PPT8 extensions
PowerPoint
- .pptx
- .pptm
- .potx
- .potm
- .ppt
- .dps
- .dpt
- .odp
Preview
Show the document before anyone has to download it.
OfficeAPI renders documents, spreadsheets, and presentations for display inside your product. Here is every extension it can preview.
32 preview extensions3 office families
Format coverage
Which formats can OfficeAPI preview?
Grouped by office family and taken directly from the product documentation.
DOC13 extensions
Word
- .docx
- .dotx
- .docm
- .dotm
- .doc
- .dot
- .wps
- .wpt
- .odt
- .ofd
- .rtf
- .epub
- .txt
XLS11 extensions
Excel
- .xlsx
- .xlsm
- .xltx
- .xltm
- .xlsb
- .xls
- .xlt
- .et
- .ett
- .csv
- .ods
In your product
A preview is a render, not an upload.
The same engine that converts a file can also show it, so the coverage you see here matches the conversion matrix.
Review conversion formatsOffline by default
OfficeAPI renders the preview on the device or server you run it on. Nothing is sent to a hosted viewer.
One engine for both surfaces
Preview and conversion read the same documents, so coverage stays consistent between the two.
Everywhere your product runs
Desktop, mobile, and server operating systems get the same rendering from the same core.
Preview vs conversion
What is the difference between preview and conversion?
A preview is a rendered view of a document shown inside your product. A conversion is a new file written in another documented format. Both come from the same engine.
| Aspect | Preview | Conversion |
|---|---|---|
| Purpose | Show the document inside your product | Produce a file in another documented format |
| Result | A rendered view | A new file: DOCX, XLSX, PPTX, PDF, images, or CSV |
| Documented coverage | 32 extensions | 42 input/output pairs |
| Runs offline | Yes | Yes |
| Engine | Same Rust core | Same Rust core |
How it works
How do you add a document preview with OfficeAPI?
- 01
Confirm the extension
Check the three lists below. Preview has its own list, separate from the conversion matrix.
- 02
Hand the file to OfficeAPI
Call the engine through the dynamic library or as a process, on the device or server where the file already is.
- 03
Render inside your product
OfficeAPI renders the document; your app displays the result in its own UI, with no hosted viewer in between.
Questions
Preview formats, answered.
32 extensions across 3 office families, rendered fully offline.
- How many formats can OfficeAPI preview?
- 32 extensions across 3 families: 13 Word, 11 Excel, and 8 PowerPoint.
- Is the preview list the same as the conversion list?
- No. Some extensions, such as .epub, .txt, .ofd, and .xlsb, can be previewed but are not conversion inputs. Always check the list for the surface you are building.
- Does preview need a network connection?
- No. Preview runs wherever OfficeAPI runs, fully offline, on a local device or in an environment you manage.
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