HDR to PNG Converter

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Remote Processing

The heavy lifting happens on Convertio's servers. Your computer or phone stays unburdened while HDR converts to PNG in the cloud.

Faithful Rendering

HDR imagery converts to PNG with careful attention to color and detail. The output faithfully represents the source material.

Secure Processing

Your HDR file is deleted right after conversion. The PNG output is purged from servers within 24 hours — your data stays private.

How to convert HDR to PNG

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose png or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your png file right afterwards

About formats

HDR (also known as RGBE or Radiance HDR) is a high-dynamic-range image format created by Greg Ward Larson as part of the Radiance lighting simulation system, developed at Lawrence Berkeley National Laboratory starting in 1985 with the HDR format emerging around 1989. The format stores floating-point RGB pixel values using a compact 32-bit-per-pixel encoding called RGBE (Red, Green, Blue, Exponent): three 8-bit mantissa bytes share a single 8-bit exponent, representing luminance values across a range of roughly 76 orders of magnitude while keeping file sizes comparable to standard 24-bit images. HDR files begin with a text header containing rendering and exposure metadata, followed by the RGBE pixel data compressed with a scanline-oriented run-length encoding scheme. The format captures the full luminance range of real-world scenes — from deep shadows to direct sunlight — enabling physically accurate lighting calculations, tone mapping to different display conditions, and post-capture exposure adjustment without the clipping artifacts inherent in 8-bit formats. One advantage is the format's foundational role in HDR imaging: Radiance HDR pioneered the concept of storing real-world luminance values in image files, and the .hdr format became the standard for light probe images and environment maps used in image-based lighting across the 3D rendering industry. The format's compact encoding is another practical strength — the RGBE scheme provides far more dynamic range than 8-bit formats while using only 33% more storage per pixel, a favorable tradeoff that made HDR practical on storage-limited systems of the late 1980s. HDR files are supported by Photoshop, GIMP, ImageMagick, Blender, and all major 3D renderers.
Developer: Greg Ward Larson
Initial release: 1989
PNG (Portable Network Graphics) is a lossless raster image format developed by the PNG Development Group and published as a W3C Recommendation on October 1, 1996, created as a patent-free replacement for GIF after the Unisys LZW patent controversy. PNG uses a two-stage compression pipeline: a prediction filter selects the optimal per-row preprocessing (none, sub, up, average, or Paeth), then DEFLATE compression encodes the filtered data. The format supports rich color modes — 1/2/4/8/16-bit grayscale, 8/16-bit per channel true color, and indexed color with palettes up to 256 entries — all with optional alpha transparency ranging from a single transparent color to a full per-pixel alpha channel with 256 or 65536 levels. PNG also stores gamma correction, ICC color profiles, text metadata, and suggested background color. One advantage is lossless compression with transparency — PNG preserves every pixel exactly while supporting smooth semi-transparent edges, making it the standard format for web graphics, UI elements, logos, screenshots, and any image where artifacts or color shifts are unacceptable. Universal support is another core strength: every web browser, operating system, image editor, and programming library handles PNG natively. The format has proven remarkably durable — after nearly three decades, PNG remains the default lossless web image format. While newer formats like WebP and AVIF offer better compression, PNG's combination of lossless quality, full transparency, and absolute ubiquity keeps it indispensable.
Initial release: October 1, 1996

Frequently Asked Questions

Why convert HDR to PNG?

Radiance HDR files are for 3D lighting, not general viewing. PNG conversion produces an accessible preview version.

What programs open PNG files?

Any browser, Photoshop, GIMP, Paint, Preview, and virtually every image viewer on Windows, macOS, Linux, iOS, and Android

Can I batch convert multiple HDR files to PNG?

Upload several HDR files at once. Each one converts to PNG independently — download them individually or together when all are done.

Are colors preserved in the HDR to PNG conversion?

HDR stores extended dynamic range data. Converting to PNG maps that range into the displayable gamut while retaining visual accuracy.

Is tonemapping applied during conversion?

When converting Radiance HDR luminance data to a displayable format like PNG, tonemapping maps the full range into visible output.

Does this converter work on mobile devices?

Absolutely. The browser-based converter runs on phones and tablets — iOS, Android, or any device with a modern browser handles it fine.

HDR to PNG Quality Rating

4.4 (1,124 votes)
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