Free Tools
Everything you need for YAML
All tools run entirely in your browser. Nothing is sent to a server.
YAML Validator & Formatter
Paste your YAML and instantly detect syntax errors. Auto-format with consistent indentation and clean output.
Most popularYAML → JSON
Convert YAML to JSON instantly. Supports nested structures, arrays, anchors, and multi-document files.
YAML to JSONJSON → YAML
Convert any valid JSON back to clean, readable YAML. Great for writing Kubernetes or CI configs from API responses.
JSON to YAMLYAML → TOML
Migrate configs from YAML to TOML format, used by Rust, Hugo, and more. Handles complex structures cleanly.
YAML to TOMLYAML → ENV
Flatten a YAML config into a .env file format. Ideal for exporting secrets and environment variables.
YAML to ENVYAML Cheatsheet
A complete, printable YAML reference — syntax, types, anchors, multi-line strings, and common patterns.
ReferenceWhy DotYAML
Built for developer speed
Instant results
All processing happens in your browser — zero latency, no round-trips.
Private by design
Your YAML never leaves your machine. No logging, no tracking of your data.
No login needed
Open a tool, use it, done. No accounts, no paywalls, no friction.
Works everywhere
Fully responsive — use it on your laptop, tablet, or phone.
FAQ
Common questions
What is YAML and when should I use it?
YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files, CI/CD pipelines (GitHub Actions, GitLab CI), Kubernetes manifests, Docker Compose, and Ansible playbooks. It's preferred when readability matters more than strict structure.
Is my YAML data safe when I use DotYAML?
Yes. All DotYAML tools run entirely in your browser using JavaScript. Your YAML content is never sent to our servers or stored anywhere. It's as private as your local text editor.
What's the difference between YAML and JSON?
Both represent structured data, but YAML is more readable — it uses indentation instead of braces and brackets, supports comments, and is less verbose. JSON is stricter and more widely used in APIs. YAML is a superset of JSON, meaning valid JSON is also valid YAML.
Can I convert a YAML file with anchors and aliases?
Yes. DotYAML's converter correctly resolves YAML anchors (&) and aliases (*) before converting, so the output reflects the fully merged structure as intended.
Does DotYAML support multi-document YAML files?
Yes. YAML files can contain multiple documents separated by ---. DotYAML's validator and converter handle multi-document files and display each document's result separately.