Convert heavy BMP bitmaps into compact JPG files, right in your browser. Nothing is uploaded.
BMP is an old bitmap format that stores an image with little or no compression, which makes the files huge. A single BMP can easily be many times the size of the same picture saved as JPG. That bulk is fine on a local drive from decades ago, but it is painful to email, upload, or store in quantity. Converting to JPG shrinks the file dramatically while keeping the photo looking good.
The tool works by letting you add your BMP files and, if you like, choose a JPG quality level before you download the results. Drag the files in or browse to them, and the compact JPGs come back ready to use. A batch of old bitmaps can go through together, which saves a lot of clicking when you are cleaning out an archive.
The important thing to understand is that JPG uses lossy compression, so it throws away some data your eye is unlikely to miss in order to make the file small. For photographs this is an excellent trade, and at a high quality setting the loss is invisible. For flat graphics with sharp lines or text, JPG can add faint smudging around edges, in which case PNG would be the cleaner target.
Convert BMP to JPG when the image is a photo or screenshot that you need to make portable, which is the common case, since the size reduction is enormous. If the BMP holds a diagram, logo, or anything with crisp edges and few colors, PNG will keep it sharper. So the choice hinges on whether you value the smallest possible photo or perfectly clean lines.
People reach for this to rescue old scanned photos saved as BMP, to slim down screenshots that some program exported as bitmaps, to prepare images for a website where the BMP would load painfully slowly, and to fit more pictures into limited storage or an email attachment.
The conversion happens in your browser, so your images never leave your device and nothing is uploaded. It is free and needs no account. The only genuine limit is your device's memory, and since BMP files start out very large, a big batch is more demanding on an older machine.
BMP stores each pixel with little or no compression, so it keeps every bit of data at the cost of size. Converting to JPG applies smart compression that can shrink the file many times over.
For photographs at a high quality setting the loss is essentially invisible, since JPG discards detail your eye tends not to catch. Images with sharp text or lines can show slight fuzz around edges.
Choose JPG for photos where a small file matters most, and PNG for graphics, screenshots with text, or logos that need crisp edges. The right pick depends on the kind of image.
Yes, add multiple files and download the JPGs together. Because bitmaps are large to begin with, a heavy batch uses a lot of memory on older devices.
JPG has no transparency, so any transparent regions become a solid background. If you need to keep transparency, convert to PNG instead.
It varies with the image and the quality you choose, but the drop is often dramatic because BMP is barely compressed. A high quality JPG can still be a small fraction of the original size.
Polished Pixels. All tools. About. Contact. Every tool runs in your browser and your files are never uploaded.