JSON to YAML Converter

Paste JSON and get tidy YAML output instantly.

Processed locally — nothing is uploaded

Input

Output

About Code Formatter

Useful for making a minified payload readable again, for checking that a config parses before you ship it, or for stripping a file down for production. Switching language keeps whatever you have already pasted.

Turn a block of JSON into tidy, human-readable YAML with proper indentation — useful for Kubernetes manifests, CI configs and other YAML-first workflows. The conversion runs entirely client-side.

Paste messy or minified code and instantly beautify, minify or validate JSON, HTML, CSS, SQL, XML and YAML. Beautifying re-indents your source with consistent spacing so it is easy to read and review; minifying strips whitespace and comments to ship smaller files; validating surfaces syntax errors with the exact location so you can fix them fast.

It also doubles as a converter between common data formats — JSON to CSV, CSV to JSON, YAML to JSON and back — which is handy when wiring up APIs, configs or spreadsheets. Converting is where structure mismatches surface: CSV has no nesting, so a nested JSON object has to be flattened or dropped.

Learn how this works

A Practical Guide to Everyday Developer Encoding & FormattingHow and when to use Base64, JSON formatting, hashing, JWTs, regex and cron — with free in-browser tools for each task.11 min read

Frequently asked questions

Why convert JSON to YAML at all?

YAML supports comments and needs far less punctuation, which makes it easier to review in a pull request. That is why Kubernetes manifests, GitHub Actions workflows and most CI configs are YAML-first even though the underlying data model is the same.

How are long strings and special characters handled?

Values that would be ambiguous in YAML — ones starting with a special character, or that could be read as a boolean or number — are quoted so they survive a round trip. Multi-line strings are emitted in a block form that preserves their line breaks.

Can I convert it back later without losing anything?

Yes for the data itself: JSON and YAML describe the same structures, so a round trip preserves keys, values and nesting. What a round trip cannot restore are comments, since JSON has nowhere to keep them.

Pro Tips

→Paste unformatted JSON, HTML, CSS, or SQL code and apply consistent indentation (2, 4, or tab spaces) in one click.
→Use minification toggle to reduce code size by 30-50% for production deployment or email constraints.
→Export formatted code directly to clipboard to paste into documentation, emails, or config files instantly.
→Compare formatted vs minified side-by-side to verify code compression doesn't break syntax.

Common Use Cases

•Turning an API's JSON example into a Kubernetes manifest or Helm values file
•Converting a JSON config into a commentable YAML file for a CI pipeline
•Making a deeply nested JSON payload readable enough to review by eye

How It Compares

While Prettier and VS Code extensions require installation and configuration, our web-based formatter works instantly on any device without setup, offering broader language support (HTML, CSS, SQL) in a single tool compared to language-specific formatters like Beautifier.io.

More Code Formatter tools

Code Formatter JSON to CSV Converter CSV to JSON Converter CSS Minifier JavaScript Unminifier SQL Prettifier XML Beautifier YAML to JSON Converter Validate JSON Online Validate JavaScript Syntax