Zero Snippet

JSON to YAML converter for configs, Kubernetes & APIs

Use this free JSON to YAML converter online when you need human-readable YAML from strict JSON documents. It is built for Kubernetes manifests, Helm-style data, Docker Compose snippets, CI variables, and internal configuration management. Parsing and YAML generation run in your browser—ideal when you must keep payloads off the server.

Convert JSON to YAML

Valid JSON only—no comments or trailing commas. Conversion runs in your browser.

Why convert JSON to YAML?

JSON is the lingua franca of REST APIs, browser storage, and many build pipelines. YAML appears everywhere operations teams work: Kustomize overlays, sample objects in the Kubernetes documentation, Ansible inventories, and GitHub Actions workflows written by hand. When you receive or generate JSON but your target expects YAML, a reliable JSON-to-YAML transformation saves manual retyping and reduces indentation mistakes.

This page is also a practical companion to our YAML to JSON converter for round-tripping configs, and to the JSON formatter and validator when you need to fix invalid JSON before you convert.

How to use this JSON to YAML tool (step by step)

  1. Paste a complete JSON document—an object { } or an array [ ]. You can start from Use sample to see a small ConfigMap-style example.
  2. Choose Sort keys (A–Z) if you want deterministic ordering for Git diffs; leave it off to preserve key order as closely as the runtime allows.
  3. Pick two- or four-space indentation to match your style guide or linter defaults.
  4. Click Convert to YAML. Read any error message at the bottom—usually a missing comma, trailing comma, or non-JSON syntax such as comments.
  5. Use Copy YAML or Download .yaml to move the result into your editor, merge request, or cluster workflow.

JSON vs YAML: what changes in the output?

Structurally, the data model stays the same: strings, numbers, booleans, null, objects, and arrays map cleanly between formats. Visually, YAML drops many braces in favor of indentation, may inline simple objects as flow mappings, and can represent multiline strings with block scalars once you edit the file by hand. Because JSON has no comments, this converter will not add # lines for you; add them after conversion if your tooling allows.

Kubernetes, Helm, and cloud-native workflows

Platform teams often sketch resources in YAML, but automation and APIs emit JSON—for example when you export an object from a control plane or transform OpenAPI examples. Converting those blobs into YAML makes them easier to read in code review and to align with in-repo conventions. Always run kubectl apply --dry-run or your admission tests before applying converted manifests to production; semantic validation is outside the scope of a pure format converter.

Tabular and API data: JSON to CSV

When your JSON is primarily a list of records for spreadsheets or BI tools rather than nested config, the JSON to CSV converter may be a better fit than YAML. CSV preserves row semantics; YAML preserves hierarchical structure.

Privacy and security notes

Because conversion executes locally in the browser, you reduce the risk of leaking tokens compared to sending config to a third-party API. You should still treat any textarea as sensitive: clear it when you are done, avoid screen sharing secrets, and prefer redacted samples when asking teammates for help.

Related developer tools

Explore the full code and developer tools section on the homepage, or open one of the utilities below.

  • JSON Formatter & Validator — Format, validate, minify, and explore JSON in a collapsible tree—fix payloads before they hit production.
  • JSON to CSV Converter — Turn JSON arrays into downloadable CSV with automatic column detection for spreadsheets and BI tools.
  • CSV to JSON Converter — Paste or upload CSV and get structured JSON with header-aware typing for APIs and apps.
  • YAML to JSON Converter — Parse YAML to valid JSON with clear errors—ideal for CI configs and cloud templates.
  • XML Formatter & Validator — Beautify and validate XML with structure insight and actionable parse errors.
  • Regex Tester & Debugger — Test patterns live with highlights, capture groups, and flags—debug regex without leaving the browser.
  • SQL Formatter — Pretty-print SQL with indentation and keyword casing for readable queries and code review.
  • HTML Formatter & Minifier — Beautify or minify HTML and compare raw markup with a quick rendered preview.
  • CSS Formatter & Minifier — Format messy stylesheets or minify CSS for faster loads—keep design tokens consistent.
  • JavaScript Formatter & Minifier — Pretty-print or minify JavaScript for debugging locally and shipping smaller bundles.
  • HTML to Markdown Converter — Convert HTML snippets to Markdown for docs, CMS migrations, and README cleanup.
  • Markdown to HTML Converter — Turn Markdown into HTML with a live preview—handy for emails, blogs, and static pages.
  • Code Diff Checker — Compare two code blocks side by side with clear add/remove highlighting for reviews.
  • JWT Decoder — Decode JWT header and payload and check expiry—signature verification not included, client-side safe.

Frequently asked questions

What does this JSON to YAML converter do?
You paste or type JSON (objects, arrays, strings, numbers, booleans, and null). The tool parses it in your browser and prints equivalent YAML—handy for Kubernetes manifests, Docker Compose, Ansible, GitHub Actions snippets, and any config that reads YAML while your source of truth is still JSON.
Is my JSON sent to a server?
No. Parsing and YAML generation run entirely in your browser with JavaScript. Nothing is uploaded for conversion, which keeps API payloads, secrets in test fixtures, and internal configs off the wire—always double-check before pasting real production secrets anywhere.
How is JSON different from YAML?
JSON is a strict, minimal data format with mandatory quotes and braces. YAML is a superset-style, indentation-based format that often reads like an outline. Many tools accept both; some (older CLIs, certain CI parsers) prefer YAML for multiline strings and comments—this converter helps you bridge from JSON to that style.
Can I use this for Kubernetes or Helm?
Yes, when your starting point is JSON—such as exported API objects or generated config—you can convert to YAML for readability or to match examples in the Kubernetes docs. After converting, validate with kubectl dry-run or your cluster’s admission rules, and prefer the reverse path (YAML to JSON) with our YAML to JSON converter when APIs expect JSON.
Why does my conversion fail with a parse error?
The input must be valid JSON: double-quoted keys and strings, no trailing commas, no comments, and no single-quoted strings. If you have JSON with comments or trailing commas, use our JSON formatter and validator first to clean the payload, or remove comments manually—JSON does not allow them.
Does YAML support comments if I convert from JSON?
JSON has no comments, so the converter cannot invent them. The output is pure structure. Add your own # comments in the YAML editor after conversion if your pipeline allows them.
What does “sort keys” change in the output?
Alphabetical sorting makes diffs more stable when you compare files in Git—useful for generated configs. Turn it off when you want key order to match the original JSON object insertion order (as far as the engine preserves it).
How do I get back from YAML to JSON?
Use our dedicated YAML to JSON converter on this site for the opposite direction, with parse errors surfaced in plain language for broken indentation or tabs.
Can I download the YAML file?
Yes. After a successful conversion, use Download to save a .yaml file, or Copy to place the text on the clipboard for editors and tickets.