# YAML Formatter & Validator

> Format and validate YAML — catch the indentation mistakes that break CI pipelines.

To format YAML, paste your document and it is parsed and reprinted with consistent indentation and spacing. Because it parses first, an invalid document fails with the location of the error rather than being silently reindented into something different.

**URL:** https://convertto.tech/t/yaml-formatter
**Category:** Data & Format Tools (https://convertto.tech/c/data-tools)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Enter or paste your yaml.
2. Set the line width.
3. Set the indent size.
4. Turn "Indent with tabs" on or off as needed.
5. The result appears immediately — copy or download it.

## FAQ

### Why does YAML break so easily?

Indentation is structural and tabs are forbidden entirely. A single misaligned space changes which parent a key belongs to, which is why a CI file can parse successfully yet do something completely different from what you intended.

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