JSON to YAML Converter
Convert JSON to YAML and back — clean output, both directions, entirely in your browser.
name: Complete Toolkit features: - fast - private - free config: signup: false tools: 76
Handles the common YAML subset — mappings, sequences, nested structures and scalars. For complex YAML with anchors, multi-line blocks or custom tags, verify the output.
About this tool
JSON and YAML describe the same data structures in different clothes: JSON with its braces and brackets is what APIs and JavaScript speak, while YAML with its clean indentation is what configuration files prefer — Docker Compose, Kubernetes, GitHub Actions, countless CI pipelines. Moving between them is a constant devops and development task, and this converter does it both ways with clean, correctly-indented output.
JSON to YAML strips the syntactic noise: braces, brackets and most quotes disappear, replaced by indentation and dashes, producing the readable form config files use. YAML to JSON goes the other way, turning a config file into the structured form a program or API expects. A Swap button flips the direction and moves the output to the input, so round-tripping and chained edits are one click.
The converter is fully self-contained — the serialization and parsing run in your browser with no library calls to any server, so your configuration data (which often contains secrets, hostnames and infrastructure details) never leaves your device. It handles the common YAML subset that covers the vast majority of real config files: mappings, sequences, nesting, and properly-typed scalars. For exotic YAML features — anchors, aliases, multi-line block scalars, custom tags — the tool notes that you should verify the output, since those go beyond what most converters reliably handle.
How to use the JSON to YAML Converter
- 1Choose JSON → YAML or YAML → JSON.
- 2Paste your data on the left — the converted form appears live on the right.
- 3Click Copy to grab the result, or Swap to reverse direction and continue editing.
- 4For YAML with anchors or multi-line blocks, verify the output.
Frequently asked questions
Why use YAML instead of JSON for config?
YAML is easier for humans to read and write: no braces to balance, no quotes around most strings, and it supports comments (which JSON doesn't). That's why Docker, Kubernetes, GitHub Actions and most CI tools use it for configuration. JSON wins for data interchange between programs.
Is my data sent to a server?
No — both the JSON parsing and the YAML conversion run entirely in your browser. This matters because config files routinely contain secrets, API keys, database hostnames and infrastructure details. Nothing is transmitted or logged.
Does YAML support comments and JSON doesn't?
Correct — YAML allows # comments, one of its main advantages for config files. JSON has no comment syntax at all. Note that converting YAML with comments to JSON drops the comments, since JSON can't represent them.
What YAML features aren't fully supported?
The converter handles the common subset — mappings, sequences, nesting, scalars — which covers most real config files. Advanced features like anchors/aliases (&, *), multi-line block scalars (|, >), and custom tags (!!) are less common and should be verified in the output if your file uses them.
Related tools
JSON Formatter & Validator
Format, minify and validate JSON instantly — with exact error positions when something's wrong.
Open toolJSON Diff Checker
Compare two JSON documents structurally — see exactly what was added, removed or changed, at every level.
Open toolCSV ↔ JSON Converter
Convert CSV to JSON and back — with real CSV parsing that handles quotes, commas and line breaks in fields.
Open toolBase64 Encode / Decode
Convert text to Base64 and back — UTF-8 safe, so emoji and non-English characters survive.
Open tool