BMP to JPG converter
Turn your BMP into a JPG. JPG is the usual choice for photographs on the web and in email. One thing to know first: anything see-through in the BMP comes out on a solid background, white unless you choose another colour. Your file never leaves your computer.
Need the other direction? Convert JPG to BMP
How to convert BMP to JPG
- 1 Drop your BMP .bmp or .dib file onto the page, or click to browse for it.
- 2 Set the quality, or leave the default, which keeps the file small without anything showing.
- 3 Convert. The work happens on your own machine, so how long it takes depends on your computer and the file.
- 4 Download the JPG, or add more files and do the whole set in one go.
Why convert BMP to JPG
- JPG files come out much smaller, which is the difference between a page that loads straight away and one that keeps people waiting.
- You are sending this somewhere that will not keep a transparent background anyway, so putting it on a solid colour costs you nothing.
- Very small files for photos, at a quality that still looks good.
- Opens instantly on virtually every device ever made.
- Photos straight off a camera, which saves JPG by default.
BMP compared with JPG
How the two formats differ on the things that decide whether a conversion is worth making.
| Property | BMP | JPG |
|---|---|---|
| File extension | .bmp | .jpg |
| Compression | Uncompressed | Lossy |
| Transparency | Yes | No |
| Colour depth | 1, 4, 8, 16, 24 or 32 bits per pixel | 8 bits per channel, 24-bit colour |
| Typical file size | Largest | Smaller |
| Browser support | All current browsers | Every browser |
| Introduced | 1986 | 1992 |
| Developed by | Microsoft | Joint Photographic Experts Group |
| Standard | Proprietary | Open |
Quality and what changes
This is the step where information is discarded, and it cannot be undone by converting back later. JPG throws away detail the eye is least likely to notice, which is invisible at sensible settings and shows as blocking around sharp edges and text when pushed hard. Keep the BMP as your master and treat the JPG as a delivery copy.
- Anything see-through comes out on a solid background, white unless you choose another colour.
- One JPG limitation to keep in mind: detail is thrown away, and each re-save takes a little more.
Questions about BMP to JPG
Will I lose transparency converting BMP to JPG?
Yes. A JPG cannot hold transparency, so anything see-through comes out on a solid colour, white unless you choose another. If the transparency matters, convert to PNG or WebP instead, and only flatten once you know what the image will sit on.
Is my BMP file uploaded anywhere?
No. The whole thing runs inside the browser tab you already have open. Your BMP is read straight from your own disk, converted on your machine and handed back as a JPG. Nothing is sent anywhere, nothing is stored and there is no account.
Is there a file size limit?
There is no server-side limit because no server sees the file. The real ceiling is your device memory, since the input and the output both have to fit in the tab. A few hundred megabytes is usually fine on a desktop machine and considerably less on a phone.
Can I convert several BMP files at once?
Yes. Add as many as you like and they are processed one after another, then offered as separate JPG downloads or as a single ZIP. Speed depends on your own processor rather than on a queue.
Does the converter work offline?
Yes, after the page has loaded once. The engine is cached by the browser, so you can disconnect, reload and keep converting. That falls out of doing the work locally rather than being a separate mode you switch on.