FreeNo uploadNo sign-upBatch
BMP to PNG Converter
Convert BMP to lossless PNG, transparency included. Runs entirely in your browser.
Drop BMP files here
batch and mixed formats welcome
- Private by design. Converted inside your browser.
- Instant. No upload queue, no waiting.
- Unlimited. Convert hundreds of files, download as ZIP.
How to convert BMP to PNG
Add your BMP files
Drop them on the converter, click Choose files or paste from the clipboard. You can add as many as you like.
Adjust the settings
No settings needed: PNG is lossless and keeps the full resolution.
Download your PNG files
Each file converts automatically. Save files one by one or all at once as a ZIP.
Why convert BMP to PNG?
BMP is the classic Windows image format. It usually stores pixels without compression, which makes files very large.
PNG is lossless and supports transparency, so the result is a pixel-perfect copy that opens in every browser, editor and Office app.
BMP vs PNG
| BMPBitmap image | PNGPortable Network Graphics | |
|---|---|---|
| Type | Raster image | Raster graphic |
| Compression | Usually none | Lossless |
| Transparency | Rare | Full alpha channel |
| Animation | Not supported | APNG only, limited support |
| Support | Windows and most viewers | Every browser and editor |
| Best for | Legacy software and simple tools | Screenshots, logos, UI, images with text or transparency |
Frequently asked questions
Does converting BMP to PNG lose quality?
No extra quality is lost. PNG stores every decoded pixel losslessly. The file may be larger than the original because PNG does not use lossy compression.
Can I convert many BMP files at once?
Yes. Add as many files as you like; each one converts automatically and you can download them all as a ZIP.
How do I open BMP files without converting?
You need software that supports BMP. If you only need to view, share or upload the image, converting it is usually quicker than installing a new program.
Are my files uploaded to a server?
No. formatmath converts files with code that runs inside your browser. Your files are never uploaded, stored or seen by us.
Is it free?
Yes. There is no watermark and no daily limit. An account is optional and only keeps a history of your conversions.