Convert BMP to JPG Online — Free
Convert BMP to JPG online — turn uncompressed Windows bitmap files into compact, shareable JPGs. Free, browser-based, no signup required.
Direct converter coming soon
Use Image Compressor with BMP input and JPG-equivalent settings.
Open Image Compressor →How to convert BMP to JPG
- 1
Add your BMP file
Drop or select a .bmp file. Files up to 50MB process locally in your browser — nothing uploaded.
- 2
Run the conversion
Your BMP is loaded via the browser's native BMP decoder (included in every modern browser since 2010), rendered onto a Canvas, and exported as JPG at your chosen quality. BMP's uncompressed pixel grid transfers directly; JPG's lossy DCT encoding shrinks the file dramatically.
- 3
Download your JPG
One click saves the result as a .jpg file. Your original file stays on your device.
Why convert BMP to JPG?
BMP files store pixel data uncompressed and can be 10-100× larger than the same image as JPG. Converting slashes file size — a 50MB scanned document becomes a 400 KB JPG with imperceptible quality loss. BMP is a legacy Windows format rarely seen today; JPG is the universal standard for sharing and archiving.
Common BMP to JPG use cases
- Shrinking scanned documents from an older Windows-based scanner or fax application that outputs BMP
- Converting screenshots from legacy Windows utilities (MS Paint default save in Windows XP, some kiosk software)
- Migrating an archive of BMP assets from a decade-old Windows system to cloud storage with 100× less space
- Preparing BMP exports from industrial or medical imaging software for sharing via email or cloud
What file size to expect
A 1920×1080 uncompressed 24-bit BMP is exactly 6.22 MB (calculated as 1920 × 1080 × 3 bytes + header). The same image as JPG at quality 92 is typically 180-400 KB — about 15-30× smaller. Larger BMPs (scans, medical images) often hit 50-100 MB and shrink to 500 KB-2 MB as JPG.
Technical notes: BMP → JPG
BMP is essentially a raw pixel dump with a small header: no compression, no color profile handling in most variants, and support for 1/4/8/16/24/32 bits per pixel (BGR channel order, not RGB). The browser's BMP decoder handles all common variants. JPG encoding uses DCT with 4:2:0 chroma subsampling at standard quality settings. BMP's optional alpha channel (BITMAPV4/V5 headers) is preserved into the Canvas but flattened to white when encoded as JPG.
Compatibility and browser support
BMP input works in every modern browser — Chrome, Firefox, Safari, and Edge have decoded BMP since at least 2015. JPG output is universally supported. The only edge cases are rare BMP variants (RLE-compressed 4-bit or 8-bit BMPs from Windows 3.x) which some browsers may reject.
BMP vs JPG
| BMP | JPG | |
|---|---|---|
| File size | Very large (uncompressed) | Smaller (lossy) |
| Quality | Lossless | Lossy (adjustable) |
| Transparency | Limited (some variants) | No |
| Browser / app support | Universal but rarely used | Universal |
| Best for | Legacy Windows applications | Photographs, web images, sharing |
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Frequently Asked Questions
How much smaller will the JPG be?
Typically 20-100× smaller. A 6 MB 1080p BMP often becomes a 300 KB JPG; a 50 MB scan becomes a 500 KB JPG.
Will quality drop noticeably?
For photos and scans, no — JPG quality 92 is visually indistinguishable from the source. For line art or graphics with hard edges, bump quality to 95+ or consider PNG instead.
Does this work in the browser?
Yes — BMP is natively decoded in every modern browser. Very old RLE-compressed BMP variants (Windows 3.x) may fail; the common 24/32-bit BMPs all work.
What about 32-bit BMPs with alpha?
The alpha channel is preserved in the Canvas but JPG has no alpha — transparent pixels are filled with white before encoding.
Can I convert really big BMPs?
Up to 50MB per file. Larger scans may need to be downsampled first — the browser's image decoder has memory limits that vary by device.
Will colors shift?
BMP's BGR channel order is converted to RGB during decoding. Colors are preserved; any embedded ICC profile in rare BMP variants (V5 header) is dropped.