Create, edit, and manage professional Excel workbooks with full support for formulas, formatting, templates, and complex spreadsheet structures.
by
Iván
Excel / XLSX enables high-fidelity interaction with Excel workbooks, preserving formulas, formatting, merged cells, and workbook structure.
It is designed to prevent data corruption and formatting drift across .xlsx, .xlsm, .xls, .csv, and .tsv workflows.
Load sheets, styles, named ranges, and hidden elements to keep structure stable.
Keep long identifiers and zip codes intact by enforcing explicit types.
Account for Excel's 1900/1904 date systems and serial date behavior.
Save with original styles, templates, and formulas preserved.
Write live formulas instead of static values to keep workbooks interactive.
Maintain existing styles, print settings, and workbook structures during edits.
Prevents Excel from mangling ZIP codes, phone numbers, or long IDs by enforcing correct data types.
Supports .xlsx, .xlsm, .xls, .csv, and .tsv files.
Optimized for memory efficiency using streaming and chunked reads for massive datasets.
Generate complex workbooks with cross-sheet formulas and assumptions.
Update templates with new data while keeping branding and conditional formatting.
Convert CSV or TSV into structured Excel files with correct types and headers.
npx clawhub@latest install excel-xlsxRun in your terminal, or click the Install button at the top of this page for one-click setup.
It supports .xlsm files for reading and writing; macro execution is handled by Excel itself.
It handles Excel's 1900/1904 date systems, the 1900 leap-year quirk, and fractional times.
Yes. It uses streaming and chunked reads to manage large datasets.
Yes. It keeps workbook structure including named ranges and hidden elements.
Yes. It applies explicit formats for IDs, phone numbers, and large integers to avoid truncation.