HDR photo converter
Beta: turn a photo into an Ultra HDR JPEG that lifts highlights on HDR screens. It runs on your device and uploads nothing.
An Ultra HDR file is a normal JPEG with a second, small grey picture stored behind it. That picture, called a gain map, tells HDR-capable phones and screens where to be brighter. Add a photo and this tool builds the map from the photo's own bright areas and saves one file. This is a beta: an ordinary photo has no real HDR data, so the effect is a lift in the highlights, and it shows only on screens and in apps that support Ultra HDR.
How it works
- Add a photo by dropping, pasting or choosing it.
- Pick the HDR strength and check the preview. The HDR view appears only if your screen supports it.
- Download the Ultra HDR JPEG and open it on the device or in the app where you want to use it.
What happens to your data
- Your photo is converted by your browser. It is not uploaded to Revault or anywhere else.
- The saved file is new, so camera data in the original, such as location, date and device, is not copied into it.
- This page keeps nothing. Close or reload it and your photo is gone.
Limits to know about
- Beta. A normal photo has no real HDR information, so this only brightens the highlights on HDR-capable screens. Everywhere else the file looks like the normal photo.
- Support differs by device, browser and app, and some apps remove the HDR layer when they re-save or share a photo. Test the file where you plan to use it.
Frequently asked questions
What is an Ultra HDR JPEG?
It is a normal JPEG with a smaller grey picture, the gain map, stored after it, plus a little data that says how to use it. Apps that do not know about it show the normal photo. Apps that do know brighten the highlights on screens that can show more light.
Which devices and apps can show it?
Recent Android phones, Chrome on a computer with an HDR display, and a growing number of galleries and editors. Support changes often, so test your file instead of relying on a list.
Does this make my photo real HDR?
No. Real HDR comes from a camera that records more light than a normal photo can hold. This tool adds a synthetic highlight boost to an ordinary photo, so you get brighter highlights, not extra detail.