ODS viewer online —
without uploading files.

All sheets, search in cells. Nothing is sent to a server.

PDF · Word · PowerPoint · Excel · images · DICOM
all 21 formats

How it works

  1. Choose an .ods file
    Drop it on the page, pick it with the button or paste it with Ctrl V. Templates (.ots) open too.
  2. It opens in your browser
    The spreadsheet is read on your device in the background, without LibreOffice and without an upload.
  3. Browse and search
    Switch between sheets at the bottom and find any value with the cell search.

A free ODS viewer — no LibreOffice needed

Spreadsheets made in LibreOffice or OpenOffice Calc are saved as .ods, and Excel or a phone does not always open them. OsonKit shows every sheet in the browser on any computer or phone, with values formatted as in the spreadsheet.

There is nothing to install and no account. The file is read on your device and never uploaded, so budgets, timetables and lists stay private.

21 formats

Everything you can open

Documents

4 formats
PDFPDFPages, zoom, search, printDOCXWordText, tables, charts, SmartArtDOCWord 97–2003Text onlyParagraphs and tablesRTFRich TextFormatting, tables, pictures

Presentations

4 formats
PPTXPowerPointSlides, notes, search, slide showODPImpressLibreOffice and OpenOffice slidesPPTPowerPoint 97–2003Text onlySlide text and notesKEYKeynotePreviewFirst slide and slide count

Spreadsheets & data

5 formats
XLSXExcelAll sheets, search in cellsXLSExcel 97–2003Old .xls workbooksODSCalcLibreOffice spreadsheetsCSVCSVUp to a million rowsJSONJSONCollapsible tree or text

Medical scans

2 formats
DCMDICOMCT, MRI, X-ray; series and study foldersNIINIfTIResearch MRI in three planes

Text

2 formats
MDMarkdownPreview and sourceTXTPlain textAny encoding, line wrap

Images

1 format
IMGPNG, JPG, WEBP, GIFZoom, fit, actual size

Guides

Short answers to common file questions

OfficeHow to open an XLSX file without Excel4 min readOfficeHow to open an ODP presentation without LibreOffice4 min read
All guides

Questions

Is my spreadsheet uploaded anywhere?

No. Your browser opens the spreadsheet directly on your device. The site only loads its own scripts, styles and fonts; the contents, name and bytes of your file are never sent to a server.

How do I open an .ods file without LibreOffice?

Drop the file on this page or pick it with the button. The spreadsheet opens here in your browser with all its sheets and a search in cells — nothing to install, and the file is not uploaded.

What is shown?

The values of every sheet, formatted as in the spreadsheet. Formulas are not recalculated, and charts and pictures are not shown. Password-protected spreadsheets are recognised but not opened.

Can I open LibreOffice text documents (.odt)?

Not yet. LibreOffice Impress presentations (.odp) open in the presentation viewer; for a text document, save it as .docx.

How large can the spreadsheet be?

Up to 20 MB, 100 sheets and 1,000,000 rows per sheet. When a sheet is longer, the first rows are shown and the status bar says so.