Have you received an email from us asking you to resend your documents in a different format?

If so, don’t worry - we have provided a list of acceptable formats for you below, that outlines all acceptable document types.

If you are still unsure, please contact one of the Live Chat team via the 'Need help' icon at the side of this page (they’re online Mon-Fri 8am-8pm, Sat 9am-5pm, Sun 9am-2pm).

Extension  Kind of document MIME Type
.aac AAC audio/aac
.abw AbiWord document application/x-abiword
.arc Archive document (multiple files embedded) application/x-freearc
.avif AVIF image image/avif
.avi AVI: Audio Video Interleave video/x-msvideo
.bmp Windows OS/2 Bitmap Graphics image/bmp
.bz BZip archive  application/x-bzip
.bz2 BZip2 archive application/x-bzip2
.cda  CD audio application/x-cdf
.css Cascading Style Sheets (CSS) text/css
.csv Comma-separated values text/csv
.doc Microsoft Word application/msword
.docx Microsoft Word (OpenXML) application/vnd.openxmlformats-officedocument.wordprocessingml.document
.eml Email message message/rfc822
.eot MS Embedded OpenType fonts


.epub Electronic publication (EPUB) application/epub+zip
.gz GZip Compressed Archive application/gzip
.gif Graphics Interchange Format (GIF)  image/gif
.htm Hypertext Markup Language text/html
.html (HTML)  
.ico Icon Format image/vnd.microsoft.icon
.ics iCalendar format text/calendar
.jpeg .jpg JPEG images image/jpeg
.json JSON format application/json
.jsonld JSON-LD format application/ld+json
.mid .midi Musical Instrument Digital Interface (MIDI) audio/midi audio/x-midi
.mp3 MP3 audio audio/mpeg
.mp4 MP4 video/mp4
.mpeg MPEG video video/mpeg
.odp OpenDocument presentation document application/vnd.oasis.opendocument.presentation
.ods OpenDocument spreadsheet document application/vnd.oasis.opendocument.spreadsheet
.odt OpenDocument text document application/vnd.oasis.opendocument.text
.oga  OGG audio audio/ogg
.ogv OGG video video/ogg
.ogx  OGG application/ogg
.opus Opus audio audio/opus
.png Portable Network Graphics image/png
.pdf Adobe Portable Document Format (PDF) application/pdf
.php Hypertext Preprocessor (Personal Home Page) application/x-httpd-php
.ppt Microsoft Powerpoint application/vnd.ms-powerpoint
.pptx Microsoft Powerpoint (OpenXML) application/vnd.openxmlformats-officedocument.presenationml.presentation
.rar RAR archive application/vnd.rar
.rtf Rich Text Format (RTF) application/rtf
.svg Scalable Vector Graphics (SVG) image/svg+xml
.swf Small web format (SWF) or Adobe Flash document application/x-shockwave-flash
.tar Tape Archive (TAR) application/x-tar
.tif .tiff Tagged Image File Format (TIFF) image/tiff
.txt Text, (generally ASCII or ISO 8859-n) text/plain
.vsd Microsoft Visio application/vnd.visio
.wav Waveform Audio Format audio/wav
.weba WEBM audio audio/webm
.webm WEBM video video/webm
.webp WEBP image image/webp
.xhtml XHTML application/xhtml+xml
.xls Microsoft Excel application/vnd.ms-excel
.xlsx Microsoft Excel (OpenXML) application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
.xml XML application/xml
.xul XUL application/vnd.mozilla.xul+xml
.zip ZIP archive application/zip
.3gp 3GPP audio/video container video/3gp;audio/3gpp if it doesn't contain video
.3g2 3GPP2 audio/video container video/3gpp2;audio/3gpp2 if it doesn't contain video
.7z 7-zip archive  application/x-7z-compressed