What TOML structures are supported?

The tool targets the first top-level key whose value is an array of tables (i.e., [[table]] syntax or a key whose value is an array of objects). Nested objects are JSON-stringified into a single CSV cell.

Does my data get uploaded anywhere?

No. All parsing and conversion runs entirely inside your browser using JavaScript. Nothing is sent to any server.

What happens if the TOML has multiple arrays?

The tool picks the first top-level key whose value is a non-empty array of objects. You can scroll the preview to verify the correct array was chosen.

How are special characters handled in CSV output?

Any cell value containing a comma, double-quote, or newline is automatically wrapped in double-quotes, and internal double-quotes are escaped as two double-quotes ("") per the RFC 4180 standard.

What if a record is missing a key that other records have?

Missing keys produce an empty cell. The header row is built from all unique keys across every record, so no data is silently dropped.

Can I convert the entire TOML file, not just one array?

Currently the tool focuses on a single array of tables, which is the most common tabular pattern in TOML. Flat key-value pairs at the top level are not rows and cannot meaningfully be expressed as CSV columns.

TOML to CSV Converter

Name: TOML to CSV Converter
Availability: InStock
Author: Nham Vu

Paste TOML with an array of tables and download the result as a CSV file — no server, no upload.

TOML Input

CSV Preview

Paste TOML on the left to see the CSV preview

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Summary

Paste TOML with an array of tables and download the result as a CSV file — no server, no upload.

How it works

Paste your TOML text into the input panel on the left.
The tool automatically detects the first top-level array of tables.
Column headers are derived from the keys of the first record.
A CSV preview is rendered in the output panel with alternating row colors.
Click "Download CSV" to save the file to your computer.
Use "Copy CSV" to copy the raw CSV text to your clipboard.

Use cases

Convert configuration files (e.g., Cargo.toml dependency lists) to spreadsheets.
Export TOML-based dataset files for import into Excel or Google Sheets.
Quickly inspect structured TOML data in a tabular format.
Transform CI/CD pipeline TOML configs into auditable CSV reports.
Migrate data stored in TOML to databases that accept CSV imports.
Preview TOML records without installing any local tooling.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu