Convert HDR to PNG Online Free
Convert HDR (Radiance) images to lossless PNG with intelligent tone mapping. Perfect for previews, web, and editing.
ToFormat — free online converter
Upload your files
Max file size: 30MB · Up to 20 files at once
Why ToFormat?
HDR to Lossless
HDR files contain high dynamic range data. Our converter applies smart tone mapping to create beautiful lossless PNG images that look natural on any screen while preserving all 8‑bit detail.
Wide Compatibility
PNG is supported everywhere — browsers, image editors, and operating systems. Make your HDR renders and photos viewable without special software.
Batch Processing
Upload up to 20 HDR files at once. We'll convert them all and package in a ZIP for easy download.
About the Formats
☀️ What is HDR (Radiance)?
HDR (High Dynamic Range) format, also known as Radiance .hdr, stores floating-point pixel data capturing a wide range of luminance levels. It's commonly used in 3D rendering, lighting simulation, and high-end photography. HDR images require tone mapping for display on standard monitors.
All HDR conversion tools →🖼️ What is PNG?
PNG (Portable Network Graphics) is a lossless raster format created in 1996. It supports full alpha transparency, 24‑bit color, and is widely used for web graphics, logos, and screenshots. PNG is the standard for lossless images with transparency.
All PNG conversion tools →How to Convert
Upload your HDR
Click or drag and drop your HDR files. You can select up to 20 at once.
Adjust tone mapping
Fine‑tune exposure, contrast, and gamma to get the perfect look. Default settings work well for most HDR images.
Download PNG
Your converted PNG files are ready. Download individually or as ZIP. Files auto‑delete in 10 minutes.
When to Convert HDR to PNG
🎨 3D Rendering Previews
Quickly preview your HDR renders without specialized software. Share work-in-progress shots with clients or team members in a lossless format.
💡 Need HDR for editing? Try JPG to HDR →📸 High-End Photography
Convert HDR photos from your camera to PNG for further editing in any image editor that supports PNG.
💡 For web: PNG to JPG →🌐 Web Portfolios
Showcase your HDR-based artwork online with lossless quality. PNG is widely supported and preserves fine details.
💡 Smaller web version: PNG to WebP →💻 Lighting Simulation
Share results of lighting simulations in a lossless, universally readable format.
💡 For archiving: keep HDR →Format Comparison
| Format | HDR | PNG |
|---|---|---|
| Compression | Lossless | Lossless |
| Transparency | No | Yes |
| File Size | Larger | Larger |
Need to preserve the full dynamic range? Keep the original HDR file. For lossless 8‑bit sharing and editing, HDR to PNG is ideal. For smaller file sizes, try HDR to JPG (lossy).
💡 Pro Tips
- HDR images contain high dynamic range data. Our tone mapping converts this to a standard 8‑bit PNG that looks natural on any screen.
- Adjust exposure in advanced settings if the result is too dark or too bright.
- PNG is lossless, so no additional quality loss occurs during conversion. Always keep the original HDR for future adjustments.
- If your HDR is used for 3D rendering, you may want to keep the original for future compositing.
- Convert in batch mode — upload multiple HDRs and download all PNGs as a ZIP archive.
- We strip metadata by default for privacy, but you can keep EXIF by toggling the option before conversion (rare in HDR).
- For final delivery, always keep the original HDR master. Use PNG for previews and web sharing.
How HDR to PNG Conversion Works
HDR (Radiance) format stores pixel values as floating-point numbers, capturing a much wider range of light than standard 8‑bit images. This allows it to represent everything from deep shadows to bright highlights. PNG, by contrast, uses 8‑bit integers and is designed for standard dynamic range displays, but offers lossless compression.
When you convert HDR to PNG, we first decode the HDR data, then apply tone mapping — a process that compresses the high dynamic range into the limited range of a standard 8‑bit image while preserving visual detail and contrast. You can control this process with exposure, gamma, and contrast sliders in advanced settings.
The result is a lossless PNG file that faithfully represents your HDR image on any screen. All processing is done in memory, and your files are permanently deleted after 10 minutes.
HDR vs PNG: Key Differences
Dynamic range: HDR stores floating-point data with unlimited dynamic range; PNG is limited to 8‑bit standard range.
Use cases: HDR is used in 3D rendering, lighting simulation, and advanced photography; PNG is for sharing, web, and editing.
File size: HDR files can be large due to floating-point precision; PNG compresses losslessly, offering a balance between quality and size.
When to Convert HDR to PNG
Convert HDR to PNG when you need a lossless, universally compatible version of your HDR image for web portfolios, client previews, or further editing in standard image editors. PNG’s lossless nature ensures that the tone‑mapped result retains maximum quality.
For quick sharing where file size is critical, HDR to JPG is an alternative. Always keep the original HDR for future HDR‑based work.