Radiance HDR (.hdr) carries the full dynamic range your renderer or panorama camera captured. Resize HDR images without flattening that range — the 32-bit float pipeline keeps every stop of luminance intact.
or drag and drop your image here
Supports JPG, JPEG, PNG, WEBP, SVG, GIF, HEIC, HEIF, AVIF, BMP, TIFF, HDR, JP2, RAF, PSD
Drop a Radiance RGBE-encoded .hdr file from any source — DSLR brackets, Poly Haven, custom panorama capture, or render output.
The resize math runs on 32-bit float pixel data, never quantizing to 8-bit during the resample. Highlights past 1.0 luminance stay intact, no clipping introduced by the resize step.
Output re-encodes back to Radiance RGBE with shared exponent — full dynamic range preserved, file size scaled by pixel count.
Convert images between these related converters
Standard image tools resize HDR by quantizing to 8-bit, resampling, then guessing the float values back. The result: clipped highlights, banded skies, lost shadow detail. Proper HDR resize keeps the math in float the entire way.
no quantization during resample
sharp edges, preserved luminance
standard format every renderer reads
HDRI panoramas drive image-based lighting in modern 3D — a single 32-bit float environment map replaces a complex light rig. Source HDRIs ship at 8K, 16K, even 32K. Most production work uses 2K–4K. Resize correctly and you keep the lighting fidelity while cutting RAM and disk by 4–16×.
Float pipelines, RGBE encoding, and 3D workflow specifics.
