YAML Formatter
Paste YAML to normalise indentation and spot syntax errors before they break a deployment. Works well for Kubernetes manifests, Compose files and CI pipelines.
Loading the YAML Formatter…
How to use the YAML Formatter
- Paste your YAML into the input panel, drop a file onto it, or load the sample.
- The formatted result appears on the right as you type. Change the indent size at any time.
- Copy the result or download it as a file. Press Ctrl/⌘ + Enter to format immediately.
Features
- Normalises indentation and quoting
- Reports YAML syntax errors with line numbers
- Handles multi-line strings, anchors and nested lists
- Formats as you type
- Copy, download and drag-and-drop file support
- Remembers your last input on this device
- Light and dark themes
Frequently asked questions
Will formatting change my YAML values?
No. The document is parsed and written back with consistent indentation; the data stays the same. Comments are not preserved, so keep a copy if you rely on them.
Is my data uploaded to a server?
No. Everything runs locally in your browser. Your input never leaves your device, so it is safe to use with private or proprietary data.
Is Formatter free?
Yes. Every tool is free to use with no sign-up and no limits. A few ads around the tools keep the site running; they never appear inside the editors.