.TN3 File Extension
Tiny High-resolution Image
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What is a TN3 file?
A TN3 file is a bitmap image used by Atari ST computers, which Atari released in the late 1980s and early 1990s. It contains an RLE-compressed image that may or may not be animated. If the image is animated, the TNE3 file contains multiple bitmap frames and the animation sequence's speed and duration.
The TN3 format is one of several Tiny image formats used by Atari ST computers. Tiny images are also stored in low-resolution (.TN1 files) and medium-resolution (.TN2 files) formats. They may also be saved with the .TNY extension.
Developer David Mumper developed a Tiny format conversion utility, named Tiny Stuff, and image viewer, named Tiny View. For this reason, the Tiny format is also sometimes called the Tiny Stuff format.
How to open a TN3 file
You can open a TN3 file in XnViewMP (cross-platform), Logipole Knovertor (Windows), and RECOIL (cross-platform). For example, you can use the web version of RECOIL (linked below) to quickly open and view the image a TN3 file contains in your web browser. To open a TN3 file in XnViewMP, you must allow the program to show all graphic formats (Settings → General → Show all graphic formats).