Free online TEXT to ASCII converter

Legacy programs, terminals, embedded devices, and data-import tools may accept only 7-bit ASCII and reject UTF-8 or other encodings. Converting a plain-text file to ASCII produces a file with compatible bytes, but characters outside the ASCII set must be removed, replaced, or transliterated.

What the TEXT format is

In the Text files category, TEXT usually means an unformatted plain-text file saved with an extension such as .txt or .text. It contains characters, line breaks, and sometimes tabs, but no fonts, images, page layout, embedded objects, or document styling. Text editors, programming tools, terminals, export utilities, and operating systems create and use these files.

The extension does not identify the character encoding. A TEXT file may contain ASCII, UTF-8, Windows-1252, ISO-8859-1, or another encoding. Identify the source encoding before conversion; treating a Windows-1252 or UTF-16 file as UTF-8 can corrupt its content.

What the ASCII format is

ASCII is a 7-bit character encoding, not a separate document structure. It defines 128 values, including control characters and printable English letters, digits, punctuation, and symbols. A conventional ASCII text file uses bytes from 0x00 through 0x7F; ordinary files normally contain printable characters, tabs, and line-ending characters.

ASCII remains useful for command-line tools, firmware, industrial equipment, older terminals, data-import interfaces, and systems that cannot decode Unicode. Its restricted character set makes byte-level compatibility predictable, but it cannot directly represent accented letters, non-Latin scripts, typographic quotation marks, emoji, or most other Unicode characters. ASCII-compatible UTF-8 is not the same as ASCII: UTF-8 can contain multibyte bytes above 0x7F.

How to convert a TEXT file to ASCII

Using 101convert.com:

1. Open the TEXT-to-ASCII converter on 101convert.com.
2. Upload the plain-text file and select ASCII as the output format.
3. Start the conversion and download the result.
4. Open the output in a text editor and check non-ASCII characters, line endings, and important values.

The conversion is free and requires no installed software. Do not upload confidential or regulated content unless the service's handling and retention terms are acceptable.

Using GNU/Linux or macOS: The iconv utility converts between named encodings. For a UTF-8 source, use:

iconv -f UTF-8 -t ASCII input.txt -o output.txt

This normally reports or rejects characters that cannot be represented. To request approximate replacements, use:

iconv -f UTF-8 -t ASCII//TRANSLIT input.txt -o output.txt

Transliteration behavior depends on the operating system and locale. Replace UTF-8 with the actual source encoding, such as WINDOWS-1252, when known.

Using Windows PowerShell: This example reads a text file and writes 7-bit ASCII:

$text = [IO.File]::ReadAllText('input.txt')
[IO.File]::WriteAllText('output.txt', $text, [Text.Encoding]::ASCII)

.NET's ASCII encoder replaces unsupported characters with ? by default, so inspect the result. The source-reading method must match the file's actual encoding; automatic detection is reliable mainly when a Unicode byte-order mark is present.

A text editor with an explicit encoding choice can also perform the conversion: open the file, choose Save As or Save with encoding, select US-ASCII or ASCII, and save a new file. Use a dedicated text editor rather than a word processor when tabs, spacing, or line structure must remain unchanged. Modern Notepad versions commonly offer UTF-8 and Unicode encodings but may not provide a true ASCII-only option.

Compatibility and quality checks

Characters outside ASCII require a deliberate policy. Transliteration may turn é into e; replacement may produce ?; deletion removes information; retaining UTF-8 preserves the original text but fails an ASCII-only requirement. Check names, identifiers, source code, measurements, and filenames after conversion because one changed character can alter meaning or syntax.

Encoding conversion does not preserve document formatting. Colors, images, tables, page layout, metadata, and other styling have no representation in an ASCII text file. A plain-text source already lacks most of these features, but any structure represented through special Unicode characters may also be lost.

Check line endings separately when the receiving system requires them. Unix-like systems generally use LF; many Windows programs use CRLF. The ASCII character set permits both conventions, so selecting ASCII alone does not guarantee the required line-ending style.