About TXT Files
Plain Text
TXT files contain unformatted plain text with no styling, images, or layout information. They are universally readable by any device and operating system, making them the simplest document format.
Family
Documents & Text
Extension
.txt
MIME Type
text/plain
Can Use As
54 58 54 46 00 01 00 00 4B 41 49 4A
ASCII: TXTF....KAIJ
📈 Target Minimum File Size (Guaranteed ≥ KB)
Lossless JPEG Q100 + standard COM segment padding for government & exam portals
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HOW TXT CAME TO BE.
The plain text file predates almost every other format on this page. When ASCII was standardized in 1963 (with a 1967 revision) it defined the 128 characters that every computer of the era would agree on. A file that contained nothing but those characters, separated by newlines, was the simplest possible document — and it became the universal interchange format for source code, configuration files, logs, and correspondence.
The arrival of Unicode in the 1990s — and UTF-8 in particular — extended the plain text file to cover every writing system on Earth without changing its core premise: just characters, no styling. Fifty years on, .txt is still the most portable format in existence.
Technical Specifications
- MIME type
- text/plain
- Common encodings
- UTF-8, UTF-16, ASCII, ISO-8859-1, Windows-1252
- Line endings
- LF (Unix), CRLF (Windows), CR (classic Mac)
- Max file size
- Limited only by filesystem (no format-level limit)
- Structure
- None — flat sequence of characters
Typical Sizes & Weights
Short note
< 1 KB
README file
2–20 KB
Full novel (~90,000 words)
500 KB – 1 MB
Server log file (daily)
10 MB – 1 GB
STRENGTHS & LIMITATIONS.
Strengths
- Universally readable — every operating system, every editor, every programming language.
- Zero metadata overhead: the file size equals the character count (for ASCII).
- Safe to diff, grep, version-control, and pipe through command-line tools.
- Immune to format obsolescence: a text file from 1970 still opens today.
- Tiny footprint for structured data like logs or configuration.
Limitations
- No styling, images, or embedded structure — just characters.
- Character encoding ambiguity (ISO-8859-1 vs UTF-8 vs Windows-1252) causes "mojibake".
- Line-ending differences between OSes still cause subtle bugs today.
- No way to carry hyperlinks, tables, or formatting without a convention on top (like Markdown).
CURIOSITIES & TRIVIA.
Every operating system disagrees about what a "line ending" is: CRLF on Windows, LF on Unix, CR on classic Mac.
UTF-8 was designed by Ken Thompson and Rob Pike on a placemat at a New Jersey diner in 1992.
The largest text file ever published is the English Wikipedia XML dump — over 100 GB uncompressed.
A .txt file can theoretically hold any content; only by convention does it mean "plain text".
The Byte Order Mark (BOM) at the start of some UTF files is a zero-width, invisible character that trips up countless parsers.
Specialized Utilities for .TXT Files
Merge PDF
Combine multiple PDF files into a single document. Drag and drop to reorder pages before merging. No software installation required.
Split PDF
Split a PDF into separate files by page ranges or extract individual pages. Perfect for isolating chapters, invoices, or specific sections.
Compress PDF
Reduce PDF file size without visible quality loss. Choose from low, medium, or high compression levels. Ideal for email attachments and web uploads.
PDF to Word Converter
Convert PDF documents into editable Microsoft Word (DOCX) files online for free while preserving layout, tables, and typography.
Word to PDF Converter
Convert Microsoft Word documents (DOCX, DOC) into print-ready PDF files with exact font embedding and layout preservation.
PDF to Excel Converter
Extract tables, financial rows, and structured columns from PDF files directly into editable Microsoft Excel (XLSX) spreadsheets.
Make PDF Searchable (OCR)
Add a searchable text layer to scanned PDF documents using OCR. The visual appearance stays the same but you can now search, select, and copy text.
Unlock PDF
Remove owner printing/copying restrictions and decrypt password-protected PDF files instantaneously once you enter the known password.
CONVERT FROM TXT
CONVERT TO TXT
Common Use Cases
Notes, logs, configuration files, data exchange, READMEs.
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Popular TXT conversions
The most-requested destinations when starting from TXT.
Frequently Asked Questions
TXT (Plain Text) is a document format used to store paginated text, with optional formatting, tables, images, hyperlinks, headers and footers. It sits in the documents & text family and is typically associated with a specific office suite or publishing pipeline that defined the format and ships the canonical reader.
Modern office suites — Microsoft Word, Google Docs, LibreOffice Writer, Apple Pages — open most TXT files with reasonable fidelity. If your installed software does not support TXT, convert to DOCX or PDF first using KaijuConverter; both open in virtually every reader, including free online viewers.
Upload the TXT to KaijuConverter and pick DOCX, PDF, ODT, RTF, HTML, Markdown, or plain text. Our pipeline runs LibreOffice headlessly plus pandoc for text formats — the same engines behind professional document pipelines. Styles, tables, images, and hyperlinks survive the conversion intact.
Yes, to a high degree. Standard fonts, headings, lists, tables, images, hyperlinks and page structure transfer cleanly. Custom fonts substitute to the closest match if not embedded; obscure layout features unique to TXT (frames, legacy macros) may flatten to static content in the target format.
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