100% Free No Upload Bulk Conversion

Bulk AVIF to HDR Converter — Free, No Upload

Convert multiple AVIF files to HDR instantly — all in your browser. No file limits, no watermarks, and completely private.

AVIF HDR  ·  ZIP
Bulk AVIF → HDR Converter
Select files, convert, download ZIP — all locally

Drop AVIF files here or click to browse

Supports batch selection — convert hundreds of files

AVIF → HDR ZIP
0 files
Converting 0 / 0
✓ Conversion completed! All files converted successfully. Click Download ZIP to save them.

Why convert AVIF to HDR?

The main issue with AVIF is incompatibility with most modern applications. Converting to HDR fixes this by providing perfect pixel preservation with smaller files. This conversion processes your files entirely in your browser using WebAssembly – no upload, no server, no privacy concerns. Perfect for sensitive or large batches.

Transparent areas will be filled with white background

Technical comparison: AVIF vs HDR

PropertyAVIFHDR
Full nameAV1 Image File FormatHigh Dynamic Range Image
Compression Lossy / Lossless Lossless
Color depth12-bit HDR32-bit float
Transparency Yes No
Web support Yes No
Developed byAlliance for Open Media (2019)Radiance / Greg Ward (1989)
Best for Next‑gen web images — superior compression High dynamic range photography

How to use — 3 simple steps

1
Select your AVIF files
Drag & drop or click to choose multiple AVIF images. No file size restrictions.
2
Start the conversion
Click "Convert to :to" — your files are processed locally using Canvas API. No upload, no waiting.
3
Download ZIP archive
All converted HDR files are bundled into a single ZIP. One click, everything saved.

Popular use cases for AVIF → HDR

Make your AVIF images viewable on any device – convert to HDR

Stop dealing with 'unsupported format' errors – use HDR instead of AVIF

Batch rename and convert your AVIF collection to HDR for a unified library

Improve your website's Google PageSpeed score by serving HDR images

💡 Pro tips

  • If your image has transparency, consider converting to PNG instead to preserve it
  • Use the ZIP download to get all converted files in a single click
  • All processing is private — files are never uploaded to any server

Frequently Asked Questions

HDR uses lossless compression. If lossy, at 85-92% quality the loss is imperceptible. If lossless, every pixel is preserved.
No artificial limit. Browser memory is the only constraint. Files up to 500 MB work well.
Yes. The bulk converter processes all selected files sequentially. Hundreds of files possible.
Yes. Everything happens locally in your browser via WebAssembly. Files never uploaded.
Application offline!