BMP to PNG
Convert BMP to lossless PNG with transparency preserved. Free, browser-based, no upload.
Convert BMP to PNG entirely in your browser. The file is decoded and re-encoded on your own device using the browser's built-in image engine, so it is never uploaded to a server — useful for private screenshots, ID scans, or client work you would rather not send anywhere. There is no signup, no watermark, and no file-size limit beyond your device's memory.
BMP is an old uncompressed bitmap format with very large files. PNG is lossless and supports transparency — best for graphics, logos, and screenshots.
Drop a BMP image to convert to PNG
Processed in your browser — nothing uploads
🔒 100% Browser-Based
Your image is processed entirely in your browser. Nothing is uploaded. Verify in DevTools → Network tab — zero outbound traffic with file content.
About BMP to PNG
Convert BMP images to PNG right in your browser — no upload, no signup, no watermark. BMP is an old uncompressed bitmap format with very large files. PNG is lossless and supports transparency — best for graphics, logos, and screenshots. Your file is processed locally and never leaves your device.
How to use the BMP to PNG
- 1
Add your BMP file
Drag your BMP image onto the tool or click to browse. It loads locally in your browser; nothing is sent to a server.
- 2
Convert to PNG
Click Convert. PNG is lossless, so there is nothing to configure — the output keeps every pixel of the original.
- 3
Check the result
Compare the new PNG file size against the original BMP. Re-run at a different setting if you want to trade a little quality for a smaller file.
- 4
Download
Save the PNG to your device. Your original BMP is untouched, so you can always convert again with different settings.
BMP vs PNG: what changes
BMP: BMP is an old uncompressed bitmap format with very large files.
PNG: PNG is lossless and supports transparency — best for graphics, logos, and screenshots.
PNG is lossless, so the converted file matches the source pixel-for-pixel — there is no quality slider and nothing is discarded.
Why convert in your browser
Most online converters upload your image to a remote server, process it there, and send it back — which means your file sits on someone else's machine. This tool runs the whole conversion locally in your browser tab, so the image never leaves your device. There is no upload wait, no per-file size cap, and sensitive images stay private. Once the page has loaded, it even works offline.
Quick tips
- ✓Keep your original BMP. Converting does not delete it, and you may want to re-export at a different quality later.
- ✓Converting a photo to PNG will not shrink it — PNG is lossless and best for graphics, logos, and screenshots. For a smaller photo, convert to JPG or WebP instead.
- ✓PNG is a good fit when you need transparency or pixel-perfect graphics.
- ✓Converting does not change the pixel dimensions — only the format and file size. Use a resize tool first if you also need the image smaller.
- ✓Browser-based conversion usually strips EXIF metadata like GPS and camera info, which is often a privacy plus when sharing photos.
Frequently asked questions
How do I convert BMP to PNG?
Drop your BMP file onto the tool above, click Convert, then download the PNG. It all happens in your browser — nothing is uploaded.
Is converting BMP to PNG free?
Yes — completely free, with no signup, no watermark, and no file limits.
Will the PNG lose quality?
No — PNG is lossless, so the PNG matches the source exactly.