HEIC to BMP

What is HEIC?

HEIC (High Efficiency Image Container) is a modern image format developed by the Moving Picture Experts Group (MPEG) and based on the HEVC (H.265) video codec. Apple adopted HEIC as the default photo capture format on iPhone starting with iOS 11 in 2017, and it is now the format used by default in the iPhone Camera app when "High Efficiency" is enabled in settings. HEIC files typically use the .heic extension, while the broader .heif container can also hold images from other codecs. HEIC offers roughly twice the compression efficiency of JPG at equivalent visual quality, and it supports 16-bit color, transparency, and multiple images in a single container (useful for bursts and Live Photos).

Despite its technical advantages, HEIC has a compatibility problem. While macOS, iOS, and modern versions of Windows 10/11 can open HEIC natively, many older applications, content management systems, image editors, web browsers, embedded systems, and email clients cannot decode HEIC files at all. When an unsupported app receives a .heic file, the user usually sees a broken image icon or an error. That compatibility gap — along with the need for raw, uncompressed pixel data in embedded and industrial workflows — is the most common reason people convert HEIC photos to BMP.

What is BMP?

BMP (Bitmap) is one of the oldest raster image formats, originally introduced by Microsoft and IBM in the late 1980s for the Windows and OS/2 operating systems. A BMP file stores image data as a straightforward grid of pixels, typically with no compression at all, or with a very simple run-length encoding scheme. This simplicity makes BMP extremely easy to read and write programmatically, and every graphics library, image editor, and operating system can open BMP files without any special codecs.

The trade-off for this universal compatibility is file size: because BMP stores every pixel without compression, a BMP file is usually many times larger than the same image stored as HEIC, JPG, PNG, or WebP. BMP is most commonly used in embedded systems, firmware development, legacy applications, and scenarios where format simplicity and guaranteed compatibility matter more than file size.

HEIC vs BMP comparison

HEIC and BMP are both raster image formats, but they sit at opposite ends of the image-format spectrum. HEIC is a cutting-edge, highly compressed format designed for mobile photography, while BMP is an older, uncompressed format designed for simplicity and universal pixel-level access. The table below compares the key features of each format side by side to help you choose the right one when you convert HEIC to BMP.

Feature	HEIC (HEIF)	BMP
Compression	Lossy (HEVC-based)	None (uncompressed)
File size	About half of JPG	Very large
Color depth	Up to 16-bit	24-bit (16.7 million colors)
Transparency	Supported	Not supported (24-bit output)
Year introduced	2015	Late 1980s
Best for	iPhone photos, mobile storage	Embedded systems, legacy apps, raw pixel data
Browser support	Modern browsers only	All modern browsers
Source	iPhone default camera format	Open format since the 1980s

In short, HEIC wins on file size and mobile storage efficiency, while BMP wins on simplicity, universal pixel-level access, and guaranteed compatibility with embedded and legacy systems. Converting HEIC to BMP trades compression for raw, uncompressed pixel data.

When to use HEIC to BMP conversion

Although HEIC is an excellent format for capturing and storing iPhone photos, there are specific situations where converting HEIC to BMP is the right choice. Whenever you need raw, uncompressed pixel data or guaranteed compatibility with embedded systems that cannot decode HEIC, BMP is the safest option:

• Embedded systems and firmware. Microcontrollers and embedded displays expect raw bitmap data and cannot decode HEVC-based formats like HEIC. Converting to BMP provides the raw pixel grid they require.
• Legacy software compatibility. Many older image editors, viewers, and industrial tools cannot read HEIC files. Converting to BMP ensures universal compatibility.
• Industrial and point-of-sale systems. Specialized hardware such as POS terminals, kiosk displays, and signage controllers often expect BMP input.
• Raw pixel analysis. Because BMP stores pixels without compression, it is useful for image processing tasks that require exact, unaltered pixel values from an iPhone photo.
• Documentation and archiving. BMP's simplicity and longevity make it a stable format for archiving iPhone photos where future readability matters more than size.
• Development and testing. When writing image-processing code, BMP is the easiest format to read and write without external libraries — useful when testing with HEIC source photos.

How to convert HEIC to BMP

Converting a HEIC photo to BMP with this tool takes only a few seconds and happens entirely in your browser — no uploads, no sign-up, no watermark. The tool decodes your HEIC with the browser's image engine, draws it onto a canvas with a white background, and re-encodes the canvas as an uncompressed 24-bit BMP through a manual BMP encoder. Follow these three simple steps to convert your HEIC to BMP:

1. Upload your HEIC. Click the upload area above or drag and drop a .heic or .heif file. Your photo is decoded locally and previewed instantly.
2. Convert. Click the "Convert to BMP" button. The HEIC is decoded and re-encoded as an uncompressed BMP image.
3. Download BMP. Click "Download BMP" to save the converted file to your device. Your original HEIC stays untouched.

Because every step runs locally in your browser using JavaScript, your HEIC photo is never uploaded to a server. This makes the conversion completely private, fast, and suitable for sensitive or personal images. Note that HEIC decoding requires a modern browser with HEIC support.