JP2 to HDR — Format Comparison & Online Converter
Fast, instant JPEG 2000 to HDR conversion. No signup required. Just drop your .jp2 file and get .hdr in seconds.
Batch Settings
Transparency will be lost
JP2 supports transparency, but HDR does not. Transparent areas will be filled with a solid color (typically white). If you need transparency, consider converting to PNG or WebP instead.
Some metadata may not survive
Your JP2 file may contain EXIF, ICC metadata. HDR has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
JP2（JPEG 2000）形式は、その高圧縮率と非可逆・可逆圧縮の両方に対応する柔軟性から、特に専門的な画像処理分野で重宝されてきました。一方、HDR（High Dynamic Range）形式は、より広い輝度と色彩の範囲を表現できるため、写真や映像のリアリティを格段に向上させます。この二つの形式間の変換は、単なるデータ形式の変更以上の意味を持ちます。JP2でアーカイブされた精細な画像を、HDRの豊かな表現力で現代のディスプレイ環境に最適化することで、新たな視覚体験を創出できるのです。特に、日本のデジタルコンテンツ制作現場では、この変換が作品の魅力を最大限に引き出す鍵となるでしょう。
- 漫画・アニメ原画のデジタルアーカイブの高画質化
- ビジネス向け高精細図面や地図データの視認性向上
- 伝統工芸品や美術品のデジタル展示用データ変換
日本では、高解像度かつ色深度の深いJP2形式が文化財のデジタル化に用いられることが多く、これをHDRに変換することで、劣化なく現代の視聴環境でその価値を再発見する動きが注目されています。
About JPEG 2000 to HDR Conversion
JP2 (introduced 2000) and HDR (introduced 1985) are both image formats, but they differ in important ways. JP2 (JPEG 2000) offers wavelet-based compression with better quality than JPEG at the same bit rate. HDR (Radiance) is a high-dynamic-range image format used in lighting and rendering.
Full Name: JP2 uses JPEG 2000, while HDR uses Radiance HDR Image. Compression: JP2 uses Lossy & Lossless, while HDR uses Lossless. Transparency: JP2 uses Yes, while HDR uses No.
When you convert JP2 to HDR, the goal is to convert between formats quickly. JP2 supports transparency, but HDR does not. Transparent areas will be filled with a solid color (typically white). If you need transparency, consider converting to PNG or WebP instead. Understanding these technical differences helps you choose the right format for your workflow.
Your JP2 file is decoded and re-encoded as HDR. The conversion involves 4 steps: (1) your jp2 file is uploaded and the format is validated, (2) the file content is decoded into its raw representation, (3) the data is re-encoded in hdr format with optimal settings, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you When you specifically need a HDR file for your workflow. For the opposite direction, CocoConvert also supports HDR to JP2 conversion.
How to Convert JPEG 2000 to HDR
- 1
Upload .jp2 file
Select your JP2 file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .hdr
Set HDR as the output format. The converter uses optimal settings based on the JP2→HDR conversion profile.
- 3
Convert
The server-side engine decodes your JP2 file and re-encodes it as HDR. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .hdr file. Multiple output files can be downloaded together.
What Happens When You Convert JPEG 2000 to HDR
Your JP2 image is decoded into raw pixel data, then re-encoded as HDR.
Your JP2 file is decoded — the compressed/stored pixel data is expanded into raw RGBA (with alpha channel) pixels
Transparency is resolved: transparent pixels are composited onto a white background
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
JPEG 2000 vs HDR — Detailed Comparison
| Feature | .JP2 | .HDR |
|---|---|---|
| Full Name | JPEG 2000 | Radiance HDR Image |
| Compression | Lossy & Lossless | Lossless |
| Transparency | Yes | No |
| Animation | No | No |
| Color Depth | up to 16 bits/channel | 32-bit float (RGBE encoding) |
| HDR Support | No | Yes |
| Typical File Size | 1–5 MB per photo | 5–50 MB |
| Platform Support | Limited | Very Limited |
| Browser Support | Limited | none |
| Year Created | 2000 | 1985 |
| Open Standard | Yes | Yes |
Should You Convert JPEG 2000 to HDR?
When to Convert
- ✓When you specifically need a HDR file for your workflow
When NOT to Convert
- ✗You need to preserve transparent areas — HDR doesn't support transparency
Consider alternatives:
Common Mistakes When Converting JPEG 2000 to HDR
"My file's transparent background will carry over to HDR"
HDR doesn't support transparency. Transparent areas become solid (usually white). Save as PNG or WebP if you need transparency.
Frequently Asked Questions
What is the difference between JP2 and HDR?
JP2 (JPEG 2000) offers wavelet-based compression with better quality than JPEG at the same bit rate. HDR (Radiance) is a high-dynamic-range image format used in lighting and rendering. Full Name: JP2 uses JPEG 2000, while HDR uses Radiance HDR Image. Compression: JP2 uses Lossy & Lossless, while HDR uses Lossless. Transparency: JP2 uses Yes, while HDR uses No.
Does JP2 to HDR conversion affect quality?
JP2 supports transparency, but HDR does not. Transparent areas will be filled with a solid color (typically white). If you need transparency, consider converting to PNG or WebP instead.
Which format has better compression, JP2 or HDR?
JP2 uses both compression. HDR uses lossless compression. The better choice depends on whether you prioritize file size or quality.
How long does JP2 to HDR conversion take?
Most conversions finish in seconds. Larger files or complex image content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is JP2 or HDR better for long-term storage?
HDR is better for archival since it preserves all original data.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.