YAML to JSON Converter
Paste your YAML configuration below and this yaml to json converter outputs clean, properly bracketed JSON, ready for your application.
About
About YAML to JSON Converter
YAML and JSON describe the same kinds of data, objects, arrays, strings, numbers, booleans, but YAML relies on indentation to show structure while JSON uses brackets and braces explicitly. This yaml to json converter translates between the two automatically, which matters constantly since tools like Docker and Kubernetes are written in YAML while most web APIs and JavaScript applications expect strict JSON.
YAML is genuinely more fragile than it looks, because its entire structure depends on consistent indentation rather than explicit delimiters. Mixing tabs and spaces, or indenting a nested item by just one space too few, changes what the parser thinks belongs to what, sometimes without throwing an obvious error. JSON's brackets make the same mistake far more visible and far less likely to happen silently.
YAML also supports a few things JSON has no equivalent for, comments starting with #, and anchors and aliases that let one part of a file reference and reuse another part. None of that survives conversion to JSON, since JSON has no concept of comments and no built-in way to express a reference, so anchors get expanded into their full repeated values and comments are simply dropped.
Paste your YAML and the converter outputs valid JSON immediately, correctly quoting string keys, adding the necessary commas and brackets, and converting YAML-specific scalars like unquoted true or null values into their JSON equivalents. It also works in reverse, turning a JSON file back into more human-readable YAML for a config file you're about to hand-edit.
This runs entirely in your browser, which is worth knowing if the file in question is a Kubernetes manifest or a deployment config with environment-specific values in it. None of that gets sent anywhere, it's parsed and converted locally and that's the end of it.
FAQ
Frequently asked questions
Why do so many config files use YAML instead of JSON?
YAML was designed specifically to be easy for a human to read and write, using indentation instead of the braces and quotation marks JSON requires. That readability is exactly why tools like Docker Compose, Kubernetes, and GitHub Actions default to YAML for their configuration files.
What YAML features get lost when converting to JSON?
Comments are dropped entirely, since JSON has no syntax for them. Anchors and aliases, YAML's way of referencing and reusing a value elsewhere in the same file, also don't survive, they get expanded into their full value wherever they're used.
Why does my conversion fail with what looks like a formatting error?
YAML is extremely sensitive to indentation, and mixing tabs with spaces, or being inconsistent about how many spaces represent one indent level, is the most common cause of a parsing failure. Check that your file uses consistent, space-only indentation throughout.
Is it safe to convert a deployment or infrastructure config file here?
Yes, all parsing and translation happens locally in your browser's JavaScript engine. Your configuration values, including anything environment-specific, are never transmitted anywhere.
Does this tool also convert JSON back into YAML?
Yes, it works both directions. Paste in a strict JSON file and it outputs clean YAML with the brackets and quotation marks stripped away, which is often more pleasant to hand-edit afterward.
What happens to boolean and null values during the conversion?
YAML's unquoted true, false, and null values convert directly to JSON's own true, false, and null, since both formats share the same underlying data types even though they write them with slightly different syntax rules.
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