YAML to JSON Converter
Convert YAML to JSON online instantly, or switch to JSON to YAML with a fast, browser-based converter.
CleanTextly's YAML to JSON converter is a free, bidirectional YAML ↔ JSON converter that runs entirely in your browser. Paste YAML and convert YAML to JSON instantly, or switch direction to convert JSON to YAML — both use the same conversion direction toggle at the top of the tool, so you never need a second page. Objects, nested objects, arrays, strings, numbers, booleans, and null values are all preserved correctly in both directions, with clean, readable indentation.
Features
One Tool, Both Directions
Switch between YAML → JSON and JSON → YAML with a single toggle — input and output labels update instantly, with no page reload.
Handles Nested Structures
Nested objects, arrays, and arrays of objects are converted correctly in both directions, not just flat key-value pairs.
Readable, Formatted Output
YAML to JSON output is pretty-printed with 2-space indentation; JSON to YAML output uses clean, standard YAML formatting.
Clear Error Messages
Invalid YAML or JSON shows a specific, readable error — including line and column information when the parser provides it — instead of a blank or broken result.
Preserves Data Types
Strings, numbers, booleans, and null values keep their type in both directions, so "true" doesn't silently become the text "true".
100% Private
Everything runs locally in your browser. Your YAML and JSON are never uploaded, logged, or stored anywhere.
How to Use
- 1
Choose a direction
Select YAML → JSON or JSON → YAML from the Conversion Direction toggle at the top of the tool.
- 2
Paste your data
Add your YAML or JSON into the input box, based on the direction you picked.
- 3
Review the converted result
The output updates automatically. A clear error message appears instead if the input isn't valid.
- 4
Copy or clear
Copy the converted result with one click, or clear both fields to start over.
Example
Converting YAML to JSON
YAML Input
name: CleanTextly version: 1 features: - JSON Formatter - YAML Converter active: true
JSON Output
{
"name": "CleanTextly",
"version": 1,
"features": [
"JSON Formatter",
"YAML Converter"
],
"active": true
}Common Use Cases
Migrating Configuration Files
Convert YAML config files (Docker Compose, Kubernetes manifests, CI pipelines) to JSON for tools or scripts that expect JSON, or the reverse.
Working with APIs
Turn a JSON API response into YAML for a more compact, readable config file, or convert a YAML config back to JSON to send in a request.
Debugging & Inspecting Data
Convert deeply nested YAML to JSON (or vice versa) to more easily spot structural issues or missing values.
Moving Data Between Tools
Convert between formats when one tool or platform outputs YAML and another expects JSON, without hand-editing the structure.
Frequently Asked Questions
A YAML to JSON converter takes YAML — a human-readable data format often used for configuration files — and rewrites it as equivalent JSON, preserving the same structure, keys, and values.
Select YAML → JSON, paste your YAML into the input box, and the converted JSON appears automatically. Copy it with one click when you're ready.
Select JSON → YAML using the direction toggle, paste your JSON into the input box, and the converted YAML appears automatically.
Neither is strictly "better" — YAML is often preferred for hand-written config files because it supports comments and reads cleanly without braces or quotes, while JSON is simpler to parse and more common for APIs and data interchange. Which one to use usually comes down to what your tools and teammates already expect.
Yes. Nested objects — objects inside objects, several levels deep — are converted correctly, keeping every level's structure intact in the JSON output.
Yes. Arrays, objects, and arrays of objects are all supported and convert correctly in both directions.
Yes, for typical config-file-sized documents. Conversion happens entirely in your browser, so very large files are limited only by your device's available memory rather than any upload limit.
No. All conversion happens entirely in your browser. Your data is never uploaded, logged, or sent to a server.
You'll see a specific, readable error message describing what's wrong — such as a badly indented value or an unclosed structure — instead of a blank or broken result.
The JSON output from YAML → JSON is already pretty-printed with 2-space indentation. If you need to reformat or minify JSON separately, CleanTextly's JSON Formatter handles that.
JSON uses braces, brackets, and quotes to mark structure, while YAML uses indentation and largely omits punctuation, making it more compact to read and write by hand. Both represent the same kinds of data — objects, arrays, strings, numbers, booleans, and null — so converting between them doesn't change the underlying data, only its syntax.
Related Tools
New to converting between the two formats? Read our guide to converting YAML to JSON.