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HDR Workbench

Examples

Radiance HDR Viewer and Tone Mapping Tool

Open .hdr files locally, inspect dynamic range, tune exposure and gamma, preview 2D or skybox images, and export HDR, PNG, or inspection JSON.

What This HDR Tool Covers

Use this page when the source is a Radiance .hdr image from lighting, rendering, lookdev, or panorama work. It keeps files in the browser, shows the practical range of the image, and gives you direct controls for tone mapping, HDR re-export, PNG preview, and inspection reports.

Supported HDR workflow scope

  • Input focus: Radiance .hdr sources used in rendering, lighting, panoramas, and image-based lighting workflows.
  • Output scope: HDR round-trip, mapped PNG preview, and JSON inspection report for handoff notes.
  • Best fit: tone mapping checks, dynamic-range inspection, equirectangular skybox preview, and browser-based HDR review.

When to use this tool

  • Open Radiance HDR files to inspect dynamic range and verify image content before conversion or delivery.
  • Tune exposure and tone mapping for SDR previews when HDR assets need human review.
  • Download an inspection JSON report when another teammate or downstream tool needs the exact file stats and preview settings.

Related tools

EXR Tool

Move to the EXR page when your HDR workflow includes OpenEXR files and channel inspection.

UltraHDR JPEG Tool

Use the UltraHDR page when the review target is gain-map based HDR delivery.

How To Open HDR Files Online

Read the HDR guide when the main question is browser-based tone mapping and preview of Radiance HDR files.

Capabilities

  • Load .hdr files and inspect scene-linear image data ranges.
  • Export processed results back to .hdr with dynamic range retained.
  • Adjust exposure, gamma, and tone mapping operators for preview and output.

Workflow

  1. Import HDR source and parse image metadata.
  2. Tune tone mapping parameters in linear color space.
  3. Export HDR output or mapped preview output.

FAQ

Can this tool export HDR again?

Yes. You can export a Radiance HDR file and choose whether the current exposure adjustment is baked into that HDR output.

Is tone mapping only for display?

Primarily yes. Tone mapping is used for SDR preview and export decisions.

Are files uploaded to a server?

No. HDR decoding, preview, export, and inspection report generation run in the local browser.