YAML Viewer

A free, offline, multi-language YAML Viewer app.

YAML Viewer is an offline app to read, validate and explore YAML on your phone — perfect for anyone who lives in config files.

For example, paste a Kubernetes manifest, a docker-compose.yml, a GitHub Actions workflow, an Ansible playbook or an OpenAPI spec, and instantly get

beautiful syntax highlighting, real-time validation with precise error locations, and an interactive tree view you can expand, collapse and search.

What you get

• Real-time YAML validation with line and column on errors

• Syntax highlighting with line numbers and optional line wrap

• Convert YAML to JSON (and back) with a single tap

• Format, minify, and sort keys

• Interactive collapsible tree with search and JSONPath display

• Stats: keys, lines, depth and size

• Built-in samples: Kubernetes, Docker Compose, GitHub Actions, OpenAPI,

Ansible, and a YAML feature showcase (anchors, aliases, multi-line)

• Open .yaml / .yml / .json files directly from your file manager

• Copy, share, or save the formatted output

• Beautiful light and dark themes that follow your system

• Customisable indent size and live-parse toggle

100% free. No accounts. Works completely offline.

If you build with Kubernetes, Docker, CI/CD, OpenAPI, Ansible, or simply

need to read a config on the go — YAML Viewer is the tool you'll keep

coming back to.