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Convert JSON data to YAML format with proper indentation, key ordering preservation, comment support, multi-line string handling, and validation for configuration files, Kubernetes manifests, and YAML-based data structures.
Note: AI can make mistakes, so please double-check it.
YAML output will appear here...Common questions about this tool
Paste your JSON data into the converter and it automatically transforms it to YAML format with proper indentation. The conversion preserves data structure, nesting, and values while converting to YAML's more human-readable syntax.
JSON uses braces and brackets with strict syntax, while YAML uses indentation and is more human-readable. YAML supports comments and multi-line strings, making it popular for configuration files. Both represent the same data structure.
Yes, use the YAML to JSON Converter tool to convert YAML data back to JSON format. The conversion preserves all data, though YAML-specific features like comments are lost in JSON (which doesn't support comments).
YAML is widely used for configuration files, Kubernetes manifests, Docker Compose files, CI/CD pipelines, and application settings. It's preferred over JSON when human readability and comments are important.
Yes, the converter accurately preserves all JSON data types including strings, numbers, booleans, null values, arrays, and objects. YAML represents these types naturally, maintaining data integrity during conversion.
Verified content & sources
This tool's content and its supporting explanations have been created and reviewed by subject-matter experts. Calculations and logic are based on established research sources.
Scope: interactive tool, explanatory content, and related articles.
ToolGrid — Product & Engineering
Leads product strategy, technical architecture, and implementation of the core platform that powers ToolGrid calculators.
ToolGrid — Research & Content
Conducts research, designs calculation methodologies, and produces explanatory content to ensure accurate, practical, and trustworthy tool outputs.
Based on 2 research sources:
Learn what this tool does, when to use it, and how it fits into your workflow.
This tool converts JSON text into YAML. You paste JSON or upload a JSON file. The tool parses the JSON and turns it into YAML with two-space indentation. You can view the result as code or as a tree. You can copy the YAML or download it as a file. So you go from JSON to YAML in one step.
JSON is common for APIs and configs. YAML is common for config files, Kubernetes, and other tools that prefer indentation and readability. You may have data in JSON and need it in YAML. Doing it by hand is slow and easy to get wrong. This tool parses the JSON and uses a standard library to dump it as YAML. It keeps key order and uses a fixed indentation. So you get valid YAML that matches your JSON structure.
The tool is for developers and anyone who works with JSON and YAML. You do not need to be an expert. You provide the JSON and read or copy the YAML. An optional Analyze button sends your JSON to a remote service and may return a short text about the structure; that feature can fail and the main conversion does not depend on it.
JSON uses braces and brackets. Keys and values are in quotes. YAML uses indentation. Keys and values often have no quotes. Both can represent the same data: objects, arrays, strings, numbers, booleans, and null. Converting JSON to YAML means taking the parsed structure and writing it in YAML form. The tool uses a standard YAML library that turns JavaScript objects into YAML text. So the same data is shown in YAML syntax. A related operation involves converting YAML to JSON as part of a similar workflow.
The tool parses your input with JSON.parse. If the input is not valid JSON you see an error (for example Invalid JSON format) and no YAML is shown. The tool also checks how deeply nested the structure is. If it is over 100 levels deep the tool shows an error and does not convert. That prevents the browser from freezing. So the tool only converts valid, reasonably nested JSON.
The YAML output uses two spaces per level. Key order is preserved (the tool does not sort keys). Long lines are not wrapped (no line width limit). Invalid or circular references are skipped so the conversion does not hang. So the output is readable and matches the input order.
People struggle when they convert by hand. They miss commas or brackets. They get the indentation wrong in YAML. This tool does the conversion in the browser and shows the result. You can switch between a code view (the raw YAML text) and a tree view (the same data as an expandable tree). So you can check the structure and copy the YAML you need. For adjacent tasks, converting JSON to XML addresses a complementary step.
You have a JSON config and need it in YAML for a tool that expects YAML. You paste the JSON. The tool shows the YAML. You click Copy and paste it into your config file. So you get YAML without retyping.
You have a JSON file from an API. You upload the file. The tool converts it and shows the YAML. You switch to Tree view to browse the structure. You click Download to save the YAML file. So you get a file you can use elsewhere.
You are building a Kubernetes manifest or similar YAML. You have the data in JSON. You paste it and get YAML with two-space indentation and key order preserved. You copy the result into your manifest. So you keep the structure and format you need. When working with related formats, converting XML to JSON can be a useful part of the process.
You want a short description of the JSON structure. After the conversion you click Analyze. If the service responds you see text in the Structure Analysis modal. You read it or copy it. If you see an error you still have the YAML and can copy or download it.
The tool says Invalid JSON format. You check the JSON for missing commas, extra commas, or unquoted keys. You fix the input and the tool converts again. The tool says the structure is too deeply nested. You simplify the JSON or use a smaller part of it.
The tool reads your input as text. It trims and, if non-empty, parses it with JSON.parse. If parsing throws an error the tool sets the validation state to invalid and shows the parser message (for example Invalid JSON format). If parsing succeeds the tool checks the nesting depth of the resulting object. It walks the structure and counts levels. If the depth exceeds 100 the tool sets invalid and shows JSON structure is too deeply nested (max 100 levels). So only valid, reasonably nested JSON is converted. In some workflows, converting JSON to CSV is a relevant follow-up operation.
The conversion uses a YAML library dump function. The options are: indent 2 (two spaces per level), skipInvalid true (skip invalid values), lineWidth minus 1 (no line wrapping), noRefs true (no circular references), sortKeys false (preserve key order). So the output is indented, ordered like the input, and safe.
The tree view is built from the same parsed object. It shows keys and values; objects and arrays can be expanded. The tree stops expanding after a fixed depth (for example 20 levels) so the page does not hang. So you can browse the structure without loading the full raw text.
Input size is checked before conversion. If the length is over 5 million characters the tool does not convert and shows an error. If the length is over 80% of that limit the tool shows a warning. So you know when the input is too large or close to the limit. For related processing needs, converting CSV to JSON handles a complementary task.
| Limit | Value |
|---|---|
| Max input size (pasted or file content) | 5 MB |
| Max file size (upload) | 10 MB |
| Max nesting depth | 100 levels |
Accepted file types: .json or application/json. The YAML output uses two-space indentation. Key order is preserved. Copy copies the full YAML text. Download saves a file named converted-TIMESTAMP.yaml.
Ensure your JSON is valid before relying on the output. Check brackets, commas, and quotes. Use a JSON validator if the tool says Invalid JSON format and you cannot spot the error. The tool does not fix invalid JSON.
Keep the input under 5 MB. Very large input triggers an error. Input close to the limit may show a warning and conversion may be slow. Simplify or split the data if you hit these limits.
JSON does not support comments. The tool does not add or preserve comments in YAML. The output is a direct conversion of the JSON structure. If you need comments add them after conversion in the YAML file.
Key order is preserved. The order of keys in your JSON is the order in the YAML. If you need a different order change the JSON before converting or edit the YAML after.
Analyze is optional and can fail. You may see Unable to generate analysis at this time. or an error in the modal. The main conversion and copy/download always work when the JSON is valid. Do not rely on Analyze for critical steps.
Use Tree view to explore the structure. Use Code view to copy or edit the raw YAML. Download saves the current YAML output; if you change the JSON the output updates and you can download again.
We’ll add articles and guides here soon. Check back for tips and best practices.
Summary: Convert JSON data to YAML format with proper indentation, key ordering preservation, comment support, multi-line string handling, and validation for configuration files, Kubernetes manifests, and YAML-based data structures.