JSON to YAML Converter

Convert JSON into readable YAML for configs and pipelines. Free in your browser — no sign-up, no watermarks.

Drop your JSON files here

or click to browse — Select multiple files for batch conversion

json

⚡ Instant — conversion starts the moment you add files. No sign-up, no watermarks. Why FileHugger

🔍 How your file is processed
Runs
In your browser on this page
Engine
In-browser JavaScript converters with no external libraries (XML parsing uses the browser's built-in DOMParser)
Max input
512 MB per file (or paste text directly)
Your file
Processed in this browser tab — the file is not uploaded. Converted results are kept in this browser's local storage for up to two hours so their matching download page can show them; expired results are removed on the next site visit. Nothing is stored on our servers.
Good to know
Format limits apply: nested JSON values are embedded as JSON text inside a single CSV cell (not expanded into columns), and CSV values are always imported as text — no number or boolean detection is attempted.

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Or paste your JSON content directly:

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How to convert JSON to YAML

  1. Click Choose files (or drag & drop) and select one or more JSON files. You can also paste the input text directly into the box below the uploader.
  2. Review the options (delimiter is auto-detected for CSV) — usually the defaults are exactly right.
  3. Press Convert to YAML. Each file is converted with a live progress indicator.
  4. Open the download page to save your files individually or grab everything as a single ZIP.

Why convert JSON to YAML?

Kubernetes manifests, CI pipelines and Docker Compose files are written in YAML. Paste the JSON you have — an API response, a config export — and get equivalent YAML with sane indentation and correct quoting, ready to drop into your repo.

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What this tool preserves — and what it changes

✓ Preserved

  • The entire data structure one-to-one — YAML's data model is a superset of JSON's, so nothing is dropped or approximated
  • String-ness under reparsing: values like 'no', 'on', 'null' or '1.10' are single-quoted so no YAML parser can flip them into booleans or numbers (the classic Norway problem)
  • Multi-line strings, emitted as |- block scalars — every interior line break survives (the '-' chomp trims trailing newlines)

↺ Changed

  • Indentation is 2 spaces throughout — the convention Kubernetes, CI and Compose files use
  • Repeated structures are written out in full each time; the converter never emits anchors or aliases
  • Empty arrays and objects stay inline as [] and {}

Known limits & edge cases

  • Keys get the same protective quoting as values — an unquoted 'on:' key would change meaning in YAML 1.1 parsers
  • Invalid JSON is refused with the parser's message; a bare top-level scalar is valid input and emits a one-line document

Engine: In-browser JavaScript converters with no external libraries (XML parsing uses the browser's built-in DOMParser). These statements describe the engine as shipped on 2026-10-02 — behaviour changes are recorded in the changelog.

About the formats

What is a JSON file?

JSON is the standard data format of the modern web. APIs, config files and databases exchange structured data as JSON because it is human-readable, supports nesting, and maps directly to objects in every programming language. Converting between JSON and CSV, XML or YAML is everyday work for developers, analysts and anyone wiring two systems together.

What is a YAML file?

YAML is a human-friendly data format built around indentation instead of brackets. It dominates DevOps: Docker Compose, Kubernetes, GitHub Actions and most CI/CD pipelines are configured in YAML. It represents the same data model as JSON, so converting between the two is lossless for typical documents — handy when a tool wants one and you have the other.

JSON vs YAML at a glance

JSONYAML
TypeStructured dataStructured data
CompressionTextText
Typical useAPIs, configuration, data exchangeDevOps configs, CI/CD, Kubernetes

The same data, made reviewable

JSON is written by machines; YAML is read by people — and modern infrastructure reads YAML too: Kubernetes manifests, CI pipelines, Docker Compose, Ansible, most every config file in a repository. This converter turns JSON into YAML with two-space indentation and safe quoting, shedding the braces, brackets and comma discipline while keeping the data byte-for-byte equivalent.

The reliable workflow: generate or export as JSON (where tooling is strongest), convert to YAML (where reading is easiest), and let the config live in version control as YAML — where diffs in a code review show clean changed lines instead of re-flowed punctuation. YAML’s one demand is that indentation now carries meaning; the converter’s consistent two-space output is exactly what linters and reviewers expect.

Frequently asked questions

Is this JSON to YAML converter free?

Yes — completely free, with no sign-up, no watermarks and no daily quota. Processing happens in this browser, so the practical limit is the memory available on your device.

Can I convert multiple JSON files at once?

Yes. Select or drop as many files as you like — each one is converted in sequence with its own progress status, and you can download the results individually or all together as a ZIP archive.

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