HDRLogoGlow vs Superwhite: which HDR glow tool should you use
HDRLogoGlow launched in late August 2026 as a free, browser-based HDR glow tool and published a page comparing itself to Superwhite. This is the comparison from the other side. It is written by the person who runs Superwhite, so read it with that in mind, and check the other tool yourself. Where HDRLogoGlow is ahead, it says so.
Short version. HDRLogoGlow is free, can glow any colour or a selected region, and ships two useful side tools. Superwhite is paid, white-focused, has a longer production track record on LinkedIn including paid ads, does more to the pixels before encoding, and has batch and presets for teams. If cost decides it, use HDRLogoGlow. If output quality on a white mark or a repeat workflow decides it, use Superwhite.
Feature by feature
| Capability | Superwhite | HDRLogoGlow | Note |
|---|---|---|---|
| White HDR glow on LinkedIn | Yes | Yes | Both export a JPEG with a Rec.2100 PQ ICC profile, the route that survives LinkedIn. |
| Glow threshold control | Yes | Yes, via auto white detection | Superwhite exposes the luminance cut-off directly. |
| Any-colour glow | No | Yes | Genuine HDRLogoGlow advantage. Note saturated colours have a hard ceiling in Rec.2020, blue especially. |
| Region selection | No | Yes | Glow one object rather than every pixel of that colour. |
| Near-white flattening ramp | Yes | Not advertised | Prevents invisible JPEG noise being amplified into visible grain by the boost. |
| Dithering in PQ code space | Yes | Not advertised | Prevents banding at the top of the PQ curve. |
| 4:4:4 chroma at quality 97 | Yes | Not advertised | Keeps coloured edges crisp against a glowing white through LinkedIn's re-encode. |
| LinkedIn Sponsored Content verified | Yes | No, their page says untested | Superwhite confirmed the profile survives the paid ad path. |
| HDR PNG (cICP) export | No | Yes | Useful for pages you host yourself. Does not survive any platform re-encode. |
| Output verification scan | No | Yes | They read each export back and check the signalling. |
| Batch export | Pro | No | Their comparison page lists this as a gap. |
| Saved brand presets | Pro | No | Same. |
| HDR display test page | No | Yes | Handy. |
| Named production logos | Wiz, Taboola, Port, Lusha, DoiT, Prime Security | Shows brands already glowing on LinkedIn | Their examples page lists brands whose logos are encoded as HDR, including Taboola, whose glow Superwhite documented in August. |
| Runs in the browser, nothing uploaded | Yes | Yes | Same on both. |
| Price | €3 once to 400px, €5 once to 1400px, €9/mo to 3840px | Free | No account or watermark on either. |
Where HDRLogoGlow is better
It is free, and for a one-off company logo that may be the whole decision. Any-colour and region selection are real capabilities Superwhite does not have. The colour limit calculator and the HDR display test are well made side tools. The standards write-up on their pages is careful, with ITU and SMPTE references, and their "last verified" dates are a good habit.
Where Superwhite is better
Every tool in this category tags the file. The difference is what happens to the pixels before the tag, and that is where Superwhite has put its work. Near-white JPEG noise, which is invisible in SDR, becomes grain at 1,600 nits unless it is flattened first. Smooth areas band at the top of the PQ curve unless they are dithered. Coloured edges smear against a glowing white unless chroma is written at full resolution. Superwhite does all three by default. HDRLogoGlow's public material does not mention any of them, which does not mean they are absent, only that we could not verify them.
Superwhite has also spent longer in production on LinkedIn specifically. It made the Wiz logo that started the trend, verified that the ICC profile survives the Sponsored Content pipeline and not only organic posts, and documented why HDR video does not survive at all despite the composer preview suggesting it does. HDRLogoGlow's LinkedIn page says its ad path is untested.
Finally, batch export and saved presets. If you are an agency doing this for clients every week, those two features are the workflow, and they are the reason Pro exists.
A note on their Superwhite alternative page
Their comparison lists Superwhite as "not advertised" for any-colour selection, region selection and output verification. That is accurate. It lists batch processing and saved presets as Superwhite advantages. Also accurate. It lists Superwhite's price as "check their site", so here it is: €3 one time for unlimited 400px exports, €5 one time to 1400px, €9 a month to 3840px with batch and presets. Nothing on Superwhite is free.
Which one to use
- One white logo, cost matters most: HDRLogoGlow, or any of the free tools in the wider comparison.
- You want a brand colour or a single region to glow: HDRLogoGlow. Superwhite does not do this.
- A white mark where the result has to look clean at 1,600 nits, or a full-size post or ad: Superwhite.
- Paid LinkedIn ads: Superwhite, because the ad path is verified.
- Many brands, repeatedly: Superwhite Pro for batch and presets.
Frequently asked questions
Is HDRLogoGlow free?
Yes. HDRLogoGlow is free with no account, no watermark and no export limit, according to its own pages. Superwhite is paid: 3 euro one time to 400px, 5 euro one time to 1400px, 9 euro a month to 3840px.
Do HDRLogoGlow and Superwhite produce the same kind of file for LinkedIn?
Both export a JPEG carrying a Rec.2100 PQ ICC profile, which is the only HDR signalling LinkedIn preserves. They differ in what is done to the pixels before encoding: Superwhite applies a near-white flattening ramp, dithering in PQ code space and 4:4:4 chroma at quality 97. HDRLogoGlow's public material does not describe equivalent steps.
Can Superwhite glow colours other than white?
No. Superwhite is built around the white and near-white case with a glow threshold. HDRLogoGlow can glow any colour or a selected region, which is its main functional advantage.
Which tool works for LinkedIn ads?
Superwhite verified that the ICC profile survives LinkedIn's Sponsored Content pipeline. HDRLogoGlow's LinkedIn page states its ad path has not been verified end to end.
Which tool has batch export and presets?
Superwhite Pro. HDRLogoGlow lists both as not yet available on its own comparison page.