# YAML Validator

> Online YAML validator and schema checker at yamlvalidator.dev

## What it does

YAML Validator is a browser-based tool for validating YAML syntax and checking YAML files against JSON Schemas. Everything runs client-side — no data is sent to any server.

## Features

- YAML syntax validation with line-level error reporting
- Schema validation against 11 built-in schemas with auto-detection
- Multi-document YAML support (files with multiple `---` separated documents)
- File operations: open from disk, edit in-browser, save/download
- Share YAML snippets via URL (compressed, no backend)
- Dark and light themes
- Keyboard shortcuts (Ctrl+Enter to validate, Ctrl+O to open, Ctrl+S to save)
- Mobile-friendly editor (CodeMirror 6)

## Supported Schemas

- Kubernetes v1.29 (50+ resource types, auto-detected by apiVersion + kind)
- Docker Compose v2.29 (auto-detected by services + image/build)
- GitHub Actions (auto-detected by on + jobs)
- GitLab CI (auto-detected by stages + script)
- CircleCI v2.1 (auto-detected by version + jobs/workflows)
- Azure Pipelines v1 (auto-detected by trigger + pool)
- Bitbucket Pipelines (auto-detected by pipelines field)
- Ansible 22.4 (auto-detected by hosts + tasks)
- Helm Chart v2 (auto-detected by apiVersion + type chart)
- OpenAPI 3.0 (auto-detected by openapi + paths)
- Swagger 2.0 (auto-detected by swagger + paths)

## Privacy

All parsing and validation happens entirely in the browser. Your YAML data never leaves your machine. The site uses privacy-friendly analytics (PostHog, cookieless mode) with no personal data collection.

## Browser Extension

YAML Validator is also available as a Chrome Extension that adds validation, formatting, and code folding directly in the browser, including on GitHub YAML files.

Install: https://chromewebstore.google.com/detail/yaml-validator/jokkhfinnhgafmdiobjjahgefekgjajp

## Links

- Website: https://yamlvalidator.dev
- Chrome Extension: https://chromewebstore.google.com/detail/yaml-validator/jokkhfinnhgafmdiobjjahgefekgjajp