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Format Types
| Extension | Type | Notes |
|---|---|---|
| jpg, jpeg | Image | Compressed images that are usually photographs. |
| gif | Image | Typically cartoonish or images with a limited number of colors. A popular format at one time, but it is being phased out slowly. |
| png | Image | Designed to replace the "gif" because Unisys irritated programmers about a software patent. A good format to pick for your phone or web site. Better compression for cartoons and animations. |
| wbmp | Image | Wireless BMP files. Not the same as a Windows BMP file. A Windows BMP file can be converted into a wbmp file with WapTiger's bmp2wbmp utility, or you can use their online form. This is a black and white format only. |
| pmd | Media | These are animations, screen savers, or little movies. To create them, you need either KTPIC or auAM. Information about KTPIC is on Craig Given's site. Another alternative is called CMX files (Quallcomm CMS [Compact Media Extensions]). You can get more information on the format and read a FAQ on this type of file. |
| mp4 | Media | Compressed video. Newer phones support this format. |
| mid, midi | Music | These are small sound files. It is basicllay "sheet music" that your phone translates into a song. Most often, these are used as polyphonic ring tones. AnvilStudio is free and edits midi files. |
| qcp | Audio | Highly compressed audio format. You can compress any sound instead of having just specific instruments. The format is made by Qualcomm PureVoice (info) and you can convert wav files into qcp format with their converter. |
| mp3 | Audio | Compressed music, and a very common format for music that can be found online. If your phone supports the mp3 format, you may want to make it mono and set the bitrate to low in order to keep the size down. Many phones currently don't support this format. |
| m4a | Audio | Compressed audio layer from an mp4 file. |
| mmf | Audio | Another version of compressed music. |
| 3gp | Media | Text, compressed audio, and/or compressed video, specially designed for use with mobile phones. Explained a bit by RFC 3839. |
| amr | Audio | Compressed mono audio for GSM networks |
| aac | Audio | Low bitrate mp4 clips of music. Not all phones support this format. |
| jar | Application | Java midlet program. This is the compiled Java program. Many games and other applications are made into Java midlets. |
| jad | App Desc | Java midlet descriptor. This gives information about the Java program, such as which category the program should go into, the midlet's name, and who made it. Most of the same information is already in the Manifest file in the java archive (the .jar file). This uploader does not require this file. |