Convert BMP bitmaps to PNG, JPEG, WebP and modern formats — or export any image to BMP for Windows app compatibility. No software to install. No sign-up. Works on any device.
Free No sign-up required Uploads deleted within 2 hours Works on any device
9BMP to other
8Other to BMP
17Total tools
Instant conversion
Your BMP file converts in seconds — no queues, no waiting.
Private & secure
BMP files are converted on our server over HTTPS and deleted automatically within 2 hours.
Works everywhere
Convert BMP on Windows, Mac, iPhone or Android — no app needed.
Free to use
No paid plan for BMP conversion: up to 10 files at a time, 50 MB each, and 120 conversions an hour per visitor.
Yes — completely free. No subscription, no credit card, no per-file charges, and no watermarks on output files. PortImg is funded by non-intrusive display advertising, not by charging users. Every tool on this page is and will remain free.
Choose the specific conversion tool you need from the list above, then click or drag your BMP file onto the upload area. Click Convert, and your converted file downloads automatically — usually within a few seconds. No account creation, no email address, no software to install.
Yes. Files are converted on our server over HTTPS and deleted automatically within 2 hours — we do not share or use uploaded files for any other purpose.
Each file can be up to 50 MB, and you can convert up to 10 files at a time. Conversions run on our server, which allows each visitor up to 120 an hour.
BMP stores raw, uncompressed pixel data — every single pixel gets its own dedicated bytes with no compression whatsoever. A 1920×1080 BMP file is roughly 6 MB regardless of the image content; the equivalent PNG is typically under 1 MB and a JPEG under 300 KB. BMP's only real advantage is that it requires zero processing to read — which is why some Windows system applications still use it internally.
No — this is a lossless conversion. Both BMP and PNG store pixel data without lossy compression, so every pixel in the output PNG is identical to the source BMP. You get a significantly smaller file with zero quality trade-off. This is one of the cleanest format conversions you can make.
BMP is mostly a legacy format today, but it's still used by: older Windows desktop wallpaper and theme systems, some embedded devices and microcontrollers that display images, certain CAD and industrial software, and some older fax/scanner software that outputs BMP. If you're receiving BMP files from one of these systems, converting to PNG or JPEG will dramatically reduce the file size without any quality change.
Standard BMP does not support transparency. There is a 32-bit BMP variant with an alpha channel, but it has very limited software support outside of Windows API contexts. If you need transparency, PNG or WebP are the correct formats to use.