What a LinkedIn Profile Picture Needs to Be
A LinkedIn profile picture is a square image that LinkedIn displays as a circle. It must be at least 400 x 400 pixels, no larger than 7680 x 4320 pixels, and under 8MB. JPG and PNG both work.
The requirements are easy. The ones that earn the click are simpler. Your face should fill roughly 60% of the frame. The background should be plain, and lighter or darker than your face. Light should hit you from the front.
Then there’s the edge almost nobody uses: an HDR-encoded picture that glows brighter than the page around it. That’s the second half of this guide.
Source: LinkedIn Business.
LinkedIn Profile Picture Size, Format, and Limits
LinkedIn’s help documentation sets the accepted range. Anything outside it is rejected at upload, not resized quietly.
| Setting | What LinkedIn accepts | What we recommend |
|---|---|---|
| File type | JPG or PNG | JPG at quality 90 or higher |
| Minimum pixels | 400 x 400 | 1000 x 1000 |
| Maximum pixels | 7680 x 4320 | Nothing larger than 2000 x 2000 |
| Maximum file size | 8MB | Under 1MB after export |
| Aspect ratio | Square | 1:1, cropped tight to the head and shoulders |
| Display shape | Circle | Keep the face inside the circle, not near the corners |
Why 1000 x 1000 when 400 is allowed? LinkedIn renders your photo at different sizes across feed, search, and your profile. A 400-pixel file looks soft on a retina display. A 1000-pixel square has room to shrink and stays crisp.
Most phone photos land between 2MB and 6MB, upload fine, and get re-encoded anyway. You don’t gain anything from the weight.
How to Change Your LinkedIn Profile Picture
The upload path is the same on desktop and mobile.
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1Open your own profileOn desktop, click Me under your photo, then View profile. On mobile, tap your picture, then View profile.
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2Tap the camera icon on your photoThe camera sits on the photo itself. It’ll open upload, edit, and visibility options.
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3Upload the square exportChoose the 1000 x 1000 JPG you prepared. LinkedIn will auto-crop to a square, and it’s rarely where you want it.
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4Check the circle preview, then saveThe preview shows the circle crop. If your face is off-center, adjust before saving, then reload your profile.
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5Decide who sees itThe same menu controls photo visibility. For business use, public is the setting you want.
What Makes a Profile Picture Work at Feed Size
Most people judge a profile picture at 48 pixels wide. Design for that size and the full-size version takes care of itself.
Contrast beats quality. A sharp photo of a person in a beige shirt against a beige wall disappears. A slightly softer photo with clear separation between face and background wins the scroll. Dark background, light shirt, or the reverse.
Eyes in the top third. The circle crop puts the vertical center slightly above the middle of the square. Position your eyes there and the crop won’t feel accidental.
One focal point. Faces read fastest, and that’s why they win the feed. Logos work for company pages. A wide shot of you at a conference doesn’t, because at 48 pixels it becomes a grey rectangle.
A Profile Picture That Breaks Your Screen’s Brightness Ceiling
Scroll LinkedIn on a recent iPhone or MacBook and you’ll spot it. A logo or profile picture glows brighter than the page around it, brighter than your screen’s maximum white. As if it were lit from behind.
That’s not a design trick. It’s High Dynamic Range imaging, the tech behind HDR video on Netflix, applied to a static brand asset. Normal screen white sits near 203 nits. An HDR display pushes small areas to 1,000 nits and beyond, and browsers render that brightness inside a standard page.
Until recently, the method to make this survive LinkedIn’s upload pipeline wasn’t documented anywhere. So we reverse-engineered it. By the end you’ll know how to make your picture glow. You’ll also see why the obvious Photoshop workflow fails, and how to skip Photoshop entirely.
Four Terms That Make the Trick Make Sense
Nits. The unit of luminance. SDR reference white is treated as roughly 203 nits. HDR highlights on modern displays reach 1,000 to 2,000 nits.
Gain map. Adobe and Google’s approach to HDR photos, standardized as ISO 21496-1. It holds a normal image plus a hidden grayscale map that tells HDR displays how much to boost each area.
PQ. Perceptual Quantizer, standardized as SMPTE ST 2084 and used by HDR10 video. PQ values map to absolute nits, up to 10,000, rather than brightness relative to screen white.
ICC profile. A small block of metadata inside the image that tells software how to read its colors. This one turns out to be the hero of the story.
Prepare Your Image: Square, Flattened, True Whites
The output has to be a JPEG, so the source file needs to be ready before any conversion happens.
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1Use a square canvasLinkedIn recommends 400 x 400 for company logos, and any square size works because LinkedIn scales it down. The same applies to profile photos.
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2Flatten onto a solid backgroundNo transparency. Flatten everything onto your background color before exporting, because the output format can’t carry an alpha channel.
