BMP to HEIC Converter

1. Upload one or more BMP files (up to 50 MB total).
2. Click 'Convert to HEIC' — finishes in under 2 seconds per image.
3. Download HEIC files individually, or grab all as a ZIP.

BMP is uncompressed — a typical BMP file is 30-50x larger than the equivalent HEIC. Converting BMP to HEIC saves up to 95% of storage, making it one of the most dramatic size reductions possible in image conversion.

BMP is the oldest and largest image format still in use — it stores pixels uncompressed. A single 4 MB BMP screenshot becomes about 200 KB as HEIC, a 95% reduction. If you have a folder of BMP files (from old software, screenshots, or legacy workflows), converting to HEIC on Apple devices reclaims enormous storage space and puts the images into a modern, efficient format.

The converter reads the uncompressed BMP pixel data and re-encodes it as HEIC using HEVC (H.265) compression. The output is typically 20-50x smaller than the BMP source. BMP's alpha channel (32-bit BMP only) is preserved as HEIC's alpha channel.

• Reclaiming storage from a large folder of BMP screenshots.
• Converting legacy BMP archives to a modern efficient format.
• Preparing old BMP images for iCloud Photos sync.
• Consolidating mixed-format photo libraries on Apple devices.
• Reducing backup size for iCloud or Time Machine.
• Converting old Windows-produced images to iPhone-compatible format.
• Freeing disk space on Macs with legacy BMP files.

HEIC is a lossy format, so converting BMP to HEIC discards some image data. However, HEVC compression is very efficient at preserving perceived quality — the visual difference is typically not noticeable at normal viewing distances, while the file size shrinks by 95% or more. For archival of critical originals, keep the BMP.

• HEIC is not natively supported on Windows 10 or earlier.
• Repeated BMP → HEIC → BMP round-trips lose quality.
• Very large BMP files (over 50 MB) are rejected.
• Animated BMP sequences are converted using only the first frame.
• HEIC is not supported by most web browsers (Safari only).

• HEIC opens natively on iOS 11+, iPadOS, macOS High Sierra+.
• Windows 10/11 supports HEIC with the free HEIF Image Extensions.
• Native support in Photos, Preview, and Adobe CC apps.
• Syncs seamlessly with iCloud Photos.
• Ideal for modern Apple workflows.

• BMP → HEIC is the biggest size reduction available — up to 95%.
• For non-Apple destinations, use BMP → JPG or WebP instead.
• Keep the original BMP if it's irreplaceable.
• Batch-convert up to 50 MB of BMP files at once.
• The 32-bit BMP transparency becomes HEIC alpha automatically.

HEIC won't open on Windows

Windows 10 needs the free HEIF Image Extensions; Windows 11 supports HEIC natively. For broad compatibility, use JPG instead.

Some BMP files fail to convert

Some legacy BMP variants (RLE-compressed, OS/2 BMP) may not be supported. Convert to uncompressed BMP first, then retry.

HEIC file is unexpectedly large

If the BMP source was small (e.g. a simple screenshot with flat colors), HEIC cannot compress much further. The 30-50x reduction is typical for detailed photos.

• Microsoft — BMP File Format
• Apple — HEIF and HEVC