Online YAML & TOML Validator
Validate and format YAML and TOML files. Detailed error messages with line numbers.
You use this tool often? Pro includes files up to 500 MB and priority processing.
What is YAML / TOML Validator?
The YAML/TOML validator checks the syntax of your configuration files and displays errors with line numbers.
How to use this tool?
Paste your YAML or TOML, or import a file. The tool validates syntax and shows detailed errors or confirms validity.
Benefits
- YAML and TOML supported
- Errors with line numbers
- Automatic formatting
- 100% browser-based
Frequently Asked Questions
- What formats are supported?
- YAML (via js-yaml) and TOML. The format is detected automatically or manually selectable.
- Are errors detailed?
- Yes, each error includes line number, error type and an explanatory message.
- Can I format the file?
- Yes, if the file is valid, you can get a formatted/indented version.
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Use →What is YAML / TOML Validator?
The YAML/TOML validator checks the syntax of your configuration files and displays errors with line numbers.
How to use this tool?
Paste your YAML or TOML, or import a file. The tool validates syntax and shows detailed errors or confirms validity.
Benefits
- YAML and TOML supported
- Errors with line numbers
- Automatic formatting
- 100% browser-based
Frequently Asked Questions
- What formats are supported?
- YAML (via js-yaml) and TOML. The format is detected automatically or manually selectable.
- Are errors detailed?
- Yes, each error includes line number, error type and an explanatory message.
- Can I format the file?
- Yes, if the file is valid, you can get a formatted/indented version.
Similar Tools
JSON Formatter
Validate, format, and minify JSON. Syntax highlighting and file import. 100% in the browser.
Use →YAML ↔ JSON Converter
Convert between YAML and JSON instantly. Validation, formatting, and one-click copy. 100% browser-based, free.
Use →.env File Generator
Create .env files visually with random secret generation. Export and copy in one click.
Use →