Guide
Convert an opaque JPG, PNG, or WebP into a backward-compatible Ultra HDR JPEG, or turn an Ultra HDR JPEG back into a plain SDR image. Both directions are verified locally.
Clear answers
Convert an opaque JPG, PNG, or WebP into a backward-compatible Ultra HDR JPEG, or turn an Ultra HDR JPEG back into a plain SDR image. Both directions are verified locally.
It keeps a normal SDR JPEG as the fallback, adds a smaller JPEG gain map, and includes the metadata and MPF index that compatible HDR viewers use to show brighter highlights.
Yes. The converter uses the stored SDR base rendition, re-encodes it as a plain JPEG, and verifies that the result no longer declares a gain map.
No. Readers without gain-map support display the ordinary SDR fallback. HDR appearance also depends on the display, operating system, viewer, brightness, and any later re-encoding.
A local check
Convert an opaque JPG, PNG, or WebP into a backward-compatible Ultra HDR JPEG, or turn an Ultra HDR JPEG back into a plain SDR image. Both directions are verified locally.
Selected file
Choose one opaque still JPG, PNG, WebP, or Ultra HDR JPEG.
Review before sharing
For an SDR source, select Natural, Glow, or Graphic highlight response; Ultra HDR sources are automatically prepared for SDR output.
Local verification
Create the JPEG and wait while its container and embedded images are checked locally.
Download the verified Ultra HDR or plain SDR JPEG.
Four local steps
Choose one opaque still JPG, PNG, WebP, or Ultra HDR JPEG.
For an SDR source, select Natural, Glow, or Graphic highlight response; Ultra HDR sources are automatically prepared for SDR output.
Create the JPEG and wait while its container and embedded images are checked locally.
Download the verified Ultra HDR or plain SDR JPEG.
Browser privacy
It keeps a normal SDR JPEG as the fallback, adds a smaller JPEG gain map, and includes the metadata and MPF index that compatible HDR viewers use to show brighter highlights.
Yes. The converter uses the stored SDR base rendition, re-encodes it as a plain JPEG, and verifies that the result no longer declares a gain map.
No. Readers without gain-map support display the ordinary SDR fallback. HDR appearance also depends on the display, operating system, viewer, brightness, and any later re-encoding.
Clear answers
No. Readers without gain-map support display the ordinary SDR fallback. HDR appearance also depends on the display, operating system, viewer, brightness, and any later re-encoding.
Private workspace
Create or remove an HDR gain map without uploading the image, then download only after the new JPEG passes local structural and image checks.