Santekno/tools

TOML Formatter & Validator

Format, validate, and convert TOML configuration files to JSON.

Processed in your browserUpdated · Jan 2026
Input
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Output
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How to use TOML Formatter & Validator

Paste your input on the left, choose the options you want, and the output appears instantly on the right. Everything runs in your browser — none of your data is sent to a server.

  • Paste or type your input in the INPUT panel
  • The output regenerates automatically as you type
  • Use Copy to put the result in your clipboard
  • Click Sample to load a working example

What is TOML Formatter & Validator?

TOML (Tom's Obvious, Minimal Language) is a config-file format popular with Rust (Cargo.toml), Python (pyproject.toml), and Hugo. This tool validates TOML syntax and pretty-prints or converts to JSON. All processing in your browser. This tool is part of santekno's developer toolbox — a curated collection of utilities built for engineers who care about speed, privacy, and simplicity.

Common use cases

  • Debugging API payloads and integration issues
  • Inspecting tokens, hashes, or encoded strings during development
  • Generating fixtures and sample data for tests
  • Sharing readable output with teammates in code reviews

FAQ

TOML is commonly used in Rust (Cargo.toml), Python (pyproject.toml), Hugo (config.toml), and various other modern tools.

TOML uses explicit syntax (no significant whitespace), making it less error-prone than YAML for config files.

Yes — toggle "Convert to JSON" to output the parsed structure as JSON.

Yes, full TOML 1.0 spec support including dates, arrays of tables, and inline tables.

No. Parsing happens entirely in your browser.