Convert BMP to PNG online with every pixel kept, at a fraction of the file size. Upload files up to 20GB and download the converted result in a few clicks.
Drag & Drop your BMP file here
BMP files, up to 20GB
Files stay private.
Automatically deleted after 24 hours.
Link
20GB upload limit.
4.8/5
Trusted for 1,826,856+ conversions
HOW IT WORKS
Three steps, no account, nothing to install.
01
Upload your BMP files
Drag in .bmp images from Paint, a scanner, old software or a device export.
02
Convert to PNG
Start the conversion. Every pixel is copied into a losslessly compressed PNG.
03
Download the PNG
Download each PNG, or several together as one ZIP.
BMP
BMP is Windows' original bitmap format, usually uncompressed, so files are large but simple to read.
PNG
PNG is a lossless image format with full transparency support, the usual choice for graphics, screenshots and editing copies.
FILE FORMATS
SOURCE
Microsoft's bitmap format dates back to early Windows and OS/2. Most BMPs store pixels uncompressed, row by row, which makes them easy for any program to read and very large. A 12 MP photo as BMP is around 36 MB. Paint, older Windows software, scanners and embedded devices still produce it.
TARGET
PNG stores every pixel exactly, so re-saving never degrades it. It supports full alpha transparency and 8 or 16 bits per channel, which makes it the standard for logos, UI graphics, screenshots and images that will be edited again. Photos as PNG are much larger than the same photo as JPG.
| Feature | BMP | PNG |
|---|---|---|
| Developed by | Microsoft | PNG Development Group (W3C) |
| File extension | .bmp | .png |
| Compression | None (optional RLE) | Lossless |
| Transparency | Rarely (32-bit only) | Yes, full alpha |
| Color depth | 1 to 32-bit | 8 or 16-bit per channel |
| Best for | Legacy Windows software | Graphics, screenshots, editing copies |
| Opens in browsers and phones | Yes, most browsers | Yes, everywhere |
USE CASES
When you want the same pixels in a smaller, web-ready file.
Shrink large bitmaps
PNG compresses without loss, so a BMP often shrinks dramatically.
Upload Paint images to the web
Websites and forums accept PNG; many reject BMP.
Keep screenshots pixel-perfect
Old screenshot tools saved BMP. PNG keeps every pixel.
Share scans from old scanners
Scanner software often saved BMP. PNG is smaller and universal.
Prepare pixel art
PNG keeps hard edges and exact colors.
Convert embedded-device screenshots
Industrial and medical devices often export BMP.
Add images to documentation
PNG works in wikis, Markdown and help centers.
Archive old Windows graphics
Keep the same pixels in a smaller format.
Use bitmaps in design tools
Figma and Canva prefer PNG.
Prepare game sprites
Old game sprites in BMP become PNG for modern engines.
SUPPORTED FILES
BMP files of any common bit depth are supported.
Standard color bitmaps from Paint and most software.
Transparency is kept when the BMP's header declares an alpha mask.
Palette-based and monochrome bitmaps.
RLE-compressed bitmaps are decoded.
Upload several BMPs and download the PNGs as a ZIP.
TROUBLESHOOTING
These explain the few differences you might see.
01
Many 32-bit BMPs carry an unused fourth channel. Transparency is kept only when the header declares an alpha mask, matching how Windows shows the file.
02
That app may read BMP row order incorrectly. The PNG is stored the right way up.
03
Photos and noisy scans compress less. For photos, use our BMP to JPG converter.
04
Some viewers apply color profiles differently. The pixel values are the same.
05
A damaged or non-standard BMP can't be decoded. Save it again from the source app.
06
Check the file is really a BMP and not a renamed format.
Photoshop, GIMP, Preview and Paint can re-save images once installed. dragdropdo converts BMP to PNG in the browser, on any device.
| What matters | dragdropdo | Desktop Image Editors |
|---|---|---|
| Nothing to install | ✓Yes. Runs in any modern browser. | ~Yes, unless the app came with your computer. |
| Works on phones and tablets | ✓Yes. Desktop, Android, iPhone and iPad. | ~Phone editors rarely export other formats. |
| Batch conversion | ✓Yes. Add many files and download one ZIP. | ~Photoshop actions and GIMP scripts can; most apps go one image at a time. |
| Share finished files | ✓Yes. Send a unique link from the result page. | ~You upload and share the files yourself. |
| Pricing | ✓Free with daily limits. $2.99 or $6.99 passes for unlimited use, no monthly plan. | ~Free (GIMP, Preview, Paint) to subscription (Photoshop). |
| Resizing and editing | ✓Not in the converter. The image is converted as it is. | ~Yes. Full editing tools. |
Other tools use different pricing, limits and workflows. This comparison describes dragdropdo's own features without assuming every other tool works the same way.
1.8M+
Files converted
and counting
4.8
Average rating
from our users
~4s
Avg. conversion
per image
0
Files kept
Auto-delete in 24h
WHY DRAGDROPDO
Convert BMP to PNG in your browser, with nothing to install and nothing kept after 24 hours.
Private by default
Files are encrypted in transit and deleted from our servers automatically after 24 hours.
No install required
Convert in any modern browser on Windows, Mac, Linux, Android, iPhone or iPad. No app and no sign-up wall.
Big files and batches
Upload files up to 20GB each, add several at once, and download the results one by one or as a ZIP.
Share & download
Save finished files to your device or pass them on with a share link from the result page.
MORE BMP TOOLS
BMP (Bitmap Image File) is a raster graphics image file format known for its simple structure and high-quality images. It supports various color depths and is widely used in digital imaging. BMP files are uncompressed, ensuring excellent quality but larger file sizes. Ideal for applications requiring detailed visuals, BMP is a staple in the graphic design and photography industries.
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FAQ
Answers to common questions about dragdropdo's BMP to PNG converter.
