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|Description||Files with a .key.zip file extension are presentation documents which are generated by Apple's "Keynote" application in versions 1.0, 2.0, 3.0 and 4.0 (these versions of the software were released between 2003-2007). Technically speaking the files produced are packages, but since it is not possible to upload a package to a web service (as they are multiple files) Zamzar recommends compressing them into a ZIP file before upload.
The key.zip format is distinct from the key file produced by more modern versions of iWork which is a single file (and so does not need to be compressed).
Keynote is one of 3 programs which make up Apple's iWork office suite, a set of applications which run on the Mac OS X and iOS operating systems, also including Numbers (for spreadsheets) and Pages (for word processing).
Keynote was first released by Apple in January 2003 and began life as a program used by Steve Jobs when creating presentations for the MacWorld Conference and Expo.
|Actions||KEY.ZIP to JPG - Convert file now
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|Technical Details||Official file format specifications for iWork '05-'08 Keynote files are not published by Apple but there have been attempts by some developers to reverse engineer them.
Files created by Keynote in iWork '05 - '08 are not compatibile with the most recent versions of iWork. In general Keynote files cannot be opened by programs other than iWork.
|Associated programs||Apple iWork '05
Apple iWork '08
|Developed by||Apple Inc|
|Useful links||iWork 05 programming guide
Keynote details on Wikipedia
Information on iWork Keynote mime formats
More information from Apple on iWork
|Description||JPG's are often used for web sites and email as they are generally smaller file sizes as they are lossy meaning that some image quality is lost when the JPG is compressed and saved. The resultant 'lossy' file means that quality can never be recovered. The JPG format is often used in digital camera memory cards. The JPG file is a great format as it often manages to compress files to 1/10 of the size of the original file which is especially good for saving on bandwidth.|
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|Technical Details||JPG is a graphical file format for editing still images, it offers a symmetrical compression technique which is processor intensive and time consiming in both compression and decompression. JPEG is a joint standard of the International Telecommunications Union (ITU-T T.81) and the International Organization for Standardization (ISO 10918-1). JPEG involves a lossy compression mechanism using discrete cosine transform (DCT). Compression rates of 100:1 can be achieved, although the loss is noticeable at that level. Compression rates of 10:1 or 20:1 yield little degradation in image quality.|
|Associated programs||Adobe Photoshop
Corel Paint Shop Pro
Microsoft Windows Photo Gallery Viewer
|Developed by||The JPEG Committee|
|Useful links||More detailed information on JPG files
Choosing the best way to compress a JPG file
Convert KEY.ZIP file
- key.zip to html (Hypertext Markup Language)
- key.zip to jpg (JPEG compliant image)
- key.zip to key09 (Apple iWork '09 Keynote Document)
- key.zip to mov (Apple QuickTime Movie)
- key.zip to pdf (Portable Document Format)
- key.zip to png (Portable Network Graphic)
- key.zip to ppt (Microsoft PowerPoint Presentation)
- key.zip to pptx (Microsoft PowerPoint 2007 Presentation)
- key.zip to tiff (Tagged image file format)