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TXT Format — Complete Guide & Converter

Everything you need to know about the TXT file format: technical specifications, use cases, compatibility, and free conversion tools.

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What is a TXT File?

A TXT file is a plain text file: a sequence of characters with no formatting at all. There are no fonts, colors, bold or italic text, images or page layout, just letters, numbers, punctuation, spaces, tabs and line breaks, stored using a character encoding such as UTF-8 (the modern standard), ASCII or a legacy code page. That simplicity is the point. Plain text can be opened by every operating system, text editor, programming language and command-line tool, and it will still be readable in fifty years. It's also tiny: a page of text takes only a few kilobytes. Plain text is the foundation of much of computing: source code, configuration files, logs, CSV data, Markdown, README files and many data exchange formats are plain text, even when they use a different extension.

History of the TXT Format

Plain text is as old as computing itself. ASCII, standardized in 1963, defined 128 characters that became the basis of text files on early computers, with regional extensions and code pages adding accented letters and other scripts in the following decades. The .txt extension became common with MS-DOS and early Windows, where Notepad (introduced with Windows 1.0 in 1985) made it the default format for simple notes. Different systems chose different line endings: CR LF on Windows, LF on Unix and Linux, and CR on classic Mac OS, which is why text files sometimes display oddly on another system. Unicode (1991) and its UTF-8 encoding (1992-1993) solved the problem of mixing languages in one file. UTF-8 now dominates the web and modern software, and even Windows Notepad switched to UTF-8 as its default in 2019.

TXT Technical Specifications

File Extension.txt
MIME Typetext/plain
ContentCharacters only, no formatting
Common EncodingsUTF-8, ASCII, UTF-16, Windows-1252
Line EndingsLF (Linux, macOS), CR LF (Windows)
Typical SizeAbout 2–4 KB per page of text
Best ForNotes, logs, code, data, README files
Opens WithAny text editor or browser

TXT Advantages & Limitations

Advantages

  • ✓Opens in every text editor and operating system
  • ✓Tiny file sizes
  • ✓Future-proof and human-readable
  • ✓Perfect for version control, scripting and data processing
  • ✓No hidden formatting or macros
  • ✓UTF-8 supports virtually every language

Limitations

  • ✗No formatting: no fonts, bold text, headings or images
  • ✗No pages or print layout
  • ✗Encoding mismatches can garble accented characters
  • ✗Different line endings on Windows, macOS and Linux
  • ✗Rarely accepted for formal document submissions
  • ✗Long lines may wrap differently in different editors

Common Use Cases for TXT

Plain text is used for notes and drafts, README files and documentation, source code and scripts, configuration files, server and application logs, data exports (often as CSV or TSV), subtitles (SRT), transcripts and chat exports, and lists of all kinds. Writers use plain text and Markdown for distraction-free drafting, and developers rely on it for everything in version control. When plain text needs to be shared formally, printed or submitted to a system that accepts documents, it's usually converted to PDF, which adds pages, a consistent font and a fixed layout. When formatting is needed, text is pasted into a word processor and saved as DOCX.

Convert TXT to Other Formats

Transform your TXT files to any of the supported target formats below. Each conversion preserves maximum quality and is completely free.

TXT to PDF

TXT vs Related Formats

TXT is the simplest document format: pure characters with no formatting. RTF adds basic formatting in a still-simple format, Markdown adds lightweight structure that converts to HTML, DOCX offers full word-processing features, and PDF fixes the layout for printing and sharing.

PDF Format Guide Word Format Guide PowerPoint Format Guide

TXT — Frequently Asked Questions

What is a TXT file?

A plain text file containing only characters, with no formatting, images or layout. Any text editor can open it.

Why do some characters look garbled in my text file?

The file was saved in one character encoding and opened in another. Saving as UTF-8 avoids most problems.

How do I open a TXT file?

Notepad on Windows, TextEdit on macOS, any code editor, a web browser, or the Files app on phones.

Can a TXT file contain images or bold text?

No. For formatting, use a word-processing format like DOCX, or Markdown for lightweight structure.

How do I turn a TXT file into a PDF?

Convert it with a TXT to PDF converter, which lays the text out on pages in a consistent font so it prints and displays the same everywhere.

Is TXT good for long-term storage?

Yes. Plain UTF-8 text is one of the most durable formats there is, readable by virtually any software now and in the future.

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