How to Convert BMP to JPG

To convert a BMP to JPG, open BMP to JPG, add your file, and download the result - the conversion runs in your browser in a second or two, and the BMP never leaves your device. The reason to bother is size. A photo saved as BMP can be several times larger than the exact same picture as a JPG, so a stray bitmap tends to arrive as a problem: too big to email, rejected by an upload form, or quietly eating space in a folder of scans.

Here is the whole process, what the conversion changes and what it leaves alone, and the one case where JPG is the wrong thing to convert to.

Convert a BMP to JPG

You need nothing installed and no account - any current browser will do. The tool accepts BMP files only, so this is the page for a .bmp specifically rather than a general converter.

1. Open BMP to JPG. The whole converter loads up front; there is nothing to sign up for.
2. Add your files. Drop in a single .bmp or a whole folder of them, up to 50 at once. Each is converted on its own.
3. Set the quality slider if you want to. It runs from 0.4 to 1 and defaults to 0.92. For photographs and scans you can leave it there; lower it only when you specifically need a smaller file and can accept softer detail.
4. Click Convert to JPG and download. A single file comes back as yourname.jpg; convert several and they are bundled into one zip.

What changes, and what stays the same

The picture's dimensions do not change. The converter re-encodes the pixels; it does not resize them, so a 3000 x 2000 BMP comes out a 3000 x 2000 JPG. What drops is the file size, because JPG stores those same pixels far more efficiently than an uncompressed bitmap does. If you also need fewer pixels - a smaller image on screen, not just a smaller file - Resize Image takes the BMP directly and is the better first step.

One honest note on quality: JPG is lossy, even at the top of the slider. Setting quality to 1 gives you the least compression the format allows, not a lossless copy - JPEG always re-encodes. Coming from an uncompressed BMP at the 0.92 default, that loss is invisible on an ordinary photo, which is exactly why the default sits where it does.

Transparency rarely comes up with BMP, but on the odd file that carries an alpha channel, the converter fills those areas with white before drawing, and that fill is not adjustable. For a cut-out you need to keep transparent, JPG is the wrong target - and since nothing on this site converts BMP to PNG, that particular job belongs in a desktop editor.

When JPG is the wrong target

Convert to JPG for photographs and scanned pages; reach for something else for flat graphics. Screenshots, diagrams, line art, and anything with hard edges or text get softened by JPG's compression, with faint fuzz around the sharp parts. PNG handles those cleanly, but this tool only outputs JPG, so a screenshot-heavy BMP is a case to note rather than force through.

And if you only need to see what is in the BMP, you may not need to convert at all: every major browser opens a .bmp natively. Our guide on opening a BMP file anywhere covers that shortcut, and when converting really is the fix.

After you have a JPG

A converted photo at 0.92 is deliberately on the generous side, so there is usually more to save. If it is headed for an email or a web page, Compress JPG will take a good deal more off it, and when a form sets a hard limit, Compress Image to 100KB targets the number directly instead of leaving you to guess at a quality setting. For where that quality line actually sits, our JPG compression guide walks through it.

FAQ

Does converting to JPG change the image's dimensions?
No. The width and height stay exactly the same; only the file size drops. If you want fewer pixels as well, resize the image separately - Resize Image accepts the BMP directly.

Can I convert a folder of scanned BMP files at once?
Yes. Add up to 50 files and each is converted independently; when there is more than one, they download together as a single zip.

What quality should I pick for scanned documents?
The 0.92 default is a safe choice - on a scan of text or a photo it looks the same as the source. Drop it only if you need a smaller file and can live with slightly softer detail.

Is my BMP uploaded anywhere?
No. The file is decoded and re-encoded with your browser's own Canvas engine, so it never leaves your device.