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

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✓ 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

Property	AVIF	HDR
Full name	AV1 Image File Format	High Dynamic Range Image
Compression	Lossy / Lossless	Lossless
Color depth	12-bit HDR	32-bit float
Transparency	Yes	No
Web support	Yes	No
Developed by	Alliance 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

Select your AVIF files

Drag & drop or click to choose multiple AVIF images. No file size restrictions.

Start the conversion

Click "Convert to :to" — your files are processed locally using Canvas API. No upload, no waiting.

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.

Bulk AVIF to HDR Converter — Free, No Upload

Why convert AVIF to HDR?

Technical comparison: AVIF vs HDR

How to use — 3 simple steps

Popular use cases for AVIF → HDR

💡 Pro tips

Frequently Asked Questions

Does converting from AVIF to HDR lose image quality?

What's the maximum file size I can convert from AVIF to HDR?

Can I convert multiple AVIF files to HDR at once?

Is my data safe when using this online converter?

Other conversions from AVIF

Convert other formats to HDR