Beautify, minify and validate YAML, with YAML ↔ JSON conversion
The YAML Formatter is a practical tool built for developers to format, minify, validate and convert YAML data. Whether you're writing config files, working with Docker Compose, or converting between YAML and JSON, this tool helps you get the job done faster.
It supports syntax highlighting, automatic indentation and error hints, so your YAML stays clean and readable. It also offers a minify feature that strips unnecessary spaces and line breaks to shrink your YAML payloads.
The tool also includes YAML/JSON conversion — quickly turn YAML into JSON or the other way around. Everything runs locally in your browser; your data is never uploaded.
Formatted YAML has a clear structure that's easy to read and understand, especially with deeply nested data.
Quickly spot YAML syntax errors with detailed messages to help you locate and fix issues fast.
Convert between YAML and JSON to meet different data-format needs and boost your productivity.
Automatically indents and formats YAML with customizable indentation for better readability.
Removes all unnecessary spaces and line breaks to produce a compact YAML string.
Two-way conversion between YAML and JSON for different data-format needs.
Validates YAML syntax and reports detailed errors and locations to help you fix problems quickly.
Colors different parts of the YAML so the structure is clear at a glance.
Everything runs locally in your browser; your data is never uploaded.
New to YAML? Read our guide on how to format and validate YAML — the most common mistakes, the yes/no boolean trap, and converting YAML to JSON.
It beautifies messy YAML with proper indentation, validates the syntax, and can minify it into a compact single form.
YAML uses indentation instead of brackets to define structure, so a single wrong space can break the whole document. The formatter fixes spacing so your YAML is valid and readable.
Yes. The tool converts YAML to JSON and back, which is handy when sharing data with systems that expect JSON.
No. Formatting and validation run locally in your browser, so configuration files 鈥?and any secrets inside them 鈥?stay on your machine.