YAML Validator

Validate yaml online with schema support for Kubernetes, Docker Compose, GitHub Actions. Linter and formatter in one tool.

🔧 Validate yaml files against 11 official schemas with automatic detection. YAML Validator helps you catch errors before deployment with schema validation for kubernetes, docker compose and CI/CD pipelines. ✨ New in Version 1.1 - Schema validation for 11 platforms with auto-detection - GitHub code folding for browsing large config files - Open in Tab mode for full-screen editing - Dark mode support with system theme detection - Error line highlighting with click-to-jump navigation 📋 Supported Schemas Validate yaml online against official specifications: 1️⃣ Kubernetes v1.29 - k8s yaml validator for Deployment, Service, Pod, ConfigMap, Ingress, StatefulSet, DaemonSet, CronJob and 20+ resource types 2️⃣ Docker Compose v2.29 - docker compose validator with full spec support 3️⃣ GitHub Actions - github actions yaml validator for CI/CD workflow automation 4️⃣ GitLab CI - gitlab ci yaml validator for .gitlab-ci.yml pipelines 5️⃣ CircleCI - circleci yaml validator for config.yml build configurations 6️⃣ Azure Pipelines - azure pipeline yaml validator for devops workflows 7️⃣ Bitbucket Pipelines - bitbucket yaml validator for pipeline configs 8️⃣ Ansible - ansible yaml validator for playbook automation scripts 9️⃣ Helm Charts - helm yaml validator for Chart.yaml package management 🔟 OpenAPI 3.0 - openapi yaml validator for REST API specifications ⬛ Swagger 2.0 - swagger yaml validator for API specs 🎯 Smart Error Detection The extension automatically detects which schema applies to your content: ▸ Paste code and the matching schema is detected instantly ▸ Error line highlighting shows exact problem location ▸ Multi-document support with --- separators ▸ Schema mismatch suggestions with one-click fix 📂 GitHub Code Folding Browsing config files on GitHub? This extension adds a folding button: • Collapse and expand sections on any GitHub repository page • Navigate large configuration files with ease • Works with any .yaml or .yml file on GitHub • Toggle folding with a single click 💡 Key Features ➤ Syntax checker with instant feedback for your code ➤ Linter identifies structural and semantic issues early ➤ Formatter keeps code clean and readable ➤ Schema validation against official specifications ➤ Kubernetes yaml validator for k8s manifests and deployments ➤ Docker compose checker before running containers 🚀 Built for DevOps Engineers Designed for developers, sysadmins, and DevOps professionals: 1. Kubernetes validation - check k8s manifests before kubectl apply to prevent failures 2. Docker compose verification - catch config errors before docker compose up 3. CI/CD pipeline validation - GitHub Actions, GitLab CI, CircleCI, Azure Pipelines support 4. API spec checking - OpenAPI and Swagger format validation for REST APIs 5. Infrastructure as Code - Ansible playbook and Helm chart configuration support 📝 How to Use This Extension - Click the extension icon in your browser toolbar - Paste your code into the editor area - Schema is auto-detected or select manually from dropdown - Click Validate button to check syntax and schema compliance - Errors are highlighted with line numbers for quick navigation 🌐 Browser-Based Yaml Validator Online Validate yaml files directly in your browser with no external tools: ◆ Works completely offline after installation ◆ No data transmitted to external servers ◆ Your configuration code remains fully private ◆ Dark mode theme for comfortable editing sessions ◆ Open in Tab provides expanded workspace for larger files ◆ Persistent storage saves your work between sessions 🔍 Linting and Formatting Capabilities Comprehensive code quality features included: ▪ Detect syntax errors instantly as you type ▪ Check structure against json schema specifications ▪ Format code for better readability and consistency ▪ Verify configuration structure before deployment ▪ Multi-document parsing for complex configuration bundles ⚡ Cross-Platform Configuration Checking Supports configurations across multiple platforms and environments: • Kubernetes yaml validation for cloud-native apps and microservices • Docker compose yaml checker for container orchestration • GitHub actions validator for continuous integration pipelines • Gitlab ci linter for automated build and deploy processes • Circleci config checking for cloud-based build automation • Ansible playbook validation for infrastructure automation ❓ Frequently Asked Questions Q: Does this extension work offline? A: Yes, after installation all validation happens locally in your browser. Q: Is my code sent to any server? A: No, your configuration remains completely private on your device. Q: What Kubernetes version is supported? A: Currently supports Kubernetes v1.29 with 23 resource types. ✅ Download YAML Validator for fast, reliable configuration file checking. Validate yaml online with kubernetes yaml validator, docker compose checker, and 11 schema types.