless Node.js build pipelines. If the document is valid you get the document count, the number of mapping keys, the node count and the deepest nesting level, plus the parsed result as JSON so you can see how YAML types such as booleans, numbers and timestamps were resolved. If something is wrong you get the parser's message together with the exact line and column and the offending line with a caret, so you can jump straight to the problem instead of hunting for a stray space. Multiple documents separated by --- are supported, anchors and aliases are resolved before the JSON is shown, and duplicate mapping keys are reported as errors because YAML requires unique keys. Everything runs locally in your browser: no file is uploaded, no account is needed, and the page works for Kubernetes manifests, GitHub Actions workflows, Docker Compose files or any other YAML you have.
Free online utility tools. No signup. No tracking.
Impressum · Sitemap · Some links contain affiliate advertising
Nutzung auf eigene Gefahr. Diese Tools werden kostenlos und ohne Gewährleistung für Richtigkeit, Vollständigkeit, Verfügbarkeit oder Eignung für einen bestimmten Zweck bereitgestellt; Ergebnisse sind keine professionelle Beratung. Die gesetzliche Haftung — insbesondere für Vorsatz, grobe Fahrlässigkeit sowie für Verletzungen von Leben, Körper oder Gesundheit — bleibt unberührt.
Use at your own risk. These tools are provided free of charge without any warranty of accuracy, completeness, availability or fitness for a particular purpose; results are not professional advice. Statutory liability — in particular for intent, gross negligence and injury to life, body or health — remains unaffected.
Uso bajo su propio riesgo. Estas herramientas se ofrecen de forma gratuita y sin garantía de exactitud, integridad, disponibilidad o idoneidad para un fin determinado; los resultados no constituyen asesoramiento profesional. La responsabilidad legal — en particular por dolo, negligencia grave y daños a la vida, el cuerpo o la salud — no se ve afectada.
Utilisation à vos propres risques. Ces outils sont fournis gratuitement, sans garantie d’exactitude, d’exhaustivité, de disponibilité ou d’adaptation à un usage particulier ; les résultats ne constituent pas un conseil professionnel. La responsabilité légale — notamment en cas de dol, de négligence grave et d’atteinte à la vie, au corps ou à la santé — reste inchangée.