JSON & YAML Linter — Online Formatter — desktop.engineer
Validate, lint and format JSON and YAML online with clean indentation and precise syntax errors.
Online JSON linter and YAML linter
Validate, lint and format JSON and YAML files directly in the browser. This online linter reports the exact line of syntax errors and outputs clean, properly indented code.
- JSON linter: paste your JSON, get validated, formatted output with 2-space indentation and a precise error location.
- YAML linter: powered by js-yaml, it detects indentation and syntax errors in YAML files (docker-compose, configuration, CI pipelines).
- Formatter: every valid document is normalized with consistent indentation, ready to copy.
A fast, free online linter for developers — nothing is uploaded, your data never leaves the browser.
All tools