Back to Blog Tour Status

Supported File Formats for Proofing


For each asset type, recommended settings and options are provided in order to help reduce the risk of processing errors. A list of supported file types is also included.


For image-based assets, the following settings are recommended:

  • Dimensions are less than 4,000 pixels wide by 4,000 pixels high.
  • Color space is sRGB. 
  • Image is 72 dots per inch (DPI).
  • There are no specific embedded ICC color profiles.
  • Image is stripped of metadata, such as exchangeable image file format (EXIF) tags such as EXIF.

The following is a list of supported image and vector file formats:

Image File Formats Extension
Sony RAW Image .ARW
Bitmap Image .BMP
Adobe Illustrator Files (only if created with the "Create PDF Compatible File" box checked in Illustrator) .AI
Canon RAW Image .CR2
Canon RAW CIFF Image .CRW
Windows Cursor .CUR
Kodak Raw Image File .DCR
DirectDraw Surface .DDS
Adobe Digital Negative .DNG
Graphic Interchange Format .GIF
JPEG File Interchange Format (JFIF) .JPEG, .JPG
Minolta RAW Image .MRW
Nikon RAW Image .NEF
Olympus RAW Image .ORF
Pentax RAW Image .PEF
Portable Network Graphics .PNG
Adobe Photoshop Large Document .PSB
Adobe Photoshop Document .PSD
Targa Image .TGA
Tagged Image .TIF, .TIFF
Sigma Camera RAW .X3F


Vector File Formats Extension
Encapsulated PostScript .EPS
Level 2 Encapsulated PostScript .EPS2
Level 3 Encapsulated PostScript .EPS3
Encapsulated PostScript Interchange .EPT



Kantata Proofing uses Portable Document Format (PDF) so any non-PDF document, like a Word document, gets converted to a PDF. You can convert documents to PDFs before uploading them for Proofing. For best results, use the "Optimize for Web" option.

Note that some PDF features are not fully supported, or may only be partially supported.  

Embedded Images

Embedded images are converted into sRGB when opened in the Proofing Workspace regardless of color space, like CMYK.  

For best results, make sure your embedded images have a resolution of 110 dots per inch (DPI) or less, are in sRGB format, use JPEG encoding, and are sized accordingly. For example, you don't need a 5,000 x 5,000 pixel image in a PDF scaled-down for review.

Font Features

Embed all required fonts into the PDF. Otherwise, fallback fonts will be used and may cause discrepancies. 

Document Page Size

Since documents are rendered at 110 DPI and large page sizes are not rendered beyond 4,000 x 4,000 pixels, it is best to keep page sizes to 36 inches or less in width or height. 

Image Reuse

Reference the image within the PDF if you are using it more than once instead of embedding it each time. Note that most software handles this function automatically.

Layers, Transparencies, and Blends

Layers and transparencies consume a large amount of a browser's resources so it is best to flatten the document when possible.

Office Documents: Microsoft Excel

Like other document formats, it is best to convert your Excel document to a PDF before uploading it for review. Use Excel features like print preview, shrink to fit a single page, and print area to see how your Excel file looks when converted to PDF.

Kantata does preserve the page setup and layout settings of the Excel document.

Office Documents: Microsoft PowerPoint 

When PowerPoint presentations are converted to PDFs some features, such as animations and embedded controls for video may not be supported. 

While Kantata does not currently support the inclusion of speaker notes by default, you can save the PowerPoint presentation as a PDF and then include speaker notes before uploading for review. 

Unsupported Document Features

These interactive PDF features are not supported:

  • 3D
  • PDF Forms (XFA or AcroForms)
  • Embedded Content (Flash)
  • Javascript
  • PDF Annotations

The following is a list of supported document file formats:

Document File Formats Extension
Document .DOC
Microsoft Word Open XML .DOCX
Portable Document Format .PDF
Microsoft PowerPoint 97-2003 Slide Show .PPS
Microsoft PowerPoint Slide Show .PPSX
Microsoft PowerPoint 97-2003 Presentation .PPT
Microsoft PowerPoint Presentation .PPTX
PostScript .PS
Rich Text Format .RTF
Text File .TXT
Microsoft Excel 97-2003 Workbook .XLS
Microsoft Excel Open XML Workbook .XLSX


Uploaded video files are transcoded into a low, medium, and high rendition. Your internet connection is tested after the video is uploaded, and the most applicable version is used. In other words, if an uploaded video file does not meet the requirements for a high rendition, then only low-and-medium renditions are available.

The dimensions of your video determine what versions are available. Note that you can upload video files at any frame rate, however, any file that exceeds 30 frames per second (fps) still renders at 30 fps.

Video File Size Low Rendition Medium Rendition High Rendition
Width >1920 or Height >1080 Yes (Scaled) Yes (Scaled) Yes (Scaled)
Width 1280–1920 or Height 720–1080 Yes (Scaled) Yes (Scaled) Yes
Width 640–1280 or Height 360–720 Yes (Scaled) Yes No
Width < 640 and Height < 360 No Yes (Low rendition becomes the default option) No

To bypass transcoding and save processing time, follow the recommended default format for video and audio. Note that these recommendations are the same for medium and high renditions.

Video Settings Supported Recommended
Codec H264 H264
Profile 1, 1b, 1.1, 1.2, 1.3, 2, 2.1, 2.2, 3, 3.1, 3.2, 4, 4.1 4.1
Size 720p (1280 x 720) or less 720p
Level High, Main, or Baseline High
Bitrate 62,500 kb/s for High Profile 50,000 kb/s for Main/Baseline Profiles 1000–8000kb/s
Color space YUV420p (6 bytes per 4 pixels, reordered) YUV420p
Framerate 30 fps or less 25 fps (PAL) or 30 fps (NTSC)


Audio Settings Supported Recommended
Sample Rate 8-48 kHz 48 kHz
Bitrate 16–320 kbps 128kbps (Stereo)

The following is a list of supported video file formats:

Video File Formats Extension
3GPP Multimedia File .3GP, .3GPP
Advanced Systems Format .ASF
Audio Video Interleave .AVI
Digital Video Express .DIVX
Flash Video File .F4V, .FLV
MPEG-4 Video File .M4V, .MP4
Matroska Multimedia Container .MKV
QuickTime Movie File .MOV
MPEG-2 Video File .MP2
Moving Picutre Experts Group Video .MPEG, .MPG
Windows Media Video .WMV


Audio files, like video files, are transcoded into a low, medium, and high rendition. 

High Rendition Audio Settings

Audio Setting Supported Recommended
Sample Rate 8-48 kHz 48 kHz
Bitrate 16-320 kbps (stereo) 192 kbps (stereo)

Medium Rendition Audio Settings

Audio Setting Supported Recommended
Sample Rate 8-48 kHz 48 kHz
Bitrate 16-320 kbps (stereo) 128 kbps (stereo)

Low Rendition Audio Settings

Audio Setting Supported Recommended
Sample Rate 8-48 kHz 48 kHz
Bitrate 16-320 kbps (stereo) 64 kbps (stereo)

The following is a list of supported audio file formats:

Audio File Formats Extension
Advanced Audio Coding .AAC
AC3 Audio .AC3
Audio Interchange File Format .AIF, .AIFF
MPEG-4 Audio File .MP4, .M4A
MPEG-1/MPEG-2 Audio Layer 3 .MP3
WaveForm Audio File .WAV

Web and Animation Files

Web Page Capture Extension
Web Page Capture (as static images) N/A


Animation File Formats Extension
Flash Animations .SWF

Related Articles

Created on