How to Convert BMP to PNG Online
BMP files are huge because they store every pixel uncompressed. This free BMP to PNG converter turns them into compact, lossless PNG images that look identical but take far less space — and it runs entirely in your browser, so your files are never uploaded.
Add your BMP files
Drop one or several bitmaps, or click to browse. Each is added to the list.
Convert to PNG
Click Convert. Each bitmap is turned into a lossless PNG right on your device.
Download your PNGs
Save each image, or grab them all as a ZIP. Your originals stay untouched.
BMP vs PNG
PNG is far smaller
PNG compresses without losing a single pixel, so it's typically a fraction of a BMP's size.
Still lossless
Like BMP, PNG keeps every detail exactly — you lose size, not quality.
Supports transparency
PNG can store transparent pixels, which plain BMP cannot.
Works everywhere
PNG opens in every browser, app and website, while BMP is often unsupported online.
Great for graphics
Screenshots, logos, icons and line art stay crisp and clean as PNG.
Runs in your browser
Conversion happens on your device and nothing is uploaded, so it's private and instant.
Free and 100% Private
This converter is genuinely free and genuinely private. There is no account and no daily cap — and because your bitmaps are converted right in your browser, they never leave your device. Nothing is uploaded, stored or seen by anyone, and your PNGs carry no watermark.
Want a smaller photo format instead? Use BMP to JPG. Need an even lighter web image? Try PNG to WebP, or shrink further with Compress Image.
BMP to PNG on Any Device
How to convert BMP to PNG on Windows
Open this page in any browser, add your BMP, and click Convert. You get a compact PNG to save — no software needed.
How to convert BMP to PNG on Mac
Open the page in Safari or Chrome, add the bitmap, convert, and download the PNG. Everything runs locally.
How to convert BMP to PNG on iPhone or Android
Open this page in your phone's browser, pick the BMP from Files, convert, and save the PNG.
How to make a BMP smaller
Converting to PNG usually shrinks it a lot while keeping every pixel. For photos, BMP to JPG can be even smaller.
How to convert many BMP files at once
Drop several bitmaps together, convert them all, then use Download all as ZIP to save the batch.
How to convert a .dib file to PNG
DIB is the same as BMP — just add the .dib file here and convert it to PNG the same way.
Frequently Asked Questions
How do I convert BMP to PNG for free?
Add one or more BMP files above and click Convert. Each becomes a lossless PNG — completely free, with no signup and no watermark.
Are my bitmaps uploaded to a server?
No. Conversion happens right inside your browser, so your files never leave your device. Nothing is uploaded, stored or seen by anyone.
Is PNG lossless like BMP?
Yes. PNG keeps every pixel exactly, so you get the same image at a much smaller size.
How much smaller will the PNG be?
It depends on the image, but PNG is usually a fraction of a BMP's size since BMP stores pixels uncompressed.
Does PNG keep transparency?
Yes. PNG supports transparent pixels, which plain BMP does not.
Can I convert several BMP files at once?
Yes. Add multiple bitmaps, convert them together, and download them all as a single ZIP.
Does it support .dib files?
Yes. DIB is essentially the same format as BMP, so it converts the same way.
Is there a file size limit?
There is no fixed limit. Very large bitmaps just take a moment longer since everything runs on your device.
Does it work on mobile?
Yes. It runs in any mobile browser on iPhone and Android — add your BMP and save the PNG.
Do I need to install anything?
No. It works in your web browser on any device with nothing to download or install.
Is this BMP to PNG tool really free?
Completely free, with no account, no watermark, no limit and no premium wall.
100% private — your bitmaps are converted right here in your browser and never uploaded to any server.
Last updated: July 2026 · FlipMyFormat BMP to PNG Converter
Written and maintained by the FlipMyFormat team