Convert images between JPG, PNG and WebP with genuine re-encoding, custom filenames and batch support.
Convert BMP to JPG
Convert bulky uncompressed BMP bitmaps to compact JPG or PNG. BMP stores every pixel raw, so the saving is usually large.
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How to use BMP to JPG
- Choose your BMP files.
- Choose JPG for photos or PNG for screenshots and graphics.
- Set the quality — 85 is a safe default for JPG.
- Batch several files and download them together as a ZIP.
About this tool
BMP stores pixels raw — a 24-bit bitmap uses three bytes per pixel before anything else is considered — so even a plain screenshot can run to tens of megabytes. Converting to JPG or PNG usually cuts the file down enormously with no visible difference, which makes BMPs practical to email, share or archive.
Recommended settings
Settings we suggest
- PNG stays lossless and still shrinks BMP dramatically, so prefer it for text and diagrams.
- Resize while converting if the bitmap is far larger than you actually need.
Supported formats
Input: BMP. Output: JPG, PNG, WebP.
Input formats
BMP
Output formats
JPGPNGWebP
Quality & file size
Lossy formats (JPEG, WebP, AVIF) trade detail for smaller files as you lower the quality; PNG stays lossless regardless of the slider. The tool always shows the original and result sizes so you can judge the trade-off, and it never recommends a result that is larger than your original as an “optimization”.
Privacy
Every image is decoded, transformed and re-encoded entirely in your browser using the Canvas API and a Web Worker. Files are never uploaded, are not stored in localStorage, and are cleared from memory when you remove them or close the page.
More detail: how we process images, security privacy policy.
Common issues & limitations
- BMP files with unusual bit depths or compression may not decode in every browser.
- JPG output discards transparency; PNG and WebP keep it.
- All processing happens on your device, so the limits protect your own browser rather than a server: 25 MB per file, 20 files per batch, and 40 megapixels per image.
Frequently asked questions
Why are BMP files so large?
BMP normally stores every pixel uncompressed — roughly three bytes per pixel. A 4000 × 3000 bitmap is about 36 MB regardless of how simple the picture is.
How much smaller will the JPG be?
Usually a very large saving, and the reason is arithmetic rather than a measurement: a 24-bit BMP stores three uncompressed bytes for every pixel, so a 12-megapixel bitmap is about 36 MB before anything else is considered. Any lossy JPEG of the same picture is a small fraction of that. The exact result depends on the image and the quality you choose.
Should I pick JPG or PNG?
JPG for photographs and scans. PNG for screenshots, diagrams and anything with sharp text or flat color, where it stays lossless and still compresses well.
Are my images uploaded to a server?
No. Every image is decoded, processed and encoded entirely inside your browser using the Canvas API. The files never leave your device and are discarded when you close the page.