YAML Editor Online

Edit and format YAML source with syntax highlighting and local downloads. Source code is not executed. Free yaml editor online, with no installation or account.

Tool capabilities

Input: YAML
Output: YAML
File formats: .yaml · .yml

File viewers and editors

How to use YAML Editor

Edit and format YAML source with syntax highlighting and local downloads. Source code is not executed. This yaml editor 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 Editor · 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 Editor