How to Convert BMP to HDR — Quick & Free
Fast, instant BMP to HDR conversion. No signup required. Just drop your .bmp file and get .hdr in seconds.
Batch Settings
您是否曾想过，将那些珍贵的BMP位图，升级为色彩更丰富、细节更生动的HDR高动态范围图像？无论是老照片的新生，还是游戏截图的视觉震撼，HDR都能让您的作品焕发不一样的光彩。在数字世界里，色彩的层次和光影的捕捉，决定了图像的感染力。我们的在线工具，正是为您量身打造，旨在提供一个便捷、高效的转换方案。无需复杂的专业软件，只需简单几步，就能让您的BMP文件拥有HDR的宽广色域和极致对比度，让每一次分享都成为视觉盛宴，每一次回顾都充满惊喜。
- 游戏截图高清化
- 老旧照片色彩修复
- 移动端图像细节增强
考虑到微信等社交平台对图片色彩表现的需求，将BMP转换为HDR能有效提升分享图片的视觉冲击力，尤其是在高分辨率手机屏幕上观看时，效果更为显著。
About BMP to HDR Conversion
Short answer: yes, you can convert BMP to HDR online for free, and quality is well preserved with the right settings. Just upload your .bmp file to CocoConvert, pick HDR as the output, and click Convert. The whole process takes seconds.
Now for the details. BMP is an uncompressed raster format that preserves every pixel but produces very large files. HDR (Radiance) is a high-dynamic-range image format used in lighting and rendering. Converting between these two formats lets you convert between formats quickly.
Full Name: BMP uses Bitmap Image, while HDR uses Radiance HDR Image. Compression: BMP uses None (uncompressed), while HDR uses Lossless. Transparency: BMP uses No, while HDR uses No.
Your BMP file is decoded and re-encoded as HDR. Converting BMP to HDR maintains high quality with CocoConvert's optimised encoder settings.
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 BMP to HDR
- 1
1. Upload BMP
Drop your .bmp file onto the page (or tap "Browse" on mobile). Add multiple files for batch conversion.
- 2
2. Select HDR
Choose .hdr 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 .hdr file is ready. Download it directly or get all files as a zip archive.
What Happens When You Convert BMP to HDR
Your BMP image is decoded into raw pixel data, then re-encoded as HDR. No quality loss — pixel data is preserved exactly.
Your BMP 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
BMP vs HDR — Detailed Comparison
| Feature | .BMP | .HDR |
|---|---|---|
| Full Name | Bitmap Image | Radiance HDR Image |
| Compression | None (uncompressed) | Lossless |
| Transparency | No | No |
| Animation | No | No |
| Color Depth | up to 32 bits/channel | 32-bit float (RGBE encoding) |
| HDR Support | No | Yes |
| Typical File Size | 10–50 MB per photo (uncompressed) | 5–50 MB |
| Platform Support | Universal | Very Limited |
| Browser Support | Limited | none |
| Year Created | 1986 | 1985 |
| Open Standard | No | Yes |
Should You Convert BMP to HDR?
When to Convert
- ✓When you specifically need a HDR file for your workflow
Frequently Asked Questions
Is BMP to HDR conversion free?
Yes. CocoConvert offers free BMP to HDR 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 BMP to HDR 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 BMP file and the converted HDR file are both automatically deleted from our servers within 24 hours. They are never shared, sold, or analysed.
Does converting BMP to HDR lose quality?
Converting BMP to HDR maintains high quality with CocoConvert's optimised encoder settings.
Can I convert HDR back to BMP?
Yes, CocoConvert supports HDR to BMP conversion as well. However, if the original conversion involved lossy compression, converting back won't recover the lost data.
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