LOCAL DATA CONVERTER / TSV TO CSV

TSV to CSV

Turn a UTF-8 tab-separated table into RFC 4180-style comma-separated text with safe quoting and optional formula protection.

Processed in this browserOne UTF-8 .tsv or .tab file up to 5 MB, 50,000 data rows, 200 columns, 1,000,000 cells, and 20 MB output.

Step 1 / source

Choose the source

TSV - 1,000,000 cells

Drop one file here

Choose the header-based tsv table you want to turn into utf-8 csv table.

Browse filesChecking publication status...

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 UTF-8 .tsv or .tab file up to 5 MB, 50,000 data rows, 200 columns, 1,000,000 cells, and 20 MB output.

Plain-language method

How TSV to CSV works

The browser parses quoted tabs and line breaks, checks every row has the same number of cells, preserves source order, quotes CSV-sensitive values, and writes comma-separated UTF-8 text with a byte-order mark.

01
Choose a valid source
Use literal tab characters between fields, not groups of spaces. The first row must identify the columns.
02
Review the conversion choices
Formula protection is recommended when people will open the CSV in Excel or another spreadsheet application.
03
Inspect the separate result
The result ends in _nirmion_tools.csv and contains one comma-separated table with the same bounded rows and columns.

WORKED EXAMPLE / REVIEW BEFORE RELYING

TSV to CSV: a small review pass

Use a short, non-sensitive sample first. This example shows the checkpoints to apply before moving an authorised dataset into the destination workflow.

TSV
Source
Choose sample.tsv with a header and two representative, non-sensitive records.
Review the conversion choices
Keep the documented defaults, convert once, and compare the preview or result count with the TSV sample.
CSV
Result
Open the separate CSV download and verify two records, field names, nulls, encoding, and destination compatibility.

Useful when

Practical jobs this tool handles

Open a TSV export in CSV-oriented software.
Prepare tabular data for a comma-delimited import.
Create a portable attachment from a tab-delimited report.

Before converting

Check the source and destination rules

Confirm tabs are real separators.
Inspect values containing commas or line breaks.
Review formula-like text before disabling protection.

Know the boundary

Know what the destination format cannot keep

CSV has no worksheet formatting or type metadata. Regional applications may expect semicolons instead of commas; this route intentionally produces comma-separated output.

Quick answers

Questions before you convert

The conversion contract is deliberately explicit.

Will cells containing commas break?

No. Those cells are quoted and embedded quotes are doubled.

Does it change line order?

No. Rows and columns remain in source order.

Can I use a space-delimited file?

No. Rename or convert spaces to real tabs first.