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TOML Formatter and Beautifier

Normalize spacing, blank lines, comments, and sections in TOML without changing key or value semantics. Processing runs locally.

Quick switch→TOML to JSON
TOMLFormatter
Quick switch:TOML to JSONJSON to TOMLYAML Validator

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Use cases

  • Clean up spacing in Cargo.toml
  • Keep pyproject.toml formatting consistent
  • Beautify a TOML snippet before committing it

How to use

  1. Paste TOML content
  2. Review the formatted result
  3. Copy the output

Example input and output

Input

[package]
name="app"
version  ="1.0"

Output

[package]
name = "app"
version = "1.0"

FAQ

Does formatting change configuration behavior?

No. It only adjusts layout such as spaces and blank lines without changing keys or values.

Can it format invalid TOML?

The current formatter is lightweight. Always validate important configuration separately after formatting.

Tools

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TOML to JSON

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Convert TOML to formatted JSON in your browser. Parse failures show the reason, and conversion stays local—useful for debugging config and handing data to JSON-only tools.

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JSON to TOML

Convert JSON to TOML Online

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Convert JSON to TOML in your browser. Invalid JSON shows an error, and conversion stays on the page—useful for Cargo, pyproject, and other TOML-first config workflows.

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YAML Validator

Validate YAML Syntax Online

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Validate YAML syntax in your browser, inspect structure details such as indentation and node counts, and review parse errors with location hints. Processing stays local—useful for config and CI file checks.

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