YAML Formatter Online

Format YAML syntax and inspect the formatted source locally. Free yaml formatter online, with no installation or account.

Tool capabilities

Input: YAML
Output: YAML

How to use YAML Formatter

Format YAML syntax and inspect the formatted source locally. This yaml formatter works directly in your browser and is free to use without an account.

Paste or open your input in the editor.
Run the tool and inspect the output. If the input is invalid, correct the reported error and run it again.
Copy the result or download it to your device.

YAML Formatter · Example

Input

project: LocalKit
local: true
tools:
  - JSON
  - Markdown

Output

project: LocalKit
local: true
tools:
  - JSON
  - Markdown

Usage notes

Inputs and results are processed on this device. Tool content is not sent to a processing server.

YAML duplicate keys are rejected. Alias expansion is limited; conversions can change comments and presentation.

Text input is limited to 5 MiB and processing runs in a cancellable worker.

YAML Formatter