BMP2 to JNG Converter
FileFlip converts BMP2 to JNG entirely inside your browser, using ImageMagick compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert a BMP2 file to JNG?#
- Drop your BMP2 file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to JNG and the conversion starts on its own. FileFlip downloads 14.1 MB of WebAssembly the first time and nothing after that, then runs ImageMagick on your own machine.
- Save the JNG file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting BMP2 to JNG lose quality?#
Yes, once. BMP2 keeps everything and JNG does not, so this is the first time the file meets a lossy encoder. At high quality the difference is hard to see, and it is worth keeping the BMP2 original, because every later re-save of the JNG loses a little more.
Is it safe to convert BMP2 files online?#
Yes, because nothing is uploaded. FileFlip converts BMP2 files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What BMP2 to JNG actually does to the file#
Converting BMP2 to JNG runs on ImageMagick, downloads 14.1 MB of WebAssembly the first time and nothing after that, encodes a lossless source with a lossy encoder for the first time.
| Engine | ImageMagick |
|---|---|
| Conversion path | One step: BMP2 → JNG |
| Downloaded to your browser | 14.1 MB, once, then cached by your browser |
| Quality | Lossy, first generation |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
What is a BMP2 file?#
BMP2 is ImageMagick's name for a Windows bitmap saved with the original 12-byte BITMAPCOREHEADER from 1987's OS/2 1.x, an encoding choice rather than a different file format, so the result is an ordinary uncompressed .bmp using the oldest and most limited header structure.
Choose BMP2 only when a specific legacy OS/2 or early-1990s Windows program requires the old-style bitmap header.
Save as standard BMP or BMP3 for anything opened on a modern system, since BMP2's extra compatibility buys nothing there.
What is a JNG file?#
A JNG file holds a single still image whose colour data is compressed as baseline or progressive JPEG inside the same chunk-based container PNG uses, with an optional PNG- or JPEG-encoded alpha channel for transparency.
There's little reason to create a new JNG file today; the format only makes sense inside an existing MNG animation that already mixes JPEG and PNG frames.
Convert JNG to JPG or PNG for anything meant to display in a browser, since none of the major browsers render JNG natively.
BMP2 to JNG questions people ask#
What is BMP2?
BMP2 is ImageMagick's name for a Windows bitmap written with the original 12-byte BITMAPCOREHEADER from OS/2 1.x, not a separate image format. The file is still a plain, uncompressed .bmp and opens anywhere BMP does.
What's the difference between BMP2 and BMP3?
BMP2 uses the old 12-byte OS/2 1.x header and tops out at 24-bit color with no compression. BMP3 uses the 40-byte BITMAPINFOHEADER that Windows 3.0 introduced, which adds 16-bit and 32-bit pixel formats plus RLE compression, and is the header nearly every modern BMP file actually uses.
Should I use BMP2 for a new project?
No, BMP2 has no advantage on a modern system. Use plain BMP or BMP3 instead, and reach for BMP2 only if a legacy OS/2 or early-1990s Windows application specifically requires that header.
What opens a JNG file?
JNG files open in GIMP, Gwenview and ImageMagick-based tools, but no mainstream web browser renders them. That gap is the main reason JNG never spread beyond the small set of software built around the MNG format.