Convert BMP to HEIC Online

BMP files are uncompressed - They can be enormous even for relatively small images. A 1920×1080 BMP file is approximately 6 MB; the equivalent-quality HEIC is typically 100–300 KB. Converting BMP to HEIC provides the most dramatic space savings of any conversion on this site (routinely 95%+ reduction) with minimal visible quality impact at settings of 85%+.

BMP files commonly appear in Windows development contexts, screensavers, paint program output, and legacy software that saves images in uncompressed format. They are also produced by some industrial and scientific instruments, screen capture tools, and older scanners. Converting to HEIC makes these files practical for long-term archiving - Especially in Apple Photos or iCloud where HEIC is the native currency.

BMP does not support transparency, so no alpha handling is needed during conversion. The pixel data maps directly to the HEVC encoder. Keep in mind the usual HEIC caveat: the output opens natively on Apple devices, but Windows needs the HEVC Video Extensions codec - If the files must return to a legacy Windows workflow, JPG or PNG may serve better.

BMP, short for Bitmap Image File, was introduced by Microsoft and IBM in 1987 as the native raster format for OS/2 and Windows 2.0. Its appeal was simplicity: a header followed by raw pixel rows, easy to parse in C with no decompression code. That same simplicity made it bloated, and as bandwidth costs fell in the late 1990s the web abandoned BMP in favor of JPEG, GIF, and PNG. Today BMP survives mainly inside legacy Windows software, MRI scanners, factory-floor HMIs, and old game asset pipelines. Converting BMP to HEIC is the most extreme size swing on this site: raw pixels meet HEVC compression, and 30x-40x reductions are routine at visually identical quality.

Older raster formats are storage-hungry: BMP stores pixels uncompressed, TIFF archives routinely run 50–200 MB per scan, and even GIF is inefficient by modern standards. Converting these to HEIC collapses the files to a small fraction of their original size while keeping the visual content intact - Often a 90%+ reduction for BMP and uncompressed TIFF sources.

The typical use case is archive modernisation on Apple hardware: folders of legacy scans, exported frames, and old graphics converted to HEIC take up far less space on a Mac or in iCloud, and open natively in Preview, Photos, and Quick Look without any extra software.

HEIC encoding is lossy by default, so keep the original files when they serve as archival masters - Particularly lossless TIFF scans of documents or artwork. For everyday reference copies and personal archives, the space savings usually outweigh the invisible quality trade.