Kertas OfficeCompatibility
What survives a round trip between Kertas and Microsoft Office, what is partial, and what is not built yet. Saved files are checked by reopening them in independent tools before each release.
Works wellOpens, edits and saves without loss
PartialKept, with a stated limit
Not yetOn the roadmap or out of scope
Writer and .docx
Text, styles, lists, tables, imagesWorks well
Headers, footers, sections, page numbersWorks well
Track changes and commentsWorks wellIncluding replies and resolved comments.
EquationsWorks wellSaved as native Word equations, editable in Word.
Citations, bibliography, table of contentsWorks wellAPA, MLA, Chicago, Harvard and IEEE.
Shapes with text wrapWorks well
Floating text boxesPartialKept when saved; their position inside Kertas can differ slightly from Word.
Older formats (.doc, .rtf, .odt)PartialOpen for editing and save as .docx. Full .doc formatting needs LibreOffice installed.
Presentations (.pptx)Not yetOut of scope. Kertas focuses on documents, spreadsheets and PDFs.
Sheets and .xlsx
Formulas, number formats, multiple sheetsWorks well
Fonts, fills, borders, merges, frozen panesWorks well
ChartsWorks wellColumn, bar, line, area, pie, doughnut and scatter, saved as real Excel charts.
Conditional formatting and sparklinesWorks wellAlso kept when exporting to PDF.
Data validation, filters, slicersWorks well
PivotTables made in KertasWorks wellSaved as genuine Excel pivots that refresh.
PivotTables from ExcelPartialKept with their values. Kertas can edit pivots with up to two row fields and two values.
CSVWorks wellKeeps leading zeros, long numbers, the original encoding and separator.
Older formats (.xls, .ods)PartialOpen for editing and save as .xlsx.
Macros (VBA)Not yetMacros do not run in Kertas.
Viewing, search, annotationsWorks well
Merge, split, reorder, rotate, delete pagesWorks wellBookmarks are kept.
Filling and creating formsWorks well
Certificate signaturesWorks wellReported valid by independent checkers; any later change breaks the signature.
RedactionWorks wellRemoves the content underneath, not just covers it.
Editing existing textPartialUses the original font where it is available; otherwise a close substitute.
OCR and conversion to Word and ExcelWorks wellAccuracy depends on scan quality.
Password-protected PDFsPartialOpen, protect and save with encryption. Permission limits set by the author (such as no printing) are removed when saved.
Known issues Live from GitHub
Problems we know about and are working on. Each one links to its discussion.
Found a file that does not open correctly?
Send us a sample with private details removed. Real-world files are how compatibility improves.