HDR vs HEIC — Comparison & Free Converter
Fast, instant HDR to HEIC conversion. No signup required. Just drop your .hdr file and get .heic in seconds.
Batch Settings
Quality reduction ahead
HDR is lossless, meaning every bit of data is preserved. HEIC uses lossy compression — some data is permanently discarded to reduce file size. At high quality settings the difference is usually imperceptible, but the original data cannot be recovered.
Color depth reduction: 32-bit → 10-bit
HDR stores up to 32 bits per channel, but HEIC supports only 10 bits. You may notice banding in smooth gradients (like sky or skin tones) where subtle color transitions are lost.
What compression artifacts to expect
HEIC lossy compression can produce blurring and occasional color shifts at high compression. At the high quality settings CocoConvert uses by default, these are usually invisible to the eye. Lower quality settings trade visual fidelity for smaller file sizes.
高精細なHDR画像を、iPhoneやMacで広く使われているHEIC形式へ変換したいとお考えですか？色彩豊かな風景や、精密なビジネス資料など、HDRの持つ表現力を損なうことなく、より汎用性の高いHEIC形式で共有・保存することは、今日のデジタル環境において非常に重要です。当社の変換ツールは、画像の品質を維持しつつ、ファイルサイズを効率的に最適化します。特に、日本のユーザーの皆様が求める「美しさ」と「実用性」を両立させるため、細部にまでこだわった設計となっております。簡単な操作で、あなたのHDR画像を次のステージへと導きましょう。
- アニメ・漫画原画の共有
- ビジネス会議資料の軽量化
- 個展・作品集のデジタル展示
日本ではiPhoneユーザーが多く、HEIC形式への対応は、デバイス間の互換性を高める上で非常に有効です。特に縦書きの文書や、フォントにこだわったデザインを扱う際には、高画質を保ちつつファイルサイズを抑えられるHEICの利点が際立ちます。
About HDR to HEIC Conversion
HDR or HEIC — which format should you use? The answer depends on your needs. Here's a quick breakdown.
HDR (Radiance) is a high-dynamic-range image format used in lighting and rendering. It has niche platform support. HEIC (High Efficiency Image Container) is Apple's format for iPhone photos, offering twice the compression of JPEG. It has limited platform support.
Full Name: HDR uses Radiance HDR Image, while HEIC uses High Efficiency Image Container. Compression: HDR uses Lossless, while HEIC uses Lossy. Transparency: HDR uses No, while HEIC uses No.
So when should you convert HDR to HEIC? This conversion is ideal when you Your HDR file is too large for email attachments or upload limits, or when you You want to reduce storage usage without noticeably affecting quality. This conversion helps you reduce file size without visible quality loss.
HEIC lossy compression can produce blurring and occasional color shifts at high compression. At the high quality settings CocoConvert uses by default, these are usually invisible to the eye. Lower quality settings trade visual fidelity for smaller file sizes.
If you've decided HEIC is the right choice, CocoConvert makes the conversion effortless. Upload your .hdr file, pick HEIC, 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 HDR to HEIC
- 1
Choose your HDR file
Upload your .hdr file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to HEIC
Select .heic 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 HEIC file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert HDR to HEIC
Your HDR image is decoded into raw pixel data, then re-encoded as HEIC. Some quality is permanently lost during compression. CocoConvert uses high-quality defaults to minimize this.
Your HDR file is decoded — the compressed/stored pixel data is expanded into raw RGB pixels
Pixels are re-encoded using High Efficiency Image Container's lossy compression algorithm
Metadata (EXIF, ICC profiles) is transferred where HEIC supports it
The HEIC file is saved and ready for download
HDR vs HEIC — Detailed Comparison
| Feature | .HDR | .HEIC |
|---|---|---|
| Full Name | Radiance HDR Image | High Efficiency Image Container |
| Compression | Lossless | Lossy |
| Transparency | No | No |
| Animation | No | Yes |
| Color Depth | 32-bit float (RGBE encoding) | 10 bits/channel |
| HDR Support | Yes | Yes |
| Typical File Size | 5–50 MB | 1–3 MB per photo (half of JPEG) |
| Platform Support | Very Limited | Limited |
| Browser Support | none | Limited |
| Year Created | 1985 | 2015 |
| Open Standard | Yes | No |
Should You Convert HDR to HEIC?
When to Convert
- ✓Your HDR file is too large for email attachments or upload limits
- ✓You want to reduce storage usage without noticeably affecting quality
Frequently Asked Questions
Should I use HDR or HEIC?
It depends on your goal. HDR preserves full quality. HEIC offers smaller files via lossy compression. Choose based on whether file size or quality matters more for your use case.
Is HEIC higher quality than HDR?
Not necessarily. HEIC lossy compression can produce blurring and occasional color shifts at high compression. At the high quality settings CocoConvert uses by default, these are usually invisible to the eye. Lower quality settings trade visual fidelity for smaller file sizes. Quality depends on the compression type and settings, not just the format name.
Can I convert HDR to HEIC 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 HDR to HEIC?
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 HDR to HEIC?
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.