TXT to XLSX Converter

Turn plain text data into XLSX spreadsheets — free online

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Structured Data Output

Raw text transforms into organized XLSX columns and rows. Sorting, filtering, and formulas become instantly available in Excel.

Cloud-Powered Processing

Conversion runs entirely on remote servers — your machine stays unburdened. No Excel installation or plugins necessary.

Any Device, Any OS

Convertio works in any modern browser. Convert TXT to XLSX from Windows, macOS, Linux, or a mobile device — no restrictions.

How to convert TXT to XLSX

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose xlsx or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your xlsx file right afterwards

About formats

TXT (Plain Text) is the most fundamental digital document format, storing unformatted text as a sequence of character codes with no embedded styling, layout instructions, or metadata beyond the characters themselves. The foundation of plain text computing traces to the ASCII standard published in 1963 by the American Standards Association (now ANSI), which defined 128 character codes including uppercase and lowercase Latin letters, digits, punctuation, and control characters. Modern plain text files typically use UTF-8 encoding, a variable-width Unicode scheme that encompasses virtually every writing system worldwide while maintaining backward compatibility with ASCII. Line endings vary by platform convention — LF on Unix/macOS, CR+LF on Windows — though most contemporary tools handle both transparently. One advantage is absolute universality — TXT files can be created, read, and edited on every computing device ever manufactured, from 1960s mainframes to modern smartphones, without any specialized software. The minimal overhead is another core strength: plain text carries zero formatting baggage, making TXT files ideal for configuration files, log output, data interchange, source code, scripts, and any context where content must be processed programmatically. Plain text serves as the substrate for structured formats like CSV, JSON, XML, YAML, and Markdown, and remains the input/output medium for virtually all command-line tools and programming environments. Despite decades of richer alternatives, TXT endures as the one truly universal document format.
Developer: ANSI
Initial release: 1963
XLSX is the default spreadsheet format for Microsoft Excel since Office 2007, based on the Office Open XML (OOXML) standard published as ECMA-376 and adopted as ISO/IEC 29500. An XLSX file is a ZIP archive containing XML documents that describe workbook structure, sheet data, styles, shared strings, formulas, charts, pivot tables, and relationships between components. Each worksheet is stored as a separate XML part where cells are organized by row and column references with typed values and style indices. The XML foundation enables programmatic spreadsheet creation and manipulation using libraries like openpyxl (Python), Apache POI (Java), and ClosedXML (.NET) without requiring Excel. XLSX dramatically expanded capacity compared to XLS: over 1 million rows and 16,384 columns per sheet, enabling use cases previously impossible in the binary format. One advantage is openness and cross-platform support — the documented OOXML specification enables implementation by LibreOffice Calc, Google Sheets, Apple Numbers, and numerous specialized tools. Built-in ZIP compression is another practical strength: XLSX files are typically 50-75% smaller than equivalent XLS files, and the modular XML structure improves data recovery when files are partially corrupted. The format supports modern Excel features including structured tables, slicers, sparklines, Power Query connections, and real-time co-authoring. XLSX has become the standard format for spreadsheet data interchange across business, scientific, and government domains.
Developer: Microsoft
Initial release: January 30, 2007

Frequently Asked Questions

Why convert TXT to XLSX?

XLSX gives your data structure — columns, rows, formulas, and charts. Plain text data becomes a fully functional Excel spreadsheet.

What programs open XLSX?

Microsoft Excel, Google Sheets, LibreOffice Calc, Apple Numbers, and WPS Spreadsheets all open XLSX files without issues.

Does the data parse into columns?

Delimited text (tabs, commas, etc.) is recognized and split into separate spreadsheet columns during the conversion process.

Can I convert large TXT files?

Yes — Convertio handles sizable text files and maps their content into XLSX rows and columns efficiently on cloud servers.

Is this conversion free?

TXT to XLSX conversion is free on Convertio. Upgraded plans provide larger allowances and faster turnaround for bulk work.

Do I need Excel installed?

Not at all. The conversion happens entirely online — no spreadsheet software required on your device to produce the XLSX.

TXT to XLSX Quality Rating

4.2 (38,358 votes)
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