Convert HDR to PNG Online
Turn HDR files into PNG output online. The service is free, requires no account, supports batch queues, and limits server uploads to 100 MB per file. The conversion runs on the server in an isolated request. Keep the original file while you review the converted copy.
Convert .HDR to .PNG
Select a file to begin. Processing details and limits are listed below.
How to convert HDR to PNG
- 1
Choose HDR files
Add one or more HDR files to the queue. The uploader keeps batch items separate.
- 2
Choose PNG settings
Set the available quality or format options, or keep the defaults for a first pass.
- 3
Run and save the result
Run the queue and download the PNG files individually or together as a ZIP.
Radiance HDR vs Portable Network Graphics
| Spec | Radiance HDR | Portable Network Graphics |
|---|---|---|
| MIME type | image/vnd.radiance | image/png |
| Format type | image | image |
| Standard | Pending review | ISO/IEC 15948 |
| First release | Pending review | 1996 |
| Browser support | Pending review | All current major browsers |
| Contents | High dynamic range image format. | Lossless DEFLATE-compressed raster image with optional alpha transparency and animation through APNG. |
About Radiance HDR
High dynamic range image format.
About Portable Network Graphics
Pixel-perfect lossless output, clean alpha transparency, and strong support for screenshots, logos, and line art. Photographic images are usually much larger than JPEG or WebP; metadata and animation support vary by viewer.
Format referenceWhy convert HDR to PNG?
- PNG is more appropriate for the target application, device, or delivery channel than HDR.
- Compatibility is the main reason to convert when another person or service cannot open the source.
- The new format may support a feature the source container does not.
- The result can be reviewed without changing the file that other people still use.
Will quality change?
The PNG output stores decoded pixels without another lossy compression step. It cannot recreate detail the source already lost, and the file may be larger. Keep the source if you may need to adjust the conversion later.
Processing and limits
- Processing
- Server-side
- Engine
- Sharp and ImageMagick
- Maximum size
- 100 MB per file on the server.
- Batch support
- Yes, multiple files can be queued; completed results can be downloaded as a ZIP.
- Quality controls
- Options can adjust quality, output dimensions.
The file is processed on the server because the conversion requires a server-side engine or a utility operation.
- Photographic images are usually much larger than JPEG or WebP; metadata and animation support vary by viewer.
- Review the converted file in the destination application before deleting the source.
- Batch results should be spot-checked before publication or delivery.
Platform compatibility
PNG is a broadly supported target, including all current major browsers. The source is HDR, which may have narrower support.
When not to convert
- Do not convert when the original HDR must remain the only editable or archival copy.
- Skip the conversion when the destination already accepts HDR and no compatibility problem exists.
- For a one-off preview, a local viewer may be faster than creating a new delivery file.
Frequently asked questions
- Can I convert HDR to PNG without installing software?
- Upload a HDR file, choose the available PNG options, run the conversion, and download the result. The tool is free, supports batches, and accepts server uploads up to 100 MB.
- Is Convert HDR to PNG free?
- It is free, requires no account, and adds no watermark. Server uploads are limited to 100 MB per file, and browser-first paths are limited by device memory.
- Does HDR to PNG conversion lose quality?
- The PNG output stores decoded pixels without another lossy compression step. It cannot recreate detail the source already lost, and the file may be larger. Keep the source if you may need to adjust the conversion later.
- Does the file leave my device?
- Yes. This conversion uses a server-side engine, so the file is uploaded over HTTPS, processed in an isolated request, and removed after the result is produced.
- Can I convert several files at once?
- Queue multiple files, run them together, and download the finished results as a ZIP. Each server file is limited to 100 MB, and large batches may take longer.
- What are the limitations?
- Open the downloaded PNG file in the application or database you plan to use, check the structure against the source, and keep the original until the output is approved.