100tools
Text & Data

YAML Formatter

Format and validate YAML locally without uploading.

Related Tools

JSON FormatterFormat, minify, and validate JSON in the browser.Text & DataJSON ↔ YAML ConverterConvert between JSON and YAML formats instantly.Text & Data

Frequently Asked Questions

Does my YAML leave the browser?

No. Formatting and validation run entirely in your browser. Your data is never sent to any server.

What does the formatter change?

It normalizes indentation to 2 spaces, removes trailing whitespace, and ensures consistent quoting. The semantic content of the YAML is preserved.

Why does my YAML fail validation?

Common causes include inconsistent indentation (mixing tabs and spaces), duplicate keys, or special characters in unquoted strings. The error message shows the line number to help you locate the issue.