Format, validate, minify YAML and convert between YAML and JSON. Real-time validation with error position reporting. Works entirely in your browser.
Paste YAML or JSON. Select mode and click Execute.
YAML strictly relies on spaces (never tabs) for indentation to denote structure and hierarchy. Each level of nesting must use a consistent number of spaces—typically 2 spaces per level. Mixing tabs and spaces or using inconsistent indentation will cause parse errors. This tool normalizes indentation when formatting, ensuring valid YAML output that conforms to the YAML 1.2 specification.
Frequent YAML pitfalls include: unquoted strings containing special characters (:, {, }, [, ], ,, &, *, #, ?, |, -, <, >, =, !, %, @, `) which are interpreted as syntax; misaligned array items where list elements don't share the same indentation; duplicate keys in mappings (later values override earlier ones silently); and incorrect boolean interpretation (yes/no, on/off, true/false are parsed as booleans unless quoted). This tool validates and highlights errors with exact line and column positions.
Converting between YAML and JSON enables interoperability across CI/CD workflows: Kubernetes and Helm use YAML for manifests; GitHub Actions, GitLab CI, and CircleCI accept YAML configs; while package.json, tsconfig.json, and many APIs require JSON. YAML's human-readable syntax (comments, anchors, multiline strings) simplifies authoring, while JSON's strict structure ensures machine parsing. This tool handles both directions losslessly for valid input.
YAML powers modern infrastructure as code, from Kubernetes manifests and Helm charts to CI/CD pipelines and application configuration. Its readability depends on consistent indentation, yet a single misplaced space can break a deployment or silently alter behaviour. The DevPouch YAML Formatter is an online YAML formatter that lets developers format, validate, and minify YAML instantly, entirely in the browser. There are no uploads, no server round-trips, and no risk of exposing sensitive configuration files. Paste raw YAML, watch indentation normalise in real time, and catch syntax errors before they reach production. It supports real-time validation with error position reporting, so you know exactly where to fix malformed blocks.
Format Kubernetes deployment files and Helm charts so manifests stay readable and version-control friendly. Validate Ansible playbooks and Docker Compose files before they run, preventing indentation errors that stall deployments. Convert YAML to JSON for applications that consume JSON APIs, or convert JSON back to YAML for human-friendly configuration editing. Minify YAML to reduce file size in CI artefacts and configuration bundles. Lint configuration as part of a local review workflow, checking spacing, key order, and structural validity without leaving your browser. Teams also use it to standardise config files across environments, ensuring staging and production manifests match exactly.
Because the tool runs client-side, your YAML never leaves your machine. Use it for local config cleanup, pre-commit checks, or quick conversions between YAML and JSON. The DevPouch YAML Formatter is a free, privacy-first online formatter that helps developers ship reliable configuration faster.
Bookmark the YAML Formatter for everyday DevOps tasks, and pair it with the JSON YAML converter when you need to move data between formats. Clean configuration means fewer incidents, faster reviews, and more predictable deployments across every environment.
