100% Free No Upload Bulk Conversion

Bulk PNG to HDR Converter — Free, Unlimited

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

PNG HDR · ZIP

Bulk PNG → HDR Converter

Select files, convert, download ZIP — all locally

Drop PNG files here or click to browse

Supports batch selection — convert hundreds of files

PNG → HDR ZIP

0 files

Converting 0 / 0

✓ Conversion completed! All files converted successfully. Click Download ZIP to save them.

Why convert PNG to HDR?

Compatibility, file size, and quality rarely align perfectly – HDR gets closer to that balance than PNG for High dynamic range photography. This conversion processes your files entirely in your browser using WebAssembly – no upload, no server, no privacy concerns. Perfect for sensitive or large batches. It's a minor step in your workflow with a noticeably smoother outcome.

Transparent areas will be filled with white background

Technical comparison: PNG vs HDR

Property	PNG	HDR
Full name	Portable Network Graphics	High Dynamic Range Image
Compression	Lossless	Lossless
Color depth	48-bit	32-bit float
Transparency	Yes	No
Web support	Yes	No
Developed by	PNG Development Group (1996)	Radiance / Greg Ward (1989)
Max colors	16.7M+	floating point
MIME type	`image/png`	`image/vnd.radiance`
Category	Raster image	Raster image
Year gap	7 years apart in technical development
Best for	Web graphics with transparency	High dynamic range photography
Estimated size change	Typically 10%-20% smaller

How to use — 3 simple steps

Select your PNG files

Drag & drop or click to choose multiple PNG 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 PNG → HDR

Etsy and Amazon sellers converting PNG product shots to HDR for listings

Interior designers converting PNG renders to HDR for client presentations

Fitness coaches converting PNG progress photos to HDR for their app

Recipe bloggers converting PNG food photography to HDR for faster pages

💡 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

The current version processes the batch in one continuous run; for very large batches, splitting into smaller groups is recommended.

Yes, you can drag a folder or multiple PNG files directly onto the drop zone.

Yes, once the page and its WebAssembly modules are loaded, conversion works without an active internet connection.

HDR is well suited for archival when its compression matches your quality needs — lossless HDR is ideal for long-term storage.

Bulk PNG to HDR Converter — Free, Unlimited

Why convert PNG to HDR?

Technical comparison: PNG vs HDR

How to use — 3 simple steps

Popular use cases for PNG → HDR

💡 Pro tips

Frequently Asked Questions

Can I pause and resume a large PNG to HDR batch?

Does the tool support drag-and-drop for PNG files?

Will converting PNG to HDR work offline after the page loads?

Can I trust HDR for long-term archival of my PNG images?

Other conversions from PNG

Convert other formats to HDR

Related conversions