yaml / jinja

YAML/Jinja Formatter

Paste a YAML file — including ones with Jinja templating like Ansible playbooks or Helm charts — and check its indentation structure, then normalize it to consistent spacing.

Runs fully in your browser · nothing is sent anywhere

input.yaml

Waiting for input…0 chars

output.yaml

Normalized YAML will appear here.

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What this checks and changes

Validates structure — Jinja tags are temporarily masked out, then the result is parsed as YAML. If the indentation makes the document invalid or ambiguous, you'll see the parser's error and roughly where it occurs.
Normalizes indentation only — each line's nesting depth is measured from its original indentation and re-emitted at a consistent 2 or 4 spaces per level. Content, comments, key order, anchors/aliases, and Jinja blocks are copied through untouched — only leading whitespace changes.
Block scalars are protected — content under a | or > literal/folded block (shell scripts, multi-line strings) is shifted as a whole rather than re-indented line by line, so internal formatting inside the block isn't disturbed.
Tabs in leading whitespace are converted to spaces; tabs elsewhere in a line are left as-is.

Known limitations

Multi-line flow collections ({ a: 1, b: 2 }) use bracket-based indentation rules this tool doesn't model — review those sections manually.
Validation happens after Jinja tags are masked, so it can't catch errors caused by the templating logic itself, only the surrounding YAML shape.
This is a formatting aid, not a linter or a template renderer — it won't tell you if your Jinja variables resolve correctly.