How to convert BMP to JPG
- 1. Select your BMP filesClick Choose BMP files, drop them onto the box, or paste an image with Ctrl+V. Batches are fine.
- 2. Choose a quality and press ConvertHigh is the default and keeps images looking like the original. Pick a lower setting for even smaller files, then click Convert.
- 3. Download the JPGsEach row shows the old and new size. Download files one at a time or all together with Download all (.zip).
Why BMP files are so big
BMP is the Windows bitmap format. Most BMP files store every pixel's color as raw numbers, with no compression at all. A full-HD screenshot saved as BMP takes several megabytes no matter how simple the picture is.
JPG compresses photos and screenshots by discarding detail your eyes are unlikely to notice. The result is usually a tiny fraction of the BMP's size, small enough for email attachments and upload forms with size limits.
| BMP | JPG | |
|---|---|---|
| Origin | Microsoft Windows | Joint Photographic Experts Group, 1992 |
| Compression | Usually none | Lossy |
| File size | Very large | Small |
| Image quality | Exact pixels | Near-identical at high quality |
| Transparency | Rarely used | Not supported |
| Accepted by websites and email | Often rejected or too big | Almost always |
How much smaller will the JPG be?
Usually a lot, but it depends on the image and your quality choice. Rather than guess, convert and look: after converting, each file shows its original size next to the new one.
High (the default) is a good balance for photos and screenshots. Maximum keeps the most detail if you plan to edit further. Medium and Smallest file are best when you're fighting an upload limit.
When not to convert to JPG
JPG is great for photos but can leave faint smudges around sharp text, thin lines and flat areas of color. If your BMP is a diagram, a screenshot full of text, or pixel art, a PNG keeps it perfectly sharp while still being much smaller than the BMP. In that case, keep the BMP or save it as PNG in an image editor.
Converting BMP to JPG in Windows without a website
- Paint: open the BMP, choose File → Save as → JPEG picture. That works well for one file at a time.
- Mac: open the BMP in Preview, choose File → Export and pick JPEG.
- Many files: converting a folder one by one in Paint gets tedious. Drop them all here instead and convert them in a single batch.
Other formats
Scanned documents often come as TIFF rather than BMP. You can convert TIFF scans to JPG the same way, or put your JPGs into a single PDF once they're converted.
Frequently asked questions
How do I reduce a BMP file's size?
Convert it to JPG. BMP files are usually uncompressed, so the JPG is typically far smaller. Choose Medium or Smallest file if you need it smaller still.
How do I convert BMP to JPG on Windows?
Drop the files on this page in any modern browser and click Convert. For a single image you can also open it in Paint and use Save as → JPEG picture.
Is BMP to JPEG the same as BMP to JPG?
Yes. JPEG and JPG are the same format. The files are saved with the .jpg extension.
Will I lose quality converting BMP to JPG?
A little, because JPG is lossy, but at High or Maximum it's very hard to notice in photos. Sharp text and line art may show slight softening.
Can I convert many BMP files at once?
Yes. Add as many as you want, click Convert once, and save them with Download all (.zip).
Do my images get uploaded?
No. Conversion happens on your device, in your browser, and your images are never uploaded. The page loads its own code, ads and cookieless analytics, but your files stay put. Here's how to confirm it.