Your files stay on your device

YAML formatter, validator, converter

Check YAML with positioned errors, reformat it, or walk it to and from JSON through the shared interchange model: anchors resolved away, merge keys expanded, comments counted as dropped, every loss in the report.
ValidateFormatYAML → JSONJSON → YAMLCopyDownloadNothing in yet

Paste, drop, or type to begin. Everything stays on this device.

yaml core schema, anchor cap, duplicate-key errors

Next door in Config

- TOML (/config/toml)
- JSON Converter (/json/convert)
- docker run → compose (/config/docker)
All config tools (/config)

Canonical HTML: https://nutter.tools/config/yaml
Markdown version: https://nutter.tools/config/yaml/index.md
Plain-text version: https://nutter.tools/config/yaml/index.txt
Agent index: https://nutter.tools/llms.txt