TOML formatter & validator
Paste TOML, validate as you type, then Format to pretty-print with the bundled serializer. Parse errors include row, column, and a snippet. Copy or download formatted.toml. Runs only in this tab.
Frequently asked questions
No. TOML text is never uploaded for parsing. Nothing is sent to LocalTools servers for processing.
Yes; parse failures include row/column details when the parser supplies them.
Related guides
- What is TOML?A plain-language introduction to TOML for config and metadata, how it differs from JSON and YAML, and how to validate it locally in your browser.
- JSON vs YAML for configWhen YAML shines for human-edited config, when JSON is the safer default, and how to convert between them locally in your browser.