Need a PNG instead of a BMP? This free converter turns your BMP files into PNG right in your browser — no uploads, no account, and no software to install. Everything below explains how it works, what changes when you convert, and how to get the best result.
How to convert BMP to PNG
- Add your BMP files above — drag and drop, click to browse, or paste. Nothing is uploaded.
- Each file is decoded and re-encoded to PNG on your device, right in the browser.
- Download each PNG individually, or grab the whole batch as a single ZIP.
Why convert BMP to PNG?
BMP is a good fit for legacy Windows images, but it isn’t always the right choice when you need to share, upload, edit, or archive an image. Converting to PNG gives you a file that’s better suited to those jobs.
What you gain with PNG:
- Lossless quality
- Transparency support
- Universal compatibility
File sizes depend on the image and the settings you choose.
BMP vs PNG at a glance
| BMP | PNG | |
|---|---|---|
| Compression | Lossless | Lossless |
| Transparency | No | Yes |
| Animation | No | No |
| Best for | Legacy Windows images | Graphics, screenshots, logos, and editing |
What is Bitmap (.bmp)?
BMP (Bitmap) is an uncompressed Windows image format from the early days of the PC. It stores raw pixel data with little or no compression, which keeps it dead simple but makes the files very large.
A BMP records each pixel’s color more or less directly, so the image is perfectly lossless but far larger than a PNG or JPG of the same picture. The common variants carry no transparency at all.
What is Portable Network Graphics (.png)?
PNG (Portable Network Graphics) is a lossless format built for the web and for graphics work. It records every pixel exactly, supports clean transparency, and opens everywhere JPG does.
PNG uses DEFLATE, a lossless compression algorithm, so re-saving never degrades the image. It supports a full 8-bit alpha channel for smooth transparency and up to 24-bit color, which is why it is the go-to for anything with sharp edges or text.
When PNG is the right choice
PNG is a strong pick for:
- Logos, icons, and graphics
- Screenshots
- Images that need transparency
- Editing and long-term archiving
Quality and file size
PNG is lossless, so it reproduces the decoded image pixel-for-pixel with no compression artifacts. That fidelity is ideal for graphics, text, and archiving. File sizes depend on the image and the settings you choose. Need a specific file size instead? Try our compress-image tool.
Is it private?
Yes. Everything runs locally in your browser, so your BMP files are never intentionally sent to a server. Read more on our privacy page, or see whether converting images online is safe.
Frequently asked questions
Is this BMP to PNG converter free?
Yes. It’s completely free with no signup, no watermarks, and no per-file limits beyond sensible batch caps that keep your browser responsive.
Are my BMP files uploaded to a server?
No. Conversion happens entirely in your browser using WebAssembly and your device’s own image tools, so your files are never intentionally sent to a server.
Does converting BMP to PNG reduce quality?
PNG is a lossless format, so every pixel from the decoded image is preserved exactly — there’s no visible quality loss.
Will converting to PNG keep transparency?
PNG supports transparency, but BMP images are fully opaque to begin with — so there’s nothing to lose, and your converted files stay opaque.
Can I convert multiple BMP files at once?
Yes. Add up to 50 files per batch, convert them together, and download them individually or as a single ZIP.
Does the BMP to PNG converter work on a phone?
Yes. It runs in any modern browser — Chrome, Edge, Firefox, and Safari — on Windows, macOS, Android, and iPhone or iPad. Because it works on-device, you can convert straight from your phone’s photo library.
Is there a file size limit?
You can convert files up to 100 MB each. Because everything runs in your browser, very large files depend on your device’s available memory.
