HEIC vs HDR — Comparison & Free Converter
Fast, instant HEIC to HDR conversion. No signup required. Just drop your .heic file and get .hdr in seconds.
Batch Settings
Converting to HDR won't restore lost quality
Your HEIC file has already undergone lossy compression. Converting to HDR preserves what's left — it prevents further degradation from re-saving — but it will not magically sharpen a blurry image or recover discarded audio frequencies.
Animation frames will be lost
HEIC supports animation, but HDR does not. Only the first frame (or a representative frame) will be preserved. If you need animation, consider converting to WebP or GIF instead.
Some metadata may not survive
Your HEIC file may contain EXIF, XMP metadata. HDR has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
Default format on iPhone 7+ (iOS 11+)
Your device saves files in HEIC by default (iPhone 7+ (iOS 11+), iPad Pro 2017+, macOS High Sierra+). Most people convert because the files won't open on other devices — HDR is universally supported and will work everywhere.
スマートフォンのカメラ性能が飛躍的に向上し、日常の何気ない瞬間も息をのむような美しさで捉えられるようになりました。特にApple製品で採用されているHEIC形式は、高画質ながらファイルサイズを抑える点で優れています。しかし、これをさらに一歩進め、光のダイナミクスを最大限に引き出すHDR（ハイダイナミックレンジ）へと変換することで、写真表現の可能性は格段に広がります。例えば、夕焼けのグラデーション、夜景のきらめき、または影の中の微細なディテールなど、肉眼で見た感動をそのままに、より豊かな色彩と奥行きで再現することが可能です。このページでは、大切な一枚をより印象深く、見る人の心に響く作品へと昇華させるための、HEICからHDRへの変換プロセスを丁寧にご案内いたします。
- 漫画・アニメのデジタル彩色原画
- ビジネスプレゼン資料のグラフ・画像
- 縦書きコンテンツの背景画像
日本のビジネスシーンでは、資料の視認性やフォントの美しさが重視されるため、HDR変換による色の深みや階調表現は、プロフェッショナルな印象を与える上で有効です。特に縦書きの文字との組み合わせにおいて、背景画像の質感は全体の雰囲気を大きく左右します。
About HEIC to HDR Conversion
HEIC or HDR — which format should you use? The answer depends on your needs. Here's a quick breakdown.
HEIC (High Efficiency Image Container) is Apple's format for iPhone photos, offering twice the compression of JPEG. It has limited platform support. HDR (Radiance) is a high-dynamic-range image format used in lighting and rendering. It has niche platform support.
Full Name: HEIC uses High Efficiency Image Container, while HDR uses Radiance HDR Image. Compression: HEIC uses Lossy, while HDR uses Lossless. Transparency: HEIC uses No, while HDR uses No.
So when should you convert HEIC to HDR? This conversion is ideal when you You captured this file on iPhone 7+ (iOS 11+) and need to share it with others. This conversion helps you preserve files for long-term archival.
HEIC supports animation, but HDR does not. Only the first frame (or a representative frame) will be preserved. If you need animation, consider converting to WebP or GIF instead. Common misconception: ""Converting HEIC to HDR will improve the quality"" — in reality, no. heic has already permanently discarded data during compression. converting to hdr preserves what's left but cannot restore lost detail. the file will just be larger.
If you've decided HDR is the right choice, CocoConvert makes the conversion effortless. Upload your .heic file, pick HDR, and click Convert — done in seconds. The converter runs on secure servers in Germany, powered by FFmpeg, Sharp, and qpdf. Files are encrypted via TLS and erased within 24 hours.
Free tier: 5 files/hour, 250 MB each. Pro: 100 files/hour, 5 GB each. Works in every modern browser on desktop and mobile.
How to Convert HEIC to HDR
- 1
Choose your HEIC file
Upload your .heic file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to HDR
Select .hdr from the output options. The converter applies optimal quality settings automatically.
- 3
Run the conversion
Click Convert. Server-side processing means your device stays fast — even for large image files.
- 4
Get your HDR file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert HEIC to HDR
Your HEIC image is decoded into raw pixel data, then re-encoded as HDR. Current quality is preserved as-is — no further degradation.
Your HEIC file is decoded — the compressed/stored pixel data is expanded into raw RGB pixels
Pixels are re-encoded using Radiance HDR Image's lossless compression
Metadata (EXIF, ICC profiles) is transferred where HDR supports it
The HDR file is saved and ready for download
HEIC vs HDR — Detailed Comparison
| Feature | .HEIC | .HDR |
|---|---|---|
| Full Name | High Efficiency Image Container | Radiance HDR Image |
| Compression | Lossy | Lossless |
| Transparency | No | No |
| Animation | Yes | No |
| Color Depth | 10 bits/channel | 32-bit float (RGBE encoding) |
| HDR Support | Yes | Yes |
| Typical File Size | 1–3 MB per photo (half of JPEG) | 5–50 MB |
| Platform Support | Limited | Very Limited |
| Browser Support | Limited | none |
| Year Created | 2015 | 1985 |
| Open Standard | No | Yes |
Should You Convert HEIC to HDR?
When to Convert
- ✓You captured this file on iPhone 7+ (iOS 11+) and need to share it with others
When NOT to Convert
- ✗You're hoping to improve image/audio quality — converting lossy to lossless cannot recover lost data
Common Mistakes When Converting HEIC to HDR
"Converting HEIC to HDR will improve the quality"
No. HEIC has already permanently discarded data during compression. Converting to HDR preserves what's left but cannot restore lost detail. The file will just be larger.
"My animated HEIC will stay animated after conversion"
HDR does not support animation. Only a single frame will be saved. Use WebP or GIF to preserve animation.
Frequently Asked Questions
Should I use HEIC or HDR?
It depends on your goal. HEIC offers smaller files via lossy compression. HDR preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is HDR higher quality than HEIC?
Not necessarily. HEIC supports animation, but HDR does not. Only the first frame (or a representative frame) will be preserved. If you need animation, consider converting to WebP or GIF instead. Quality depends on the compression type and settings, not just the format name.
Can I convert HEIC to HDR on Mac and Windows?
Yes. CocoConvert is a web-based tool that works in all modern browsers — Chrome, Safari, Firefox, Edge — on any operating system including macOS, Windows, Linux, iOS, and Android.
Is CocoConvert free for HEIC to HDR?
Yes. Free users get 5 conversions per hour (250 MB each). Pro subscribers unlock 100 files per hour, 5 GB per file, and priority processing.
What tools does CocoConvert use for HEIC to HDR?
CocoConvert uses FFmpeg for audio/video, Sharp for images, and qpdf for documents — the same open-source libraries used by Netflix, YouTube, and major enterprise platforms.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.