How to Convert HDR to PNG — Quick & Free
Fast, instant HDR to PNG conversion. No signup required. Just drop your .hdr file and get .png in seconds.
Batch Settings
HDR data will be tone-mapped
Your HDR file may contain HDR (High Dynamic Range) data. PNG only supports standard dynamic range (SDR). Highlights and shadows will be compressed to fit the 8-bit range — subtle detail in very bright or dark areas may be lost.
写真やイラストを扱う際、HDR形式はその豊かな階調で作品の奥行きを際立たせます。しかし、ウェブサイトでの公開、ビジネス文書への挿入、あるいはSNSでの共有を考えたとき、より汎用性の高いPNG形式への変換が不可欠となる場面も少なくありません。特に、日本のデジタルコンテンツにおいては、漫画のコマ割り、繊細なアニメーションの背景、あるいは縦書き文書に合わせた図版など、透明性や可逆圧縮が求められる機会が多々ございます。当ツールは、HDRが持つ広大な色域と輝度情報を可能な限り保持しつつ、PNGの持つ優れた互換性と表現力を引き出すための架け橋となります。大切な作品の品質を損なうことなく、より多くの人々へ届けるための一助となれば幸いです。
- 漫画原稿のウェブ公開
- ビジネス資料向け画像変換
- アニメ背景画の共有
HDRからPNGへの変換時、特にアニメやイラスト分野では、色の再現性だけでなく、透過情報の正確な保持が日本の制作現場で重視される傾向にあります。PNGの可逆圧縮は、これらのグラフィック要素の品質維持に貢献します。
About HDR to PNG Conversion
Short answer: yes, you can convert HDR to PNG online for free, and some quality differences may occur depending on the format types. Just upload your .hdr file to CocoConvert, pick PNG as the output, and click Convert. The whole process takes seconds.
Now for the details. HDR (Radiance) is a high-dynamic-range image format used in lighting and rendering. PNG uses lossless compression and supports transparency, making it perfect for graphics, logos, and screenshots. Converting between these two formats lets you improve file compatibility across devices.
Full Name: HDR uses Radiance HDR Image, while PNG uses Portable Network Graphics. Compression: HDR uses Lossless, while PNG uses Lossless. Transparency: HDR uses No, while PNG uses Yes.
Your HDR file is decoded and re-encoded as PNG. Your HDR file may contain HDR (High Dynamic Range) data. PNG only supports standard dynamic range (SDR). Highlights and shadows will be compressed to fit the 8-bit range — subtle detail in very bright or dark areas may be lost.
CocoConvert runs entirely online — no software to install, no account to create. Your files are encrypted during upload (TLS), processed on isolated servers in Germany, and permanently deleted after 24 hours. It works in Chrome, Safari, Firefox, Edge, and all mobile browsers.
Need to convert more than one file? Free users can do 5 per hour. Pro gets 100 per hour with files up to 5 GB each.
How to Convert HDR to PNG
- 1
1. Upload HDR
Drop your .hdr file onto the page (or tap "Browse" on mobile). Add multiple files for batch conversion.
- 2
2. Select PNG
Choose .png from the output dropdown. Settings are pre-configured for best results.
- 3
3. Convert
One click. The server handles all the heavy lifting using FFmpeg and Sharp.
- 4
4. Download
Your .png file is ready. Download it directly or get all files as a zip archive.
What Happens When You Convert HDR to PNG
Your HDR image is decoded into raw pixel data, then re-encoded as PNG. No quality loss — pixel data is preserved exactly.
Your HDR file is decoded — the compressed/stored pixel data is expanded into raw RGB pixels
HDR data is tone-mapped to standard dynamic range (8-bit per channel)
Pixels are re-encoded using Portable Network Graphics's lossless compression
Metadata (EXIF, ICC profiles) is transferred where PNG supports it
The PNG file is saved and ready for download
HDR vs PNG — Detailed Comparison
| Feature | .HDR | .PNG |
|---|---|---|
| Full Name | Radiance HDR Image | Portable Network Graphics |
| Compression | Lossless | Lossless |
| Transparency | No | Yes |
| Animation | No | No |
| Color Depth | 32-bit float (RGBE encoding) | 8 or 16 bits/channel (up to 48-bit color) |
| HDR Support | Yes | No |
| Typical File Size | 5–50 MB | 5–20 MB per photo, <1 MB for graphics |
| Platform Support | Very Limited | Universal |
| Browser Support | none | Universal |
| Year Created | 1985 | 1996 |
| Open Standard | Yes | Yes |
Should You Convert HDR to PNG?
When to Convert
- ✓Your HDR file won't open on a recipient's device or in an application
- ✓A website, service, or platform only accepts PNG uploads
- ✓You need a file that works in web browsers
- ✓You need maximum device and software compatibility
When NOT to Convert
- ✗You want to preserve HDR information — PNG only supports standard dynamic range
Frequently Asked Questions
Is HDR to PNG conversion free?
Yes. CocoConvert offers free HDR to PNG conversion with generous daily limits — 25 minutes of processing time and up to 5 files per hour (250 MB each). Pro plans remove these limits.
How fast is HDR to PNG conversion?
Most files convert in 2–10 seconds depending on size. Large image files may take 30 seconds. Batch jobs process in parallel for maximum speed.
What happens to my files after conversion?
Your uploaded HDR file and the converted PNG file are both automatically deleted from our servers within 24 hours. They are never shared, sold, or analysed.
Does converting HDR to PNG lose quality?
Your HDR file may contain HDR (High Dynamic Range) data. PNG only supports standard dynamic range (SDR). Highlights and shadows will be compressed to fit the 8-bit range — subtle detail in very bright or dark areas may be lost.
Can I convert PNG back to HDR?
Yes, CocoConvert supports PNG to HDR conversion as well. However, if the original conversion involved lossy compression, converting back won't recover the lost data.
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