Developer
YAML Formatter and Validator
- Browser-based
- No signup
Paste YAML to validate it and format with indentation, or minify into a compact document. Errors report line and column when available.
100% Client-Side
Your data never leaves your computer.
How to use this tool
1. Paste YAML into the YAML Formatter input panel. 2. Choose indent size or minify options if shown. 3. Click Format or read live output. 4. Fix any syntax errors reported before copying. 5. Copy the formatted YAML for configs or CI files. Processing runs in your browser.
Worked example
Example: paste a compact deployment YAML with inconsistent spacing and format it to 2-space indent for review in a pull request.
How it works
Paste YAML to validate it and format with indentation, or minify into a compact document. Errors report line and column when available.
Limitations
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
Privacy and file handling
Your data is processed in your browser and is not uploaded to our server.
Frequently asked questions
Does it validate YAML?
Yes. Invalid YAML shows a parse error with line and column when available.
Is my YAML stored?
No. Formatting runs locally in your browser.
Is YAML Formatter and Validator free to use?
Yes. Utilnivo tools are free to use and do not require an account.
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