Why does my HDR image still look normal?

Almost always the screen. The effect needs a display with HDR headroom, which means a recent Mac, iPhone, or iPad. It also switches off in Low Power Mode, under some battery savers, and at very low screen brightness. Browsers differ too, so a preview can sit flat in one browser while the same file glows in another, and in the LinkedIn app. On a standard display the image simply looks like the original, which is the safe way to fail.

Does this actually work on LinkedIn?

Yes. LinkedIn re-compresses every image you upload, and most ways of making an HDR file do not survive that, which is why so many attempts at this look flat once posted. This tool writes the one version LinkedIn carries through its re-encoding intact, so the brightness is still in the file that reaches the feed. Instagram and Threads use a different HDR format that LinkedIn discards, so a file made for one is not guaranteed to work on the other.

Will everyone who sees my post see the glow?

No, and it is worth being realistic. Viewers on Windows, older Android phones, and any standard display see a completely normal image. The lift lands on Apple hardware and recent HDR laptops and monitors. Treat it as a bonus on a large slice of your audience, not something every reader gets.

Is my image uploaded to a server?

No. The whole conversion runs in your browser using your own device's processor. Your file is never sent anywhere, never stored, and never seen by us. Close the tab and it is gone.

Is using an HDR image against LinkedIn's rules?

No. The output is an ordinary image file using a standard colour space that has been supported for years, the same one HDR photos and video already use. There is no API trick and nothing is being exploited, your screen is just rendering the file exactly as it is labelled.

What size image should I use?

Any size. Anything longer than 2048 pixels on its longest edge is scaled down on export, which is still larger than LinkedIn shows in a feed, and it keeps the file sensible. Logos and graphics with flat colour work best, because the glow reads as deliberate rather than as an over-exposed photo.

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HDR image maker: make your logo glow on LinkedIn

The HDR image maker converts a logo or photo into a high dynamic range image that renders brighter than interface white on recent Mac, iPhone, and iPad screens, so your image stands out in a feed of flat ones. Pick the strength, download, and upload as normal. It runs in your browser and nothing is uploaded.

Choose an image or drop it herePNG or JPEG. Nothing is uploaded, the conversion runs on your device.

What is the HDR image maker?

An ordinary image tells a screen what fraction of its brightness to use, so pure white is only ever as bright as the interface already is. An HDR image names an absolute brightness instead, measured in nits, and modern displays hold spare headroom above interface white to render it. Tag an image that way and its bright areas light up well past the white of the page around them. That is why an HDR logo appears to glow in a LinkedIn feed while every other post sits flat. This tool rebuilds your image in the Rec.2100 PQ colour space and writes it in the one form LinkedIn carries through its own re-encoding, so the brightness is still there by the time anyone sees the post.

How to use it

1
Choose your image
Drop in a logo, headshot, or post graphic. Any ordinary image file works, PNG and JPEG included, and it never leaves your device.
2
Pick what glows
Highlights only lifts the bright parts, which keeps a white logo glowing on its normal background. Whole image lifts everything.
3
Set the strength
Drag the slider. Higher is brighter, and past about 12x most logos start to look blown out rather than premium.
4
Download and upload
Download the HDR image and upload it to LinkedIn the way you always would. Do not re-save it, edit it, or screenshot it first, any of those strips the effect.

Frequently asked questions

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