YAML ⇄ JSON

Convert between YAML and JSON formats

100% gratis. Berjalan sepenuhnya di browser Anda - file dan data Anda tidak pernah meninggalkan perangkat Anda dan tidak ada yang diunggah ke server mana pun.

YAML Input

Drop a YAML or JSON file, click to browse, or paste

YAML, YML, JSON · up to 5 MB · never uploaded

JSON Output

Jump to the next useful tool without leaving your flow.

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Tentang alat ini

YAML and JSON describe the same data model - objects, arrays, strings, numbers, booleans, null - with different syntax. JSON uses explicit braces and brackets, which makes it unambiguous and verbose. YAML uses indentation, which makes it readable and fragile. In fact every valid JSON document is already valid YAML, since YAML 1.2 was defined as a superset, which is why converting JSON to YAML always works cleanly. The other direction has one genuine loss: comments. YAML supports them and JSON has no comment syntax at all, so every explanatory note in a config file disappears on conversion - and configuration files are exactly where comments carry the most value. There are also YAML features with no JSON equivalent, such as anchors and references for reusing a block. Both directions run in your browser, so config files containing credentials are never transmitted.

Cara menggunakan alat ini

  1. Choose the directionYAML to JSON, or JSON to YAML. Each has different consequences.
  2. Paste your inputA config file, an API payload, or a manifest.
  3. ConvertSyntax errors are reported with their position, which for YAML is usually an indentation problem.
  4. Check what was lostConverting YAML to JSON strips comments and resolves anchors. Keep the YAML if those matter.

Mengapa menggunakannya

  • Handles both directions, covering the config-to-API and API-to-config cases.
  • Reports syntax errors with position rather than failing silently.
  • Runs in your browser - config files routinely contain secrets and connection strings.
  • No size limit imposed by a server.
  • No account required.

Penggunaan umum

  • Converting a JSON API response into YAML for a config file.
  • Turning a Kubernetes or Docker Compose manifest into JSON for a tool that requires it.
  • Feeding YAML configuration into code that only parses JSON.
  • Comparing two config files by converting both to one format first.
  • Checking that a YAML file parses to the structure you expect.

Tips untuk hasil lebih baik

  • Keep the YAML original when converting to JSON. Comments are lost permanently and cannot be recovered from the JSON.
  • Every JSON document is already valid YAML, so that direction never fails on structure.
  • Quote version numbers and any value that could read as a boolean before converting - YAML turns 1.10 into 1.1 and no into false.
  • YAML anchors and references are resolved into repeated data on conversion, which makes the JSON larger and loses the reuse.
  • If you only need to tidy YAML rather than change format, the YAML Formatter validates without converting.

Kesalahan yang harus dihindari

  • Converting a commented config to JSON and discarding the YAML, losing every explanatory note.
  • Expecting a YAML to JSON to YAML round trip to return the original file - comments and anchors do not survive.
  • Leaving version numbers unquoted so 1.10 becomes 1.1 in the converted output.
  • Assuming JSON is invalid YAML. It is not - the superset relationship means JSON parses as YAML directly.
  • Pasting production configuration into a converter that uploads it. This one does not.

Pertanyaan yang sering diajukan

For standard data structures, yes - both formats represent the same underlying data (objects, arrays, strings, numbers), so a round trip generally preserves the content, though YAML-specific features like comments won't survive since JSON has no concept of comments.

Basic anchors/aliases (YAML's way of reusing a block of data) are typically resolved into their expanded form when converting to JSON, since JSON has no equivalent shorthand.

Whatever the tool expects - Kubernetes, Docker Compose and most CI systems use YAML, while APIs almost universally use JSON. Where you have a genuine choice, YAML wins for anything a human edits, because it supports comments.

Because JSON has no comment syntax at all - there is nowhere for them to go. This is the main reason to keep the YAML original rather than treating the JSON as a replacement, since config comments usually explain why a value is what it is.

Yes. YAML 1.2 is defined as a superset of JSON, so any JSON document parses as YAML unchanged. That is why converting JSON to YAML always succeeds structurally, while the reverse can lose YAML-only features.

No. Conversion runs in your browser, which matters because config files routinely contain connection strings, API keys and other secrets.

Yes. YAML JSON is free for normal use with no account required, and ToolBox does not add a watermark to your result.

Most tools in this category run in your browser so the file stays on your device. If a tool needs a temporary server job, files are handled for that job only and are not kept as a lasting archive.

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