Convert WEBP to HDR

Convert WEBP files to HDR locally, completely free and with maximum privacy.

Drag and drop your files here

or click to browse local files (large files supported, limited only by browser RAM)

Upload Files

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How to convert WEBP to HDR

  1. Drop your .webp files above, or click Upload Files. You can add many files at once.
  2. HDR is already selected as the output. Open the settings (gear icon) to fine-tune the result.
  3. Click Convert All. ImageMagick runs inside your browser through WebAssembly; nothing is uploaded.
  4. Download your .hdr files as soon as each one finishes.

What to know about WEBP to HDR conversion

  • HDR has no transparency, so transparent areas of the WEBP are filled with white.
  • HDR cannot store animation, so only the first frame of an animated WEBP is converted.
  • HDR is best for HDR environment maps for lighting 3D scenes, and opens in Blender, 3D renderers and HDR viewers.

WEBP vs HDR

FeatureWEBP (Web Picture Format)HDR (Radiance HDR)
Compressionlossy or losslesslossless
TransparencyYesNo
AnimationYesNo
Best forfast-loading images on websitesHDR environment maps for lighting 3D scenes
Opens inall modern browsers and most image editorsBlender, 3D renderers and HDR viewers

WEBP (Web Picture Format): A modern image format by Google offering superior lossless and lossy compression for web images.

HDR (Radiance HDR): A high-dynamic-range RGBE image format commonly used for environment maps and lighting in 3D rendering.

Conversion options

  • Resize by width, height or both (aspect ratio is preserved)
  • Filters: grayscale, sepia, blur and sharpen
  • Custom output file name

Frequently asked questions

Is it safe to convert WEBP to HDR here?

Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.

Is there a file size limit?

There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.

Can I convert several WEBP files at once?

Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.

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