YAML to JSON Converter
Convert YAML config such as Kubernetes manifests, Docker Compose, and CI pipelines into clean JSON, with key sorting and indentation control — all in your browser.
YAML to JSON Converter
JSON to YAML Converter
YAML to TOML Converter
YAML to JS Object Converter
TOML to JSON Converter
JS Object to JSON Converter
Convert YAML config such as Kubernetes manifests, Docker Compose, and CI pipelines into clean JSON, with key sorting and indentation control — all in your browser.
About the YAML to JSON converter
Parsed YAML with formatted JSON output
The converter parses YAML mappings and sequences, then serializes the result as JSON. Nested mappings become JSON objects, sequences become arrays, and formatting options control indentation with 2 spaces, 4 spaces, or tabs.
Review YAML-only syntax after conversion
JSON cannot carry YAML comments, anchors, aliases, or presentation choices. Use the output for data interchange and review configuration files before replacing hand-written YAML.
FAQ
Common questions and answers about this topic.
What is the difference between YAML and JSON?
YAML uses indentation-based structure and supports comments, multi-line strings, and anchors/aliases. JSON uses curly braces and square brackets with strict quoting rules. JSON is more widely supported by APIs and programming languages.
Can I customize the JSON indentation?
Yes, JSON indentation can be set to 2 or 4 spaces, or tabs, via the formatting options. For JSON output, 2 spaces is compact while 4 spaces improves readability in deeply nested structures.
Can I sort the keys alphabetically?
Yes, use the sort keys dropdown to arrange all JSON object keys in alphabetical order (A to Z) or preserve the original sequence from your YAML input. The sorting is applied recursively through all nesting levels.
Why are my YAML anchors and aliases expanded in the JSON?
JSON has no reference mechanism, so every alias (*name) is replaced with a full copy of the value its anchor (&name) points to. For example, an anchored list reused three times becomes three independent copies in the JSON output, which is expected and keeps the data self-contained.
Where did my YAML comments go after conversion?
JSON has no comment syntax, so any
Why does my YAML with --- separators fail to convert?
A single JSON value cannot hold multiple documents, so a YAML stream that uses --- to separate several documents reports an invalid-YAML error. Convert one document at a time by removing the --- markers, or wrap the documents into a single YAML sequence first.
Is my data sent to any server?
No, the YAML-to-JSON conversion runs entirely in your browser. Your YAML data is processed locally with JavaScript and never transmitted to any external server.