Make your logo glow brighter than white on HDR screens.

LinkedIn's image pipeline started stripping embedded ICC color profiles in September 2026. The glow lived entirely inside that profile, so without it the file renders as a normal image. Logos that were already uploaded went flat too, so re-uploading does not help. The same exported file still glows on your own website, in email clients that honor profiles, and in files opened directly on Mac and iPhone. Full record: what changed and what still works.

Superwhite is an HDR image tool at superwhite.app. It embeds a Rec.2100 PQ HDR profile into a JPEG so the whites render brighter than your screen's normal white on HDR displays. It was built for LinkedIn, which stripped the profile in September 2026; the glow still works on your own website, in email and anywhere the file arrives intact. Everything runs locally in your browser. It is not related to the older open source superwhite video demo on GitHub, which shows a bright white color using a small HDR video file.

Superwhite embeds a Rec.2100 PQ HDR color profile into your JPEG. On a screen with HDR turned on, the bright parts of the image use the display's extra brightness headroom, so they render brighter than normal white. It runs in your browser and nothing gets uploaded.

Some LinkedIn posts show images with whites that look like they're glowing on phones and HDR monitors. That came from an HDR color profile embedded in the JPEG. LinkedIn kept that profile through compression until September 2026, when it started stripping it, so the glow no longer shows there. Superwhite does the same embedding for surfaces that still pass the file through intact, such as your own website.

The glowing Wiz logo in the LinkedIn feed was a regular JPEG with an HDR color profile embedded, made with Superwhite. On HDR screens the white mark rendered brighter than the page around it, so it looked lit up while everything else stayed normal. LinkedIn began stripping that profile in September 2026, so it no longer glows there. High-contrast logos work best: a white mark on a colored background. Drop yours in above, export, and use the file where it arrives intact, such as your own website. Full story: why the Wiz logo glows on LinkedIn, the HDR glow trick explained.

The glow only shows up on HDR-capable displays with HDR turned on and battery saver off. Most recent phones qualify by default; plenty of laptops and older monitors don't, so the same file just looks like a normal photo there, slightly dimmer whites, nothing broken.

It works wherever the file is served without re-encoding: your own website, direct downloads, and email clients that honor embedded profiles. LinkedIn kept the profile until September 2026 and now strips it. Instagram and most other social platforms strip it too, or need a different HDR format (gain maps), which Superwhite doesn't support today. X, Threads and Bluesky are untested; results will be published as we get them.

Sign in with Google or email. Simple is €3 one time and unlocks unlimited logo exports up to 400px. Creator at €5 one time unlocks 1400px for web hero images and email headers, and Pro at €9 a month goes any size up to 3840px, though new Pro subscriptions are paused since 21 September 2026 while platforms are retested.

No. Screenshots, re-saving in an editor, and apps like WhatsApp or iMessage strip the color profile, which kills the effect. Serve the original file Superwhite gives you, and avoid any image CDN or build step that recompresses it.

There are two very different things called a glow. Most online glow tools paint a halo effect into the pixels, which shows on every screen and survives screenshots but just looks like editing. Superwhite does the other kind: it re-encodes your image with an HDR color profile so the bright parts emit real extra light on HDR screens. No painted halo, no filter, and it runs in your browser.

No prompt can produce it, because the glow is not in the pixels. It comes from a Rec.2100 PQ color profile embedded in the JPEG file itself, which image generators and editors don't output. The recipe is one step: drop your image in above, set the brightness, and serve the exported file unedited on a surface that keeps it intact.

Not the same way. Video pipelines on major platforms tone-map or clamp HDR brightness after creators abused it in short-form feeds. The image route worked differently: LinkedIn kept the ICC color profile in JPEGs through compression until September 2026, which is what Superwhite used. That route is now closed too, so neither images nor video glow on LinkedIn today.

Tagging an image with an HDR profile without touching the pixels boosts everything at once, including JPEG compression noise, which shows up as blotchy artifacts at HDR brightness. Superwhite remaps the pixels onto the PQ curve with a glow threshold you control, flattens near-white noise, and encodes with dithering and full-quality chroma, so the mark glows cleanly while the rest of the image stays put.

Superwhite is built and run by Nimrod Yarkoni, a solo founder in Amsterdam. It builds on the HDR profile technique first documented by Tom Nick. For updates and new examples, follow Superwhite on LinkedIn.