Excel Workbook
.xlsx.xls.xlsmMicrosoft Excel, and any tool that writes Excel-compatible workbooks
What it is
Microsoft Excel's workbook format, read via SheetJS (the industry-standard JS Excel library) — one of AltaiPlot's oldest and most exercised importers, since it's the format most researchers already have their data in.
Who produces it
Virtually every lab and research group, for anything from raw instrument exports to manually-curated result tables.
What we read / what we don't read
What we read
- Cell values (numbers, text, dates) from any sheet
- Multiple sheets — pick which one to import if the workbook has more than one
- Files up to ~20 MB via the in-browser reader; larger files are handed to a bundled Python (openpyxl) reader automatically so a huge workbook doesn't crash the app
What we don't read
- Formulas — only their last-calculated value is read, not the formula itself
- Cell formatting/styles, merged-cell layout, embedded charts, macros
How to import it into AltaiPlot
- Open AltaiPlot and drag your .xlsx/.xls/.xlsm file onto the window, or use File → Import.
- If the workbook has multiple sheets, pick the one you need from the list shown.
- Preview the columns before committing.
- Click Import — very large workbooks are handled automatically via a background reader, no extra steps needed.
Auditability note: this page's capability claims are sourced fromsrc/renderer/src/engine/v7/import/importers/XlsxImporter.ts:1 — see the full format list for every extension AltaiPlot recognizes.