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YAML Viewer

YAML Viewer - a browser-based file tools utility.

Browser tool

About YAML Viewer

Viewing YAML as a structured tree, so deeply nested configuration is legible and a key sitting at the wrong indentation level becomes visible rather than merely wrong. Free and online, no account required. Your configuration is parsed locally and never uploaded, which matters when it holds secrets.

How to use it

  1. Load the YAMLOpen a configuration file or paste it in; either way the tree is built from what the parser sees.
  2. Follow the nestingThe tree shows the structure the parser sees, which is not always the structure you intended.
  3. Check the typesYAML infers types, and a value you meant as a string may have become a number, a boolean or a date.

YAML guesses types, and sometimes guesses wrong

An unquoted value is interpreted: yes and no can become booleans, 1.10 becomes the number 1.1 and loses its trailing zero, and something like 12:30 can be read as a sexagesimal number rather than a time. A version string or a country code left unquoted is the classic casualty. Quoting forces it to stay a string.

What it does not do

  • Made for reading a document that parses. When one will not parse at all, the validator is the page that locates the fault.
  • Anchors and aliases are shown as the parser resolves them, which may not match how the document reads on the page.

Questions people ask

Why has my version number lost a digit?
Because unquoted 1.10 is a float, and 1.10 as a number is 1.1. Quote it — "1.10" — and it stays the string you meant.
Should I use YAML or JSON for configuration?
YAML is more comfortable to write and read, and it has more ways to mean something unintended — significant whitespace and type inference both. JSON is stricter and noisier. For files humans edit often, YAML usually wins if you quote defensively.

Questions about ToolsVerse itself — privacy, cost, what happens to your files — are answered in the frequently asked questions.

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