Supported file types
The following table lists the file types which are supported as attachments by the InterFAX service. Attempting to send a file with an extension which is not its native extension, as defined below, will result in a rendering error.
See also System limitations for unsupported file behaviors.
| Document Extension | File Type | MIME Type |
|---|---|---|
| DOC, DOCX | Created by Microsoft Word 97, 2000, XP, 2003, 2007, 2010, 2013, 2016 & 365; Google Docs; Zoho Docs | application/msword, application/vnd.openxmlformats-officedocument.wordprocessingml.document |
| DOT | Created by Microsoft Word 97, 2000, XP, 2003, 2007, 2010, 2013, 2016 & 365. | application/msword |
| XML | Currently supported XML types: Microsoft Word 2003 XML | application/xml |
| Adobe Acrobat (Version 9) | application/pdf | |
| TIF | Group 3 TIFF, may be in standard or fine resolution | image/tif |
| TXT | ASCII Plain Text | text/plain |
| XLS, XLSX |
Microsoft Excel 97, 2000, XP, 2003, 2007, 2010, 2013, 2016 & 365; Google Docs; Zoho Docs Note: Only active worksheets will be faxed |
application/vnd.ms-excel |
| HTM/HTML | HTML is opened and converted to fax using either Chrome, or Internet Explorer v10. | text/html |
| MHT |
MHT web archive files; HTML with embedded images Note that HTML is opened and converted to fax using either Chrome, or Internet Explorer v10. |
message/rfc822 |
| URL | Windows URL files Notes: 1. The contents of the linked page will be faxed; 2. HTML is opened and converted to fax using either Chrome, or Internet Explorer v10. | application/internet-shortcut |
| PPT, PPTX | Microsoft PowerPoint 97, 2000, XP, 2003, 2007, 2010, 2013, 2016 & 365; Google Docs; Zoho Docs | application/vnd.ms-powerpoint |
| GIF | Non-animated GIF files * | image/gif |
| PNG | PNG files | image/png |
| JPG/JPEG | JPEG files * | image/jpg |
| PS | PostScript | application/postscript |
| EPS | Encapsulated PostScript | application/eps |
| RTF | Rich Text Format | application/rtf |
| BMP | Windows Bitmap * | image/bmp |
| SNP | Microsoft Access Snapshot (Version 10 on Windows 2000) | application/snapshot |
| ZIP | Any of the above file types may be compressed as a zip file. Multiple files within a single zip file are allowed. | application/zip |
* = For best results use grayscale and fine resolution.
** = For best results use only monochrome (1-bit color, not grayscale) with the image sizes below.
Image sizes
| Standard Resolution | Fine Resolution | |||
|---|---|---|---|---|
| Width | Height | Width | Height | |
| A4 | 1,728 | 1,169 | 1,728 | 2,338 |
| Letter | 1,728 | 1,100 | 1,728 | 2,200 |
| Legal | 1,728 | 1,400 | 1,728 | 2,800 |
| B4 | 2,048 | 1,357 | 2,048 | 2,714 |