Plain-text files and table design

Convert CSV to TXT in Windows 10 Without Changing the Data

Make a text copy of CSV in Windows 10 while preserving bytes, then distinguish an extension change from delimiter conversion and spreadsheet import settings.

By Uddhav Gopani, FounderPublished 27 September 2026Updated 29 September 2026

Convert CSV to TXT in Windows 10 Without Changing the Data

To make a TXT version of a CSV in Windows 10, copy the file and change the copy’s extension to .txt if the recipient accepts the same comma-separated contents. CSV is already text. If the recipient expects tabs, fixed-width fields or a special layout, changing the extension is only a naming change and will not create that required format.

Identify what the receiving program means by TXT

Ask whether the program wants the original CSV syntax under a different name or a genuinely different record layout. These requests can sound similar but require different actions. A .txt file containing commas is appropriate for one importer and incorrect for another that expects tab separators.

Keep the source CSV unchanged while resolving that requirement. Opening and resaving it in a spreadsheet can introduce changes to identifiers, dates or number representations before the extension is even changed. A direct file copy avoids that unnecessary interpretation step.

Make the full extension visible

In Windows 10 File Explorer, open the View options and turn off Hide extensions for known file types in Folder Options. Microsoft’s File Explorer guide includes the Windows 10 sequence. You should be able to distinguish table.csv from table.csv.txt by the full name.

Copy the source into the intended destination folder, give the copy a distinct name and replace its final .csv extension with .txt. Read the extension-change confirmation and confirm only when this matches the required naming change. Preserve the original file so that the copy can be compared against it.

Use a byte-preserving local copy when preferred

The following PowerShell example assumes that you have opened PowerShell in a folder containing table.csv. It creates table.txt beside it and refuses to overwrite an existing destination. It does not parse the CSV or change its encoding.

$csvSource = Join-Path (Get-Location) 'table.csv'
$textDestination = Join-Path (Get-Location) 'table.txt'
[System.IO.File]::Copy($csvSource, $textDestination, $false)

The File.Copy documentation defines the final false argument as disallowing replacement. If table.txt already exists, select a new destination name or inspect that file before deciding what to do with it. An error should not be treated as evidence that a new output was created.

Inspect the text without changing its meaning

Open the new file in a text editor and compare the expected records. This fictional CSV contains a leading-zero identifier, an accented name, a comma inside a field and escaped quotation marks:

ID,Name,Note
00123,René,"North, east"
00999,Asha,"Says ""ready"""

The quotation marks around North, east group one field; they are not decoration that should be removed. The doubled quotation marks around ready encode literal quotation marks within the note. Those characters should remain exactly the same in a byte-preserving TXT copy.

If you see unusual characters instead of René, check the editor’s decoding and the source encoding. The copy operation itself does not translate bytes. Saving the displayed garbled text could introduce a new problem, so return to the original and identify the correct encoding before making a deliberate text conversion.

Convert separators only when required

If the destination requires tabs, use a CSV-aware parser to read each record and a writer configured for that destination. Do not replace every comma with a tab, because the comma inside North, east belongs to the note. A quoted field can also contain a line break that must be handled as part of the value.

For a destination that accepts comma-delimited text, see the comma-text conversion guide. It distinguishes a simple copy from a normalization step. Choose based on the recipient’s actual format, not the icon shown beside the file.

Verify the copy and the import separately

For a pure copy, compare file bytes or a cryptographic hash to confirm that the content stayed unchanged. Matching bytes establish the copy operation, while a sample import establishes the recipient’s interpretation. These are different checks, and a passing copy check does not guarantee an importer will recognize the delimiter.

Inspect two distinct imported records, including the leading-zero identifier. Configure that field as text if the receiving application otherwise converts it into a number. Retain the original CSV and the verified TXT copy with clear names so that later troubleshooting starts from the exact file supplied.