JSON to YAML Converter
Paste JSON, get YAML — converted in your browser with clean block formatting and a copy button.
- Free
- No account
- Runs in your browser
- Nothing uploaded
title: Getting Started
tags:
- guide
- config
author:
name: Alice
active: true
views: 1280Runs entirely in your browser — your input is never uploaded, logged, or stored.Privacy policy
What is JSON to YAML Converter?
JSON and YAML are both ways to store structured data as text, and they are used for many of the same jobs — configuration files, API payloads, and data exports. JSON is strict: braces, brackets, and commas, with every name and string in double quotes. YAML is the more human-friendly of the two: it uses indentation instead of braces, and you can often leave values unquoted. That readability is why YAML is the default for so many config files, from CI pipelines to Kubernetes manifests.
This tool converts JSON into YAML. You paste valid JSON, and it returns the same data laid out as a clean YAML document — objects become indented mappings and arrays become block sequences. Nothing is uploaded: the conversion runs entirely in your browser, so it is safe for private or work configuration that you prefer not to send to a server.
The reverse direction is also built: the YAML to JSON Converter turns YAML back into JSON, so the two tools together let you move data between formats in either direction without losing anything.
The tool parses your input as JSON first, so malformed JSON fails with a clear message before any YAML is produced. It then renders the parsed value as YAML using block style with two-space indentation:
• Objects become nested mappings — "name: Alice". • Arrays become block sequences — leading dashes, one per item. • Scalars (strings, numbers, booleans, null) carry over in their YAML form. • The library quoted only when strictly necessary, so simple values stay unquoted.
Because YAML is indentation-sensitive, a malformed hand-written YAML can mean something different from what it looks like. Producing YAML from JSON avoids that risk entirely — the output is generated, not typed, so the indentation is always consistent and correct.
Worked examples
- {"name":"Alice","age":30} → name: Alice / age: 30
- {"user":{"name":"Alice","city":"Paris"}} → user:\n name: Alice\n city: Paris
- [{"id":1,"name":"Alice"},{"id":2,"name":"Bob"}] → a two-item block sequence
How to use JSON to YAML Converter
- Copy the JSON you want to turn into YAML.
- Paste it into the input box.
- The tool converts it live and shows the YAML on the right.
- Click Copy YAML to copy the output, or copy it straight from the output box.
Common errors
- My input won't convert — the tool accepts valid JSON only. Check for trailing commas, missing quotes around names, or a stray brace; the error tells you it isn't valid JSON rather than guessing.
- My numbers show up fine but a leading zero disappeared — JSON itself has no leading zeros, so the parser may treat a value like 007 as 7. That is expected JSON semantics, not a conversion bug.
- My output wraps a long string onto one very long line — block style keeps long scalar values on a single printed line, which is normal; you can still copy it.
FAQ
Where does my JSON go?
Nowhere. The conversion happens entirely in your browser — the JSON string is parsed and re-rendered as YAML locally, and nothing is uploaded to a server.
Will the conversion lose any data?
No. JSON and YAML represent the same structured data, and the conversion is lossless — every key, value, and array item from the JSON appears in the YAML. Only the formatting (braces and commas give way to indentation) changes.
Why is indentation important in YAML?
Unlike JSON, which uses braces and brackets, YAML conveys structure through indentation. Two spaces under a key mean nesting. That is why this tool generates the YAML rather than asking you to type it — the indentation is always consistent, so the result parses correctly.
What is the difference between this and the YAML to JSON Converter?
They are the reverse of each other. This tool converts JSON into YAML; the YAML to JSON Converter converts YAML back into JSON. Together they let you move data between both formats in either direction.
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