How are nulls and booleans handled?

JSON null becomes null, ~ or an empty value depending on the option you pick; booleans and numbers are preserved as scalars.

How do multi-line strings come out?

As literal block scalars (|) so line breaks are kept readable, unless you force quoting, in which case they are escaped inside quotes.

What does the anchors option do?

JSON cannot express shared references, so the tool finds objects that are deeply identical and emits the first as &ref_0 and the others as *ref_0. Turn it off for tools that do not resolve aliases.

Can I round-trip JSON → YAML → JSON?

Yes, for any valid JSON. The YAML to JSON tool reverses this conversion losslessly.

JSON to YAML

Translate JSON into YAML 1.2 with proper indentation and string quoting. Choose the indent, quote style, null style and wrap width, emit anchors for repeated objects, sort keys, and turn a top-level array into a multi-document stream. Ideal for moving config between tools that prefer one format over the other.

Runs locally in your browser

For large JSON, open fullscreen for a wider view

JSON input

0 chars · 1 line

YAML output

Output will appear here…

Indent

Strings

Null

Wrap at

Multi-line strings become literal block scalars (|) automatically unless quoting is forced. Long plain strings fold at the wrap width; choose "Never wrap" to keep them on one line.

YAML to JSON

Convert YAML into strict JSON, with multi-document streams, YAML-only types and duplicate keys handled.

JSON Formatter

Beautify, minify, sort, query and repair JSON with a tree view and copy-as code export.

JSON to CSV

Flatten JSON arrays into CSV with a table preview, column picker, nested-path selection and Excel options.

TOML to JSON

Convert TOML config to JSON and JSON back to TOML, with Cargo, pyproject and netlify presets.

How to use JSON to YAML

1Paste or upload JSON; the YAML appears as you type.
2Adjust indent, string quoting (only when needed, always double, always single), null style and the wrap width.
3Enable anchors to merge identical objects into &ref / *ref, or the multi-document option to emit one document per array element.
4Copy or download the YAML.

About JSON to YAML

JSON to YAML is part of FizzKit — a collection of focused developer and ad-tech tools. Because everything runs locally, it works offline once loaded and never exposes your data to a remote server.

Frequently asked questions

YAML 1.2, which is a strict superset of JSON. Strings that would be misread as booleans or numbers in YAML 1.1 readers (yes, no, on, off, 1_000) are quoted automatically.

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