DOCX / DOCMicrosoft Word
XLSX / XLSMicrosoft Excel
PPTX / PPTMicrosoft PowerPoint
ODTOpenDocument Text
ODSOpenDocument Spreadsheet
ODPOpenDocument Presentation
Office to PDF: Convert Word, Excel, PowerPoint and ODF Files
Convert Office to PDF online: upload Word, Excel, PowerPoint, OpenDocument, RTF or CSV files and download a PDF of each, made with LibreOffice. You can mix file types in one upload. No install, no sign-up.
// how it works
Convert Office Files to PDF Online in 4 Easy Steps
- 01Pick your Office files (DOCX, XLSX, PPTX, ODT, RTF, CSV and more) or drag and drop them here.
- 02Add or remove files until the list is right.
- 03Click 'Convert To PDF'. Every file gets converted on its own.
- 04Download your PDF, or a ZIP file if you converted several.
Office to PDF: supported formats, how it works and a tested example
Word, Excel and PowerPoint files look different depending on the program, version and fonts of whoever opens them. Converting Office to PDF gives you a fixed copy that reads and prints the same everywhere, and nobody can change it by accident.
Our Office to PDF converter takes Microsoft Office, OpenDocument, RTF and CSV files in one place and turns each one into a PDF with LibreOffice. You can mix file types in one upload, and you get one PDF per file.
Convert Office files to PDF now
How to convert Office files to PDF online
There's nothing to set. Each file goes through the export filter that fits its type.
- Click Choose Files and pick one or more Office files, or drag them onto the page.
- Add or remove files until the list looks right.
- Click Convert To PDF and wait while each file converts.
- Click Download to save the PDF, or a ZIP file if you converted several.
Which Office and OpenDocument formats are supported?
- Text documents: DOC, DOCX, ODT and RTF.
- Spreadsheets: XLS, XLSX, ODS and CSV.
- Presentations: PPT, PPTX and ODP, one PDF page per slide.
- Drawings: ODG.
ODT, ODS, ODP and ODG belong to the OpenDocument standard (ISO/IEC 26300) that LibreOffice and OpenOffice use. Each file can be up to 25 MB. PostScript and EPS aren't Office formats; PostScript to PDF converts those.
What a mixed upload gives you
In October 2026 we converted our test files test.docx, test.xlsx and test.pptx in one run, plus an ODP presentation and an ODG drawing. Every PDF kept the page size of its source. Nothing got forced to A4.
| File | PDF pages | Page size in points | PDF size |
|---|---|---|---|
| test.docx | 1 | 612 x 792 (Letter, as set in the document) | 18.2 KB |
| test.xlsx | 2, one per sheet | 595 x 842 (A4) | 36.8 KB |
| test.pptx | 1 | 720 x 540 (the 4:3 slide size) | 21.7 KB |
| test.odp | 1 | 720 x 540 (the slide size) | 21.7 KB |
| odg-vector-fixture.odg | 1 | 595 x 842 (the drawing's A4 page) | 7.1 KB |
Each file gets its own request, which took under a second per file on our local test server. With more than one PDF the download is a ZIP named PDFTools.zip, and each PDF is named after its source with _OfficeToPDF.pdf in place of the extension.
That naming bites when files share a name. Our test.docx, test.xlsx and test.pptx all became test_OfficeToPDF.pdf, so the ZIP held test_OfficeToPDF.pdf, test_OfficeToPDF_2.pdf and test_OfficeToPDF_3.pdf in upload order. Give files like that distinct names before you upload.
How LibreOffice converts your files
Our server runs LibreOffice without a screen and converts each file from the command line, the way the LibreOffice help on start parameters describes with its convert-to pdf option. Writer does text documents, Calc spreadsheets, Impress presentations and Draw drawings.
Before converting, the server checks the first bytes of DOC, DOCX, XLS, XLSX, PPT, PPTX, RTF and the OpenDocument files. A JPG photo renamed to .docx got refused with "The file is not a valid .docx document. It may be damaged or renamed.", and so did a Word file with a password to open, since encryption turns it into a different container.
CSV files have no signature to check, so the server reads their first bytes for signs of a binary file instead. We renamed the same photo to .csv, and it was refused with "The file is not plain text. It may be a binary file that was renamed." A real CSV prints every value as written, so a code like 00123 keeps its leading zeros.
If one file of an upload is refused, the others still convert, and the download holds only the PDFs that worked.
Uploads and PDFs get deleted automatically within two hours. You don't need an account, and we don't add a watermark.
Fonts, links, tracked changes and speaker notes
Text in Calibri, Cambria, Segoe UI or Consolas keeps its font. Text in Aptos comes out in a different, serif font. In October 2026 we converted Word and PowerPoint test files built to check each of these points, then read the fonts, links and text of the PDFs.
| In the source file | In the PDF |
|---|---|
| Lines in Calibri, Cambria, Segoe UI and Consolas | The same fonts, embedded |
| Lines in Aptos and Aptos Display | Noto Serif instead, because Aptos is not installed on our server |
| Wingdings and Symbol bullets | Printed as a square and a round bullet |
| A web link, a mailto link and a link to a bookmark | All 3 clickable |
| Three Heading 1 headings, each on a new page | PDF bookmarks Background, Method and Results; 4 pages |
| An unaccepted deletion and insertion | Both printed as markup: CHF 40 struck through, CHF 45 underlined, in colour |
| A comment | Not in the PDF |
| 3 slides with speaker notes, the second hidden | 2 pages, no notes; the hidden slide is left out |
If your document is set in Aptos, switch it to one of the fonts in the first row before you upload, or export the PDF from Word itself. And accept or reject all tracked changes first, unless the reader is meant to see the markup.
What happened when we tested Office to PDF
We converted our small test file test.docx (25.7 KB), a short Word document, with no options to choose; the tool processed the file as uploaded. It returned a 1-page PDF of 18.2 KB, ready 0.8 seconds after we clicked Convert To PDF on our local test server. Tested in October 2026.
Which tool for which download
| What you want to download | Tool |
|---|---|
| One PDF per file, from mixed Office types | Office to PDF (this page), a ZIP for several files |
| One combined PDF from mixed Office types, in upload order | Merge Office to PDF; no PDF at all if one file fails |
| One PDF from several workbooks only | Merge Excel to PDF |
| PDFs from Word files only | Word to PDF |
| PDFs from presentations only | PowerPoint to PDF |
For a big batch we'd pick Office to PDF, because one bad file doesn't stop the rest. The single-format pages explain the settings that matter for their type, such as print areas in Excel to PDF.
Frequently Asked Questions about Office to PDF
Do I need Microsoft Office installed?
No. The conversion runs on our server with LibreOffice, so all you need is a browser.
What happens if one file in my upload fails?
The other files still convert and you get their PDFs. The failed file is listed with the reason, such as a password or a renamed file.
Why are my PDFs not all A4?
Each PDF keeps the page size of its source: a Letter document stays Letter and a slide keeps its slide size. Change the page size in the source file, or resize the PDF afterwards.
Can I combine several Office files into one PDF?
Not with this tool, which makes one PDF per file. Merge Office to PDF gives you a single combined PDF.
Is the Office to PDF converter free?
Yes. You don't need an account, and it doesn't add a watermark to the PDF.