HDR Converter

Converts HDR images to SDR by applying tone mapping and exposure adjustments for consistent web and print results.

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About This Tool

The tool converts high dynamic range imagery to standard dynamic range by applying selected tone-mapping operators and exposure controls to preserve essential scene detail. It supports common HDR input formats (EXR, HDR TIFF, Radiance HDR) and outputs SDR images suitable for web and print. Conceptually, the pipeline maps radiance data to display values, with optional local adaptation to protect highlights and shadows. Users benefit from predictable results, repeatable color handling, and streamlined publishing workflows. Core features include multiple tone-mapping options (global and local), exposure adjustments, gamma correction, color space conversion, and choice of output format. The system maintains color-managed processing where possible, and can queue multiple files for batch processing using the same settings. The tool is intended for photographers, retouchers, and publishers who require consistent SDR results without extensive manual post-processing. Use cases include preparing a scene-balanced image for a magazine feature, web gallery, or portfolio, where accurate highlight recovery and shadow detail are critical. Unique value lies in combining a minimal input surface with a choice of established tone-mapping operators and straightforward exposure controls to deliver reliable SDR results across varied scenes.

How to Use

  1. Provide inputs: Upload HDR image file and set output format.
  2. Choose tone-mapping operator and exposure in stops.
  3. Adjust gamma and color space if needed.
  4. Run conversion and review the SDR result.
  5. Download, rename, or queue for batch processing.
How to use online hdr converter

Frequently Asked Questions

Find Quick Answers

What input formats are supported?
Supported HDR inputs include EXR, HDR TIFF, and Radiance HDR. If an HDR file is not provided, the tool will reject the input and request a valid HDR image with radiance data for accurate tonemapping.
What output formats are available?
Outputs are delivered as JPEG, PNG, or TIFF SDR images. Users can select 8-bit or 16-bit per channel encoding and specify the target color space (default is sRGB).
How does exposure affect results?
Exposure controls the global scene brightness by scaling radiance before tonemapping. Higher exposure brightens mid-tones and highlights, while lower exposure preserves more detail in shadows; tone-mapping then compresses dynamic range to fit SDR.
Can I batch process HDR files?
Yes, the tool supports batch processing. You can queue multiple HDR images, apply the same operator, exposure, and gamma settings, and obtain a set of SDR outputs with sequential filenames.

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