Free BMP to PNG converter online
Need a PNG instead of a BMP? This free converter turns BMP files into PNG images right in your browser. Add as many files as you like, adjust the settings and download the results individually or together as a ZIP.
BMP is an uncompressed bitmap format from early Windows. Because it stores every pixel raw, BMP files are enormous (a 12 megapixel photo is about 36 MB) but they are trivially simple, so old software, microcontrollers, label printers and some games still require them.
PNG is a lossless format: it never throws image data away, so text and sharp edges stay crisp and it supports full transparency. The trade-off is file size: a photo saved as PNG is often 5 to 10 times bigger than the same photo as JPG. PNG files can hold hidden text chunks with software names, authors and dates.
About BMP and PNG files
New to these formats? These pages explain what each one is for and how to open it on Windows, Mac, iPhone and Android.
Why convert BMP to PNG?
- PNG is lossless and supports transparency, which makes it the safest format for editing, screenshots and graphics with text.
How to convert BMP to PNG
- Click the upload box or drag and drop your BMP files (you can select several at once).
- Conversion to PNG starts automatically. Change the options if you like.
- Download each PNG file or click 'Download all' for a ZIP.
Features
- Batch conversionConvert hundreds of BMP files at once.
- No uploadFiles never leave your device, so it is fast and private.
- Strips metadataThe PNG files contain no EXIF or GPS data.
- Any deviceWorks on iPhone, Android, Windows, Mac and Chromebook.
BMP vs PNG: what's the difference?
| Feature | BMP | PNG |
|---|---|---|
| Full name | Bitmap Image File | Portable Network Graphics |
| Released | 1990 | 1996 |
| Compression | None (uncompressed) | Lossless |
| Transparency | Rarely supported | Yes (full alpha) |
| Animation | No | APNG only |
| Typical file size | Huge | Large |
| Best for | legacy Windows software, embedded devices and some printers | screenshots, logos, graphics with text and anything that needs a transparent background |
| Compatibility | Windows apps and most editors; inefficient for the web | Universal: every browser, OS and editor |
| File extensions | .bmp, .dib | .png |
| MIME type | image/bmp | image/png |
Frequently asked questions
How do I convert BMP to PNG?
Open this page, add your BMP files, and FileStripe converts them to PNG in your browser. Then download the files one by one or as a ZIP. It takes a few seconds and you don't need to install anything.
Will converting BMP to PNG reduce quality?
No further quality is lost. PNG is lossless, so the PNG file looks exactly like the decoded BMP.
Can I convert multiple BMP files to PNG at once?
Yes. Select or drop as many BMP files as you like; there is no limit on the number or size of files.
Is the BMP to PNG free?
Yes. The BMP to PNG is completely free with no sign-up, no watermarks, no daily limits and no premium tier.
Are my files uploaded to a server?
No. FileStripe processes your files locally in your web browser using JavaScript. Nothing is uploaded, so the BMP to PNG is safe for private photos and confidential documents and even works offline once the page has loaded.
Does it work on iPhone and Android?
Yes. The BMP to PNG works in Safari, Chrome, Firefox, Edge and Samsung Internet on phones, tablets and computers. On a phone you can pick files from your photo library or files app and share the result straight to another app.
Last updated · Processing happens locally in your browser.