JSON to YAML Converter

The JSON to YAML Converter is a free online tool that convert json to yaml instantly with configurable indent, line width, and key sorting. 100% client-side — nothing uploaded.. It runs entirely in your browser with no installation or sign-up needed.

No — conversion runs entirely in your browser using js-yaml. Safe for secrets, configs, and internal API payloads.

YAML is standard for Kubernetes, Docker Compose, GitHub Actions, GitLab CI, Ansible, and CircleCI. It supports comments and a more readable indentation-based layout.

Indent sets nesting spaces (2 is most common, 4 for some Python/Ansible styles). Line width controls when long strings fold — 80/120 to match editor rulers, or unlimited.

Yes, the JSON to YAML Converter is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.

Absolutely. The JSON to YAML Converter processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the JSON to YAML Converter is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the JSON to YAML Converter in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The JSON to YAML Converter works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

Converting JSON to YAML is fully lossless because YAML is a superset of JSON: every object, array, string, number, boolean, and null has an exact YAML equivalent, so no data or structure is dropped. Going the other way is not always reversible, though. Once you hand-edit the YAML you may add comments, anchors, or richer scalar types that have no JSON counterpart, and those are discarded if you convert back. For that reason, treat the YAML as your source of truth after you start editing it rather than round-tripping repeatedly. This tool only handles the JSON-to-YAML direction, re-expressing your exact data structure with no changes to values. Paste your JSON above and the equivalent YAML appears instantly, ready to copy or download as a .yaml file.

YAML supports anchors and aliases (&anchor and *alias) that let you define a block once and reference it elsewhere, which can shrink files with repeated data. This converter intentionally disables that feature, so any structure that appears multiple times is written out in full each time. The reason is portability and predictability: not every YAML parser or tool resolves references the same way, and inlined output is guaranteed to be accepted everywhere and easy to read at a glance. It also means the YAML maps one-to-one onto your original JSON, which had no concept of references to begin with. If you later want to deduplicate by hand for a specific tool, you can add anchors yourself. Paste your JSON above to get clean, fully-expanded YAML that any parser will accept.

By default the converter preserves the original key order from your JSON, so the YAML mirrors the document you pasted. Switching on Sort keys instead orders every key alphabetically at each nesting level, producing deterministic output: the same input always yields the exact same byte-for-byte result. That is genuinely useful when you want clean diffs between two configs, since reordered-but-identical files no longer show spurious changes in version control, and it keeps committed files tidy and predictable. The trade-off is that meaningful ordering, like putting name and version at the top of a manifest, gets shuffled, so leave sorting off when human readability of a specific layout matters more than consistency. Toggle the Sort keys button above to compare both layouts and pick whichever suits your workflow before copying the YAML.

The converter parses your input with the browser's native JSON parser before producing any YAML, so malformed input never silently generates broken output. If something is wrong, the validity badge flips from Valid to Error and an alert shows the parser's exact message, such as an unexpected token or an unterminated string. When the error includes a position, the tool also estimates the line number so you can jump straight to the stray comma, missing brace, or unquoted key instead of scanning the whole document. Common culprits are trailing commas, single quotes instead of double quotes, and comments, none of which strict JSON allows. Fix the highlighted spot and the YAML regenerates instantly as soon as the input becomes valid. Paste your JSON above and use the live error message to pinpoint and clean up any syntax problems quickly.

Both are valid YAML; the right choice depends on the tool that will read the file. Two spaces is the most common convention and matches what Kubernetes manifests and Docker Compose files typically use, so it is the safest default for those ecosystems. Four spaces is favored in some Python-adjacent and Ansible style guides, where the wider indent makes deeply nested structures easier to scan. What matters most is consistency within a project, since mixing widths in a single file can confuse both humans and stricter parsers. This converter lets you switch between 2 and 4 spaces and regenerates the output instantly, so you can preview each style against your real data. Pick the indent that matches your target tool's convention above, then copy or download the YAML when it looks right.