BMP to JPG
Compress large bitmaps into JPG photos.
Drop BMP images here, or click to browse
Several files at once, up to 25 MB each. Converted to JPG in your browser — nothing is uploaded.
JPG options
Quality: 92%
BMP to JPG Converter
Bitmaps are huge because they are uncompressed. This converter turns .bmp files into compact JPEG images right in your browser, with a quality slider so you decide the balance between size and detail. Drop several files to convert them in one go — they never leave your device.
When BMP to JPG is the right choice
JPEG was designed for photographs: it splits the image into 8×8 blocks, transforms them into frequencies, and stores fine detail with less precision where the eye won't notice. For photos and scans that makes files tiny with little visible change. Convert bitmaps to JPG when:
- Old digital photos or scans were saved as BMP by early cameras, scanners, or software.
- You need to email or upload pictures and the bitmap exceeds the size limit.
- A website or app rejects BMP, which is common for profile pictures and listings.
- You are cleaning up disk space in an archive of photo bitmaps.
Picking a quality value
Start at the default 92% and look at the size chip under the preview. For web use, 80–85% is usually indistinguishable on screen. Go higher for prints or if you'll edit the image later. Below 70%, blocky artifacts start to appear in smooth areas such as skies.
Transparency and palettes
Most bitmaps are 24-bit and fully opaque, so nothing changes. If you convert a 32-bit bitmap with an alpha channel, transparent areas are filled with the background color you choose. Palette-based 8-bit and 4-bit bitmaps are expanded to full color before encoding, so they convert correctly too.
For lossless results — especially with screenshots and line art — use BMP to PNG instead. To turn a JPG back into a bitmap, see JPG to BMP.
Frequently Asked Questions
How much smaller will the JPG be?
For photos, a JPG at 85–90% quality is usually 10–30 times smaller than a 24-bit bitmap. A 6 MB bitmap often ends up between 200 and 600 KB.
Should I use JPG or PNG for my bitmap?
Use JPG for photographs and scanned pictures. Use PNG for screenshots, diagrams, and anything with text or sharp edges, because JPG adds visible artifacts around them.
What happens with a 32-bit bitmap that has transparency?
Transparent pixels are blended onto the background color you select before the JPG is encoded, because JPEG has no alpha channel.