Step 1 / source
Choose the source
Drop one file here
Choose a modern workbook and identify the worksheet tab you need as tab-separated text.
Checking publication status...LOCAL DATA CONVERTER / XLSX TO TSV
Excel to TSV
Export one XLSX worksheet as UTF-8 tab-separated text with quoted tabs and line breaks plus optional spreadsheet-formula protection.
Processed in this browserOne unencrypted .xlsx file up to 15 MB and 50 worksheets. The selected sheet is limited to 50,001 rows, 200 columns, 1,000,000 cells, and 20 MB output.
XLSX - 1,000,000 cells
No file upload
This operation runs with browser APIs. Nirmion receives catalogue requests, not the selected source bytes.
Original stays unchanged
The converter creates a separately named output. It never writes back into the source file.
Bounded work
One unencrypted .xlsx file up to 15 MB and 50 worksheets. The selected sheet is limited to 50,001 rows, 200 columns, 1,000,000 cells, and 20 MB output.
Plain-language method
How worksheet cells become TSV text
Nirmion reads one worksheet in tab order, converts stored scalar or formula-result values to text, protects cells beginning with spreadsheet formula characters when enabled, quotes tabs, quotes, and line breaks, and writes a UTF-8 BOM plus tab-separated rows. Styling and workbook objects are omitted.
- 01Choose a valid source
Use an unencrypted XLSX workbook. Confirm the worksheet number because hidden tabs still participate in workbook order.
- 02Review the conversion choices
Formula protection prefixes risky text cells for safer spreadsheet reopening. Disable it only when a trusted downstream system requires exact leading characters.
- 03Inspect the separate result
The file is named from the selected worksheet and ends in _nirmion_tools.tsv. It contains values only, without colours, formulas, charts, or images.
Useful when
Practical jobs this tool handles
- Export a worksheet for a tab-delimited import.
- Move reviewed data into a text-based pipeline.
- Create a diff-friendly table from workbook values.
Before converting
Inspect the selected sheet
- Verify the one-based worksheet number.
- Keep formula protection enabled for untrusted text.
- Check stored formula results and date formatting in the output.
Know the boundary
TSV cannot preserve workbook features
Formulas, styles, comments, merged cells, charts, and multiple worksheets are not represented. Formula cells contribute only their stored result when one exists.
Quick answers
Questions before you convert
The output is a value table, not a workbook copy.
Are formulas included?
No. Only a stored result is exported; formulas are never recalculated or copied.
Why are some cells prefixed with an apostrophe?
Formula protection neutralizes text that spreadsheet software may otherwise execute as a formula.
Can I export every sheet?
Use one sheet at a time so the TSV filename and table contract stay explicit.