Why convert TN3 to BMP?
.tn3 is an obsolete Atari ST high-resolution bitmap with no native support in modern software. .bmp is a simple, lossless, uncompressed format supported by virtually every Windows application, making it a practical target when a downstream tool requires BMP input specifically.
How to convert TN3 to BMP
XnView MP FREE
Enable 'Show all graphic formats' in Settings > General, open the .tn3 file, then go to File > Export, choose BMP as the output format, and click OK.
RECOIL OPEN-SOURCE
Run recoil2png yourfile.tn3 to produce a PNG, then open the PNG in any image editor and save as BMP. RECOIL does not export BMP directly.
About these formats
.TN3
Tiny High-Resolution Image (Atari ST)
A TN3 file is a "Tiny" compressed bitmap from the Atari ST computer - the high-resolution monochrome variant (640x400, black-and-white). To open one today, use RECOIL or XnView MP, both…
Open .TN3 details →
.BMP
Windows Bitmap Image
A BMP file is a Windows Bitmap - a simple, usually uncompressed raster image developed by Microsoft. Every major OS and image viewer opens it with no extra software (double-click works).…
Open .BMP details →Quality & what to watch
- TN3 is always 1-bit monochrome (640x400). The output BMP will be a black-and-white bitmap - there is no color information in the source file.
- No quality is lost. Both TN3 and BMP are lossless; the decoded pixel data is preserved exactly.
- BMP uses no compression, so the output file will be larger than an equivalent PNG. For archiving, PNG is more efficient.
Frequently asked questions
Can RECOIL export BMP directly?
recoil2png tool outputs PNG only. Open the exported PNG in any image editor to save as BMP if needed.
