Open YAML Files Online
YAML is an indentation-based data format that is easy to read and write by hand. Docker Compose, Kubernetes, GitHub Actions and many app settings are written in it.
YAML Ain't Markup Language · .yaml, .yml
What you see in the YAML viewer
- Indentation and syntax errors pinned to the line
- Multi-document files split at ---
- A tree view of maps and lists
- Copy the data as JSON
Other ways to open YAML files
Windows
VS Code or Notepad++ show YAML with syntax highlighting.
macOS
VS Code, BBEdit or TextEdit open it as text.
Phone & tablet
A browser-based viewer like this one is the simplest option.
Frequently asked questions
Is my YAML file uploaded?
No. The file is read by your browser and shown on your own device. Nothing is sent to a server, and it is gone when you close the tab.
How do I open a YAML file without installing software?
Drop the .yaml, .yml file on this page. It opens straight away in the YAML Viewer & Validator, on Windows, macOS, Linux, Android and iPhone alike.
What if my YAML file doesn't open?
The viewer checks the file's content, not just its name. If it is damaged or not really a YAML file, you'll see an error or can switch to the hex view to look at the raw bytes.
Can I convert YAML to another format?
Yes. The free file converter turns YAML files into other formats in your browser as well, without uploading them.