Free TOML to CSV Converter Online
Convert TOML config tables to CSV rows instantly in your browser — no server, no signup.
TOML Input
CSV Output
What Is TOML to CSV?
You've got a Cargo.toml with a list of dependencies or a pyproject.toml with package metadata — and you need that data in a spreadsheet. TOML (Tom's Obvious Minimal Language) is structured; CSV (RFC 4180) is flat rows and columns. This tool reads your TOML per the TOML 1.0 spec and outputs RFC 4180-compliant CSV where each TOML table entry becomes a row and each key becomes a column header — ready to open in Google Sheets or Excel.
This tool runs entirely in your browser. Nothing is sent to a server. Paste TOML or upload a file; get CSV output. For JSON or YAML output, use TOML to JSON or TOML to YAML. For formatting TOML first, use TOML Formatter.
When TOML to CSV Helps
When migrating Cargo or Poetry config to spreadsheets, or feeding tabular data to CSV-based tools, convert here. TOML tables become rows; keys become columns.
TOML to CSV Examples
Convert TOML to CSV. Telecom-themed example:
Example: Subscriber config
CSV output:
Click the Sample button above to load more examples into the editor.
How to Use This Tool
Paste or Upload
Paste TOML into the left panel or upload a .toml or .txt file. Use Sample to load example config. Use Clear to reset.
View CSV Output
The right panel shows converted CSV. TOML tables are flattened to rows. Invalid TOML will show an error.
Copy or Download
Use Copy or Download to get the CSV. For CSV to JSON, use CSV to JSON. For JSON to TOML, use JSON to TOML.
When TOML to CSV Helps
When exporting config data to spreadsheets, reports, or tabular tools, convert TOML to CSV. Great for Cargo.toml dependencies, pyproject.toml sections, or any tabular TOML. For hierarchical output, use TOML to JSON or TOML to YAML.
Frequently Asked Questions
Is my TOML data sent to a server?
No — conversion runs entirely in your browser using JavaScript. Nothing is sent to any server. Open your browser's Network tab while converting to verify.
How are nested TOML tables handled?
Nested TOML tables are flattened to CSV. Nested keys are typically joined with a dot separator (e.g. database.host). Check the output for your specific structure.
Are TOML arrays supported?
Arrays of tables (defined with [[table]] in TOML) each become a CSV row. Inline arrays may become a single cell. Check the output for your use case.
When should I use CSV vs JSON vs YAML for TOML output?
CSV is ideal for flat, tabular data you need to open in a spreadsheet. JSON and YAML preserve the full hierarchy — better for APIs and config tools. Use CSV when you need to analyze or share the data in a spreadsheet.
Can I convert CSV back to TOML?
This tool converts TOML to CSV. For the reverse, use CSV to JSON, then JSON to TOML as a two-step conversion.