TCR to XLS Converter

Convert compressed text to Excel XLS — free online

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Structured Data Output

TCR to XLS conversion takes your PalmOS text and organizes it into a spreadsheet — sort, filter, and analyze the content in Excel.

Online Processing

Convertio handles the conversion entirely on cloud servers. No Excel installation required — just upload, convert, and download.

Secure Handling

Uploaded TCR files are removed immediately. XLS output spreadsheets are deleted from Convertio servers within 24 hours.

How to convert TCR to XLS

1

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

2

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

3

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

About formats

TCR (Text Compression for Reader) is a compressed plain-text ebook format developed by Barry Childress in the early 1990s for the Psion Series 3 family of palmtop computers. The format was created for Childress's Reader3 application, a text file viewer that needed to fit large books into the Psion's extremely limited storage — typically 128 KB to 2 MB of available memory. TCR uses a dictionary-based compression scheme derived from the earlier ZVR format by Ian Giddings, replacing repeated byte sequences with single-byte tokens that reference a header dictionary. This straightforward approach achieves compression ratios of roughly 40-60% on typical English prose while requiring minimal CPU resources for decompression. The Psion Series 3 ran on a 3.84 MHz NEC V30 processor with no floating-point unit, so TCR's low computational overhead was essential for smooth page-by-page reading. A key advantage is remarkable storage efficiency for its simplicity — users could carry dozens of novels on removable SSD cards that held only a few hundred kilobytes. The format found a dedicated user community among Psion enthusiasts who built libraries of compressed literature for portable reading years before smartphones existed. Though the Psion platform faded from the market in the early 2000s, TCR files can still be opened and converted by modern ebook tools, and the format stands as an early example of purpose-built mobile reading technology from the pre-smartphone era.
Developer: Barry Childress
Initial release: 1993
XLS is the binary spreadsheet format of Microsoft Excel, first introduced with Excel 1.0 for Macintosh in September 1985 and becoming the dominant spreadsheet format worldwide. The format stores workbooks as OLE2 compound document files using the Binary Interchange File Format (BIFF), organizing sheets, cells, formulas, formatting, charts, pivot tables, macros, and metadata across multiple internal streams. Each cell record encodes the cell's value (number, string, boolean, error, or formula), position, and formatting index, while shared string tables and style records reduce redundancy. The format evolved through BIFF versions (BIFF2 through BIFF8), with BIFF8 (Excel 97) establishing the structure used through Excel 2003. XLS supports up to 65,536 rows and 256 columns per sheet, a limit that drove the creation of XLSX. One advantage is universal spreadsheet compatibility — XLS files are recognized by every major spreadsheet application including LibreOffice Calc, Google Sheets, Apple Numbers, and dozens of programming libraries across all platforms. The format's mature feature set is another strength: XLS handles complex formulas, conditional formatting, data validation, named ranges, array formulas, external references, and VBA macros. Although XLSX replaced XLS as the default in Office 2007, the binary format persists in financial institutions, legacy reporting systems, and any environment where Excel 97-2003 compatibility is required.
Developer: Microsoft
Initial release: September 1985

Frequently Asked Questions

Why convert TCR to XLS?

TCR holds flat compressed text. XLS structures that text into spreadsheet rows and columns — useful for organizing data or line-by-line analysis.

What opens XLS files?

Microsoft Excel, LibreOffice Calc, Google Sheets, WPS Spreadsheets, Apple Numbers, and most office suites open XLS format natively.

How is text mapped to cells?

Text content is typically placed into cells by line or paragraph. You can reorganize the data freely once opened in your spreadsheet app.

Is XLS good for plain text data?

When your TCR contains structured or tabular information, XLS makes it sortable and filterable — far more useful than raw text.

Is TCR to XLS conversion free?

Yes, Convertio provides TCR to XLS conversion at no cost. Premium plans offer batch uploads and expanded capacity.