BMP → PNG
Convert bitmap BMP images to compact, lossless PNG files in your browser.
Drop files here
or browse from your device
images · audio · video · documents · archives · up to ~500MB
Your first conversion lands here automatically — saved on this device only, never uploaded.
100% Private
Runs in your browser. No upload.
Instant
No queue, no server roundtrip.
Offline-ready
Works after first load.
Switching a BMP image to PNG is usually about where it has to work rather than how it looks: one format is accepted, smaller or sharper in the place the picture is heading. PNG (Portable Network Graphics) earns its place here: lossless quality, an alpha channel for transparency and universal support in every browser and operating system. BMP stores raw, uncompressed pixels. It came from early Windows and still turns up in legacy tools, medical software and embedded systems — always at enormous file sizes.
BMP stores raw, uncompressed pixels. It came from early Windows and still turns up in legacy tools, medical software and embedded systems — always at enormous file sizes.
Converting BMP to PNG re-encodes the picture: dimensions and visible content stay the same, while file size and colour handling follow the PNG encoder. Detail already discarded by earlier lossy compression cannot come back, so PNG preserves what is there rather than restoring what is gone. Transparency survives only if PNG supports an alpha channel.
What you gain with PNG: Lossless quality, an alpha channel for transparency and universal support in every browser and operating system.
Drop your BMP file above and Morphio decodes it locally, then re-encodes it as PNG using WebAssembly + the browser's native codecs. Nothing is ever uploaded — your files stay on your device. Batch as many files as your machine can handle. See exactly how in-browser conversion works.
Open the BMP to PNG page, drop your image on the drop zone and press convert. Morphio runs an in-browser image pipeline built on Canvas and WebAssembly codecs, so the BMP data never leaves your device and no server ever receives a copy.
Colour profile and pixel dimensions are preserved; you choose the quality level before the file is written. Converting BMP to PNG only rewrites the container and encoding you asked for — the source file on your disk is never modified.
Yes. The free plan covers 10 conversions a day with files up to 200 MB and adds no watermark or sign-up. Morphio Pro ($5/month, or $29 once for lifetime access) removes the daily cap and raises the per-file limit to 5 GB.
Morphio decodes the BMP file at full fidelity and re-encodes it at a high-quality PNG setting, so the difference is normally invisible or inaudible. What conversion cannot do is recover detail the original BMP file already threw away.
Yes — drop the whole batch in and each file is processed in turn on your own machine. The practical limit is your device's memory and patience, not a server quota, because nothing is queued anywhere else.
No. The conversion runs entirely inside your browser using WebAssembly, so the file never leaves your device — you can disconnect from the internet after the page loads and it still works.