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Convert BMP to PNG Online (Free)
Fastest way to convert BMP images to PNG format. Batch processing supported, 100% private.
JPGPNGWEBPHEIC
⚡ Try with a sample photo
Convert BMP images to PNG format directly in your browser — no upload, no signup, no watermark. BMP-to-PNG is the lossless version of cleanup: PNG keeps every pixel intact (mathematically identical output) but compresses the file dramatically — typically 70–90% smaller than the source BMP. Use this when the source is a screenshot, a UI graphic, or anything where you cannot afford any quality loss but need a modern file size. Drop one file or a whole folder, and the converter produces PNG files you can download immediately.
Why convert BMP to PNG?
BMP-to-PNG is the lossless version of cleanup: PNG keeps every pixel intact (mathematically identical output) but compresses the file dramatically — typically 70–90% smaller than the source BMP. Use this when the source is a screenshot, a UI graphic, or anything where you cannot afford any quality loss but need a modern file size.
About BMP and PNG
BMP is an uncompressed Windows format from the early 1990s — every pixel is stored verbatim, which produces gigantic files. It works in opens in any Windows image viewer, but most modern web platforms and CMSes reject it, and is best suited for almost nothing modern — it's a legacy format you usually want to convert away from. PNG is a lossless format with full alpha transparency support. It works in every modern browser, OS, design tool, and document editor, and is best suited for screenshots, logos, icons, UI mockups, and anything that needs a transparent background.
Quality and file size
Both BMP and PNG are lossless formats, so the conversion is mathematically exact — every pixel value is preserved. What changes is how those pixels are stored: larger than JPG for photos, very small for flat-color graphics, while BMP files are enormous — a 1080p BMP is roughly 6MB even though the same image as PNG is 1MB or less. You get the same visual image in a different (usually smaller) container.
Transparency and backgrounds
PNG supports transparent backgrounds, but BMP doesn't store any transparency information to begin with. The conversion produces a fully opaque PNG — no pixels become transparent automatically. If you need a transparent cutout, run the result through the free background remover afterward.
Privacy: where the conversion happens
The conversion runs entirely in your browser using the built-in canvas encoders. Your BMP files are never uploaded to any server, never stored, and never logged. That matters when you're converting passports, IDs, medical scans, financial documents, or anything else you wouldn't paste into a stranger's web form. Drop in dozens of files at once — there's no per-file count, no quota, and no watermark on the output.
Common ways people use it
Keep lossless quality for further editing
Convert BMP to PNG when you'll be editing the result in a design tool — PNG won't add compression artifacts each time you save.
Clean up an old folder of BMP files
Drag in a folder of legacy BMP files and pull out a zip of small modern PNG files in one pass.
Batch-convert a folder in one pass
Select multiple BMP files and pull out a zip of PNG files. No per-file quota, no signup, no watermark.
Frequently asked questions
How It Works
Professional results in 3 simple steps.
1
Upload
Select your photos or videos. Files processed locally.
2
Process
Our powerful engine optimizes your files instantly.
3
Download
Get your optimized files immediately.