MMegaConvert

Convert HEIC to HDR

Free online HEIC to HDR converter. No signup required.

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Max file size: 100 MB

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How to Convert HEIC to HDR

Follow these simple steps to convert your file in seconds.

  1. 1

    Upload your .heic file

    Drag and drop your .heic file into the upload area, or click "Browse" to select it from your device. Your file is uploaded securely and processed on our servers.

  2. 2

    Click "Convert to HDR"

    Once your file is uploaded, press the convert button to start the HEIC to HDR conversion process.

  3. 3

    Wait for the conversion to complete

    The conversion usually takes just a few seconds. You can see the progress in real time while your file is being processed.

  4. 4

    Download your converted .hdr file

    When the conversion is finished, click the download button to save your new .hdr file. The file is ready to use immediately.

Understanding HEIC and HDR Formats

Learn about the source and target file formats to understand what happens during conversion.

Source Format

HEIC Image

image/heic

HEIC (High Efficiency Image Container) is a container format based on the HEIF standard that stores images compressed with the HEVC (H.265) codec. It is the default photo format on Apple devices running iOS 11 and later, offering roughly 50% file size reduction compared to JPEG at similar quality. HEIC supports advanced features including image sequences, depth maps, and auxiliary data.

Advantages

  • Approximately 50% smaller file sizes compared to JPEG at equivalent quality
  • Supports 16-bit color depth, alpha transparency, and depth maps
  • Can store multiple images, live photos, and burst sequences in a single file

Limitations

  • Limited support on Windows and Android without additional codecs
  • HEVC codec is subject to patent licensing requirements
  • Not supported by most web browsers for direct display

Common Uses

  • Default photo format on iPhones and iPads
  • Space-efficient photo storage on Apple devices
  • Live Photos and burst sequences on iOS

Target Format

Radiance HDR Image

image/vnd.radiance

HDR (High Dynamic Range) Radiance format, also known as RGBE, stores images with a high dynamic range of luminance values using a run-length encoded format. Developed by Greg Ward for the Radiance lighting simulation system, it encodes each pixel as three 8-bit mantissas and a shared 8-bit exponent. HDR images capture a much wider range of brightness than standard 8-bit formats.

Advantages

  • Captures a wide dynamic range of lighting from very dark to very bright
  • Relatively compact encoding for high dynamic range data
  • Widely supported in 3D rendering, game engines, and compositing software

Limitations

  • Lower precision than 32-bit EXR for demanding visual effects work
  • Not suitable for direct display without tone mapping
  • Limited to RGB data with no alpha channel support

Common Uses

  • Environment maps and image-based lighting in 3D rendering
  • HDR photography merging and tone mapping workflows
  • Lighting simulation and architectural visualization

Frequently Asked Questions

Common questions about converting HEIC to HDR.

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