Convert XLSX to TOML Online Free
Convert Excel spreadsheet rows to TOML format. Each row becomes a TOML table entry with column headers as keys — perfect for generating Cargo.toml data sections, pyproject.toml entries, or Hugo content from spreadsheets.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile converts your Excel spreadsheet to TOML on our server. Column headers become TOML keys and each row becomes a TOML table in an array of tables. Free, no signup required, your file is deleted immediately after conversion.
Convert XLSX to TOML
Drop your XLSX file here to convert it instantly
Drag & drop your .xlsx file here, or click to browse
Convert to TOML instantly
XLSX vs TOML: Format Comparison
Key differences between the two formats
| Feature | XLSX | TOML |
|---|---|---|
| Format type | Binary spreadsheet (ZIP of XML) | Plain text, key-value with sections |
| Readability | Requires spreadsheet application | Clean, human-readable config syntax |
| Config file use | Not suitable | Standard for Rust (Cargo), Python (pyproject), Hugo |
| Typing | Excel cell types | Explicit: string, integer, float, boolean, datetime |
| Comments | Cell notes only | Native # comments supported |
| Nesting | Flat rows and columns | Nested tables and arrays of tables |
| Ecosystem | Office tools | Rust, Python, Go, Ruby toolchains |
When to Convert
Common scenarios where this conversion is useful
Rust Cargo configuration data
Convert package dependency spreadsheets or metadata tables to TOML for use in Cargo.toml. Rows map directly to TOML array-of-tables entries.
Hugo static site content
Transform content planning spreadsheets into Hugo front matter TOML. Each spreadsheet row becomes a page's front matter fields.
Python pyproject.toml sections
Generate tool configuration sections for pyproject.toml from spreadsheet settings tables. Useful when managing large numbers of linter rules or tool options.
Application config generation
Convert settings spreadsheets maintained by non-technical stakeholders to TOML config files for deployment. Bridge the gap between Excel-based planning and TOML-based configuration.
How to Convert XLSX to TOML
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1
Upload your Excel file
Drag and drop your .xlsx file or click to browse. The first sheet in the workbook is used.
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2
Server converts to TOML
The file is sent securely to our server. SheetJS reads the rows and the TOML library writes each row as a TOML table entry. Deleted immediately after.
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3
Download the TOML result
Click Download to save your .toml file. The output uses TOML array-of-tables syntax (double brackets) for each row.
Frequently Asked Questions
The output uses TOML's array-of-tables syntax ([[section]]). Each spreadsheet row becomes one table entry in the array. Column headers are the keys within each table.
Yes. Numeric cells become TOML integers or floats. Boolean cells (TRUE/FALSE) become TOML booleans. Text cells become TOML strings in double quotes.
TOML supports strings, integers, floats, booleans, and datetimes. Excel dates are converted to TOML datetime or date literals. Formulas are resolved to their computed values.
The first (leftmost) sheet in the workbook is used. Move your target sheet to the first position in Excel before uploading.
Empty cells are omitted from each TOML table. Only cells with values generate key-value pairs, keeping the output clean.
The converted TOML is syntactically valid but structured as a generic array of tables. For Cargo.toml, you may need to adjust the section names to match expected keys like [dependencies] or [[package.metadata.something]].
TOML works well for configuration tables with a fixed schema. For large datasets or pure tabular data, JSON or CSV may be more practical. TOML shines for configuration use cases.
Yes. Your file is uploaded over encrypted HTTPS, converted, and deleted from our servers immediately after you download the result. Nothing is stored.
The upload limit is 50 MB. Most Excel files are well within this limit.
Yes. Use the ODS to TOML or XLS converters for other spreadsheet formats. All produce the same TOML array-of-tables structure.
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Need to convert programmatically?
Use the ChangeThisFile API to convert XLSX to TOML in your app. No rate limits, up to 500MB files, simple REST endpoint.
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