Convert JSON to YAML

Convert JSON to YAML online: paste your data or drop a file and get human-friendly YAML, the format of Kubernetes, Docker Compose, GitHub Actions and many config files instantly. Everything runs in your browser.

Your file never leaves your device.

How to convert JSON to YAML

Developers, analysts and marketers move data between JSON and YAML constantly. This converter parses the JSON with a strict, standards-compliant parser and produces human-friendly YAML, the format of Kubernetes, Docker Compose, GitHub Actions and many config files. You can paste text straight from your editor or clipboard, preview the result and download it, without sending your data to a server.

Step 1: Choose your JSON file
Drop a .json file onto the converter, pick it from your device, or paste the JSON text directly.
Step 2: Check the preview
The YAML output appears immediately so you can verify it before saving.
Step 3: Download the YAML
Save each result individually, or download everything as a single ZIP when you convert several files.

Good to know

An array of objects works best. A single object is treated as one row, and nested objects are flattened with dot notation for tabular outputs.
Numbers and booleans are typed correctly instead of being kept as strings.
Invalid input is reported with a clear error instead of producing a broken file.

Why use this JSON to YAML converter?

Paste text or upload a file, whichever is faster.
Strict parsing with clear error messages.
Standards-compliant YAML output with correct escaping.
Private by design: data never leaves your browser.

Is it free?

Yes. Converting JSON to YAML is free, with no watermark, signup or email required. Local conversions have no artificial file-size or daily cap; the practical limit is your device.

Is my file uploaded?

The JSON file is processed entirely in your browser. It is never uploaded, never stored and never seen by anyone, so this is safe for confidential files.

About the formats

What is JSON?

JSON (JavaScript Object Notation) is a lightweight format for storing and exchanging data as collections of key-value pairs. It grew out of JavaScript but is now supported by nearly every programming language. JSON is the de facto standard for APIs, configuration files and structured data.

Use JSON when machines exchange data, REST APIs, web apps, configuration and tool settings. Its predictable structure makes it easy to parse, so it is the natural choice whenever data needs to be read by software.

JSON (JavaScript Object Notation)

What is YAML?

YAML is a text format for structured data that relies on indentation instead of brackets or tags, which makes it easy to read and write by hand. It supports lists, key-value maps, comments and multi-line strings, and is largely a superset of JSON. It is widely used for configuration in tools such as Docker Compose, Kubernetes and CI pipelines.

Use YAML for configuration files that people edit by hand, where comments and readability matter. Be careful with indentation, since a misplaced space changes the meaning. For data exchanged between programs, JSON is stricter and less error-prone.

YAML (YAML Ain't Markup Language)

Frequently Asked Questions

Is JSON to YAML conversion free?

Yes. It is free, with no watermark, signup or email required. Local conversions have no artificial file-size or daily cap; the practical limit is your device.

Is there a size limit for JSON to YAML?

Local conversions have no fixed file-size cap; the practical limit is your device's available memory. Because everything runs locally, speed depends on your device.

Is it safe to convert json to yaml here?

Yes. The work happens on your own device with WebAssembly and browser APIs, so the file is not uploaded at all. You can even disconnect from the internet once the page has loaded.

Do I need to install anything?

No. Everything runs in a modern browser (Chrome, Edge, Firefox or Safari) on Windows, macOS, Linux, Android and iOS. There is no app, plugin or account.

Can I convert YAML back to JSON?

Yes, there is a dedicated YAML to JSON converter linked in the related tools below. Keep in mind that information dropped in one direction cannot always be restored in the other.

Need the opposite? Convert YAML to JSON

DataProcessed locally