YAML Validator

🔧 Validate YAML files against 11 official schemas with automatic detection. This browser-based validator helps you catch configuration errors before deployment with schema validation supporting Kubernetes, Docker Compose, and CI/CD pipelines. ✨ New — YAML Lint Warnings - Catches values that silently change type — the "Norway problem" where no, yes, on, and off are read as booleans - Flags leading-zero numbers, time-like values, and version strings that parse as the wrong type - Non-blocking warnings sit alongside the result, each linking to a guide that explains the trap with examples - Companion website at yamlvalidator.dev — validate and lint online without installing anything 📋 Supported Schemas Validate configurations online against official specifications: 1️⃣ Kubernetes v1.29 - k8s manifest validator supporting Deployment, Service, Pod, ConfigMap, Ingress, StatefulSet, DaemonSet, CronJob and 50+ resource types 2️⃣ Docker Compose v2.29 - container orchestration checker with full spec support 3️⃣ GitHub Actions - workflow validator enabling CI/CD automation 4️⃣ GitLab CI - pipeline checker supporting .gitlab-ci.yml configurations 5️⃣ CircleCI - build configuration validator supporting config.yml files 6️⃣ Azure Pipelines - devops workflow checker with full schema support 7️⃣ Bitbucket Pipelines - pipeline configuration validator 8️⃣ Ansible - playbook automation script checker 9️⃣ Helm Charts - Chart.yaml package management validator 🔟 OpenAPI 3.0 - REST API specification checker ⬛ Swagger 2.0 - API spec validator 🎯 Smart Error Detection The validator automatically detects which schema applies to your content: ▸ Paste code and the matching schema is detected instantly ▸ Error line highlighting shows exact problem location ▸ Lint warnings flag type-coercion traps that pass validation but break other tools ▸ Multi-document support with --- separators ▸ Schema mismatch suggestions with one-click fix 📂 File Operations and Sharing Work with configuration files directly in your browser: • Open .yaml and .yml files from your computer for validation • Save and download edited files when done • Share snippets via compressed URL with your team • Drag and drop files onto the editor • Full-screen tab mode for editing larger configurations 📂 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 providing instant feedback on your code ➤ Linter identifies structural and semantic issues early ➤ Formatter keeps code clean and readable ➤ Schema validation against official specifications ➤ Kubernetes manifest checker supporting k8s deployments ➤ Docker compose validator before running containers ➤ Open, edit, and save files from disk ➤ Share via URL with your team 🚀 Built for DevOps Engineers Designed to help developers, sysadmins, and DevOps professionals: 1. Kubernetes validation - check k8s manifests before kubectl apply 2. Docker compose verification - catch config errors before docker compose up 3. CI/CD pipeline validation - GitHub Actions, GitLab CI, CircleCI, Azure Pipelines 4. API spec checking - OpenAPI and Swagger validation for REST APIs 5. Infrastructure as Code - Ansible playbook and Helm chart support 📝 How to Use - Click the extension icon in your browser toolbar - Paste code or click Open to load a file from disk - Schema is auto-detected or select manually from dropdown - Click Validate to check syntax and schema compliance - Click Share to copy a link and send to your team - Click Save to download the validated file 🌐 Companion Website — yamlvalidator.dev Use the same validator online at yamlvalidator.dev: ◆ Validate YAML online without installing any extension ◆ Same 11 schemas with auto-detection ◆ Open, edit, and save files in your browser ◆ Share via compressed URL with your team ◆ Works on any browser — Chrome, Firefox, Safari, Edge ◆ Your data never leaves your machine 🔍 Linting and Formatting Comprehensive code quality features included: ▪ Detect syntax errors instantly as you type ▪ Check structure against json schema specifications ▪ Format code to improve readability and consistency ▪ Verify configuration structure before deployment ▪ Multi-document parsing supporting complex configuration bundles ❓ 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 50+ resource types. Q: Can I use it without installing the extension? A: Yes, visit yamlvalidator.dev to validate YAML online in any browser. ✅ Download this configuration file validator to check manifests, pipelines, and specs. Supports kubernetes validation, docker compose checking, and 11 schema types. Open, edit, share, and validate files directly in your browser.