usefulweb.site Office to PDF Converter

PDF & documents

Office to PDF Converter

Convert Word, Excel, PowerPoint, OpenDocument, RTF and CSV files to PDF with LibreOffice.

Max 100 MB. Macros are never run. Processed on our server and deleted; the PDF can be downloaded for about 2 hours.

Embeds all fonts and adds archival metadata; files can be slightly larger.

Try an example: RTF letter to PDF · Semicolon CSV to a PDF table

How it works

Converts DOCX, DOC, ODT, RTF, PPTX, PPT, ODP, XLSX, XLS, ODS and CSV files to PDF (optionally PDF/A-2b) with LibreOffice running headless on our server. Reports the page count and the fonts used in the PDF, so you can spot substituted fonts, and shows a preview of page 1.

  • The file type is detected from the content (OLE2 stream names for DOC/XLS/PPT, the ZIP structure for DOCX/XLSX/PPTX and OpenDocument, the {\rtf header for RTF). CSV is accepted as UTF-8 text with a .csv/.tsv name; the separator (comma, semicolon or tab) is taken from the first line.
  • LibreOffice converts the file headless with a fresh private profile per job and a 180-second limit. Macros are not executed. Spreadsheets export every sheet with its print ranges and page setup.
  • Fonts not installed on the server are substituted: Liberation fonts stand in for Arial, Times New Roman and Courier New with identical metrics, Carlito/Caladea (if installed) for Calibri/Cambria; other fonts fall back to similar ones, which can change line and page breaks.
  • The font list is read from the produced PDF (qpdf), so you can see exactly which fonts were used. Dates and random IDs are removed so the same input always gives the same PDF.

Layout fidelity is good but not perfect: complex Word/PowerPoint layouts, SmartArt, some charts, embedded objects and missing fonts can render differently from Microsoft Office. Check the PDF before sending it.

For scripts and AI agents

  • JSON API: POST https://officetopdfconverter.usefulweb.site/api/v1/calculate (same calculation as this page)
  • Interface description: OpenAPI 3.1 · AI guide: llms.txt
  • MCP server (Streamable HTTP): https://officetopdfconverter.usefulweb.site/mcp · tool name office_to_pdf_converter
Example request
curl -s -X POST https://officetopdfconverter.usefulweb.site/api/v1/calculate \
  -H 'content-type: application/json' \
  -d '{"file":{"filename":"notes.rtf","contentType":"application/rtf","contentBase64":"e1xydGYxXGFuc2lcZGVmZjB7XGZvbnR0Ymx7XGYwIExpYmVyYXRpb24gU2VyaWY7fXtcZjEgQ2FsaWJyaTt9fVxmMFxmczM2IE1lZXRpbmcgbm90ZXNccGFyXGZzMjQgQWdlbmRhOiBidWRnZXQsIHRpbWVsaW5lIGFuZCBuZXh0IHN0ZXBzLlxwYXJcZjEgVGhpcyBsaW5lIGFza3MgZm9yIENhbGlicmksIHdoaWNoIGlzIHJlcGxhY2VkIGJ5IGEgbWV0cmljLWNvbXBhdGlibGUgZm9udC5ccGFyfQ=="}}'

Related tools

  • PDF Merge, Split & Reorder – Merge PDFs, split by page count or ranges, and reorder, remove, rotate or duplicate pages.
  • PDF Compressor – Make PDFs smaller with Ghostscript presets or custom image DPI and JPEG quality, with previews.
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