Workbook archive upgrades
Normalize historical spreadsheets while retaining an editable workbook result for review.
Spreadsheet modernization
Convert XLS to XLSX before worksheet parsing, migration, or structured AI use
Legacy XLS workbooks can contain operational tables, financial models, inventories, schedules, and reference data. XLSX provides a modern intermediate package for libraries that inspect worksheets, typed cells, formulas, styles, and table-shaped content.
Good-fit scenarios
Data preparation
Hand XLSX to a downstream step that selects sheets, ranges, headers, and typed values.
Application compatibility
Accept XLS uploads from customers when the normal processing library expects XLSX.
AI-assisted analysis
Prepare a workbook for structured extraction before summarization, question answering, or anomaly review.
Recommended pipeline
XLS→CoreNova API→XLSX→sheet/range selection→CSV or JSON→analytics or AI
For RAG, do not blindly embed a whole workbook as one text block. Identify the relevant sheet, preserve row and column headers, attach workbook and sheet metadata, and choose whether formulas, displayed values, or both should be available to the downstream system.
Request
curl --request POST 'https://api.corenovacloud.com/v1/conversions' \
--header "Authorization: Bearer ${CORENOVA_API_KEY}" \
--header 'Idempotency-Key: inventory-workbook-2008-0042' \
--form '[email protected]'Quality checks
- Compare sheet names, used ranges, merged cells, row and column dimensions, and cell types.
- Check formulas and their cached/displayed results.
- Inspect number formats, dates, borders, fills, and conditional presentation used by the business.
- Recalculate with the destination spreadsheet engine when your workflow depends on current formula values.
- Test representative workbooks before a batch migration.
Known exclusions: XLS external-workbook references and documented database-formula cases are rejected. VBA preservation is disabled, and macros are never executed.