YAML Formatter

When to use YAML Formatter

Your GitHub Actions workflow just failed with `yaml: line 47: did not find expected key` — and the raw file looks fine to you because your editor isn't showing the mixed-tab problem buried four levels deep in an `env:` block. Paste the YAML here and the formatter calls js-yaml under the hood, shows consistent 2-space indentation, and surfaces the parse error with a line number you can actually act on. Also useful for tidying up a Kubernetes manifest before code review, converting a YAML config to JSON for an API that doesn't speak YAML, or verifying a Docker Compose file before you push to prod. Your data stays in the browser tab — nothing is stored or transmitted.

• Fix a GitHub Actions workflow failing on a mixed-indent error
• Tidy a Kubernetes manifest before opening a pull request
• Convert a Helm values file to JSON for a REST API call

About this tool

YAML is readable when it's well-formatted and a debugging nightmare when it isn't — especially when a CI pipeline rejects your config with a cryptic parse error at line 47. Paste your YAML and get it beautified with consistent indentation and error highlighting that points to exactly where the structure breaks. Also converts between YAML and JSON if you need to cross-reference or adapt a config. Useful for Kubernetes manifests, GitHub Actions workflows, Docker Compose files, and any tool that uses YAML as its config format. Your data stays on your device — no server processes it. Fix the config, copy, move on.