TOML Formatter
Reformat TOML input into clean, consistently formatted TOML output, with friendly error messages for invalid syntax.
Raw TOML Input
Formatted TOML
Formatted TOML will appear here...
How to Use the TOML Formatter
Paste any TOML document into the input box. The formatter parses it fully, then re-serializes it with clean, consistent spacing and structure — normalizing indentation, key spacing, and table headers regardless of how inconsistently the original file was written. If your TOML has a syntax error, a friendly error message is shown instead of a crash, so you can fix the issue and keep going.
Example
Cramped input like title="Example"
[owner]
name="Ann" is reformatted with consistent spacing around the equals signs and table headers, producing a clean, readable TOML document with exactly the same data.
Common Use Cases
- Cleaning up a
Cargo.tomlorpyproject.tomlfile with inconsistent formatting. - Normalizing TOML config files before committing them to a shared repository.
- Verifying a TOML document is syntactically valid by checking that it parses and reformats without error.
FAQs
- How is this different from the TOML to JSON or JSON to TOML converters? Our TOML to JSON and JSON to TOML tools convert TOML TO or FROM a completely different format. This TOML Formatter stays within TOML the whole time — it just reformats your TOML input back into clean, consistent TOML output, without ever changing formats.
- Does formatting change the data or key order? No — parsing and re-serializing preserves all keys, values, and their nesting structure exactly. Only whitespace, indentation, and table-header presentation are normalized for consistency.
- Is my TOML uploaded anywhere? No — parsing and formatting happen entirely client-side in your browser. Nothing you paste is sent to a server.