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3Check your whites with the eyedropperThe parts you want to glow should be near RGB 255, 255, 255. The boost targets the near-white range, so off-white greys glow less.
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4Save your master SDR fileJPEG or PNG at maximum quality. Every conversion below starts from that file.
The Photoshop HDR Export Everyone Tries First
Camera Raw has genuine HDR editing. Open the flattened logo, enable HDR with the toggle next to the histogram, and raise exposure on your whites by about +2 stops. Export as JPEG with HDR Output and Maximize Compatibility, quality 90 to 100, color space Display P3.
The result is a gain-map HDR JPEG. It’ll glow in Preview on an HDR screen, and even LinkedIn’s upload preview shows it.
Then you hit Save, LinkedIn processes the image, and the glow is gone. We tested this repeatedly. The export was correct every time and the upload still killed it.
Why Your Glow Dies in LinkedIn’s Pipeline
To find the failure, we pulled a live glowing logo straight from LinkedIn’s CDN. Then we inspected it byte by byte next to our own Camera Raw export.
Our export carried its HDR in two places. First, a second hidden image inside the file, stored via Multi-Picture Format. That’s the gain map. Second, an XMP metadata packet describing how to apply it. LinkedIn re-encodes every uploaded image, and in that re-encode both are discarded. The gain map doesn’t survive. That’s the entire failure.
The live glowing logo looked nothing like that. It was a plain, single-layer, 8-bit progressive JPEG. No gain map, no XMP. Its HDR lived in exactly one place: an embedded ICC profile named "Rec2020 Gamut with PQ Transfer."
That profile tells browsers to read the pixel values with the PQ transfer function in the Rec. 2020 gamut. The pixels themselves are PQ-encoded, so whites are written as absolute luminance of 800, 1,500, even 3,000 nits. ICC profiles are the one thing LinkedIn’s pipeline preserves through re-encoding, so the glow passes through untouched.
The HDR Format That Survives LinkedIn
The winning format is a color space conversion that Photoshop’s export dialogs don’t offer. Take the SDR image and boost only the near-white areas by about +2 stops. Convert the pixels from sRGB or Display P3 into Rec. 2020, then encode them with the PQ curve at an absolute luminance. The background keeps its normal brightness while the whites land near 800 nits. Save as a progressive JPEG with the Rec2020 PQ ICC profile embedded.
The elegant part is that this is progressive enhancement. On HDR screens the whites visibly exceed the interface white. On SDR screens the image looks completely normal, because any display that can’t render above-white simply clips it. Most of your audience sees zero downside.
Here’s what this looks like in practice. These are real files we converted and use on LinkedIn now.
A headshot with near-white areas works exactly like a logo. This photo got a +2 stop boost: the shirt and background exceed interface white on HDR displays while the face stays untouched.
Note what the boost does and doesn’t touch. The conversion ramps smoothly on relative luminance: pixels above roughly 55% white get boosted, everything below keeps its normal brightness. Antialiased edges blend cleanly instead of haloing, and dark or colored backgrounds stay exactly as designed.
Do It Without Photoshop (Free Tools)
Done by hand, that conversion is a page of color mathematics: gamut matrices, PQ transfer functions, ICC embedding. So it’s been automated.
Ihab Salha documented the reverse-engineering in The LinkedIn HDR Logo Trick, and the conversion is now a free, open-source skill called linkedin-hdr-logo. Hand it a square, flattened logo or headshot and you’ll get a finished progressive JPEG with the Rec2020 PQ ICC profile embedded. The default boost is +2 stops; ask for +3 for a stronger glow, or +3.9 as the ceiling.
All four examples above were made this way, with no Photoshop involved. The pipeline runs in seconds on a laptop. For deeper reading, see Ultra HDR and gain maps (ISO 21496-1) and the PQ transfer function (SMPTE ST 2084).
Verify the Glow and Keep It Tasteful
Open the file on any recent iPhone, iPad, MacBook, or OLED phone. The whites should visibly exceed the interface white. On an SDR screen it’ll look like a normal image, which is expected, not a failure.
Then upload it like any other picture. The ICC profile rides through re-encoding untouched.
A note on taste: it’s a spotlight, not a floodlight. Start at +2 for a subtle boost around 800 nits. Go to +3 for the well-known glowing-logo look. Treat +3.9, around 3,000 nits, as the practical maximum.
Is this a vanity hack? Partly. But your profile picture is the most-seen asset you own, so a detail this visible and rare is real differentiation. It pairs with the rest of the profile work that compounds. That means maximizing your profile’s visibility, telling a story with your profile, and turning that profile into a newsletter audience.
LinkedIn Profile Picture Questions, Answered
What size should a LinkedIn profile picture be?
At least 400 x 400 pixels and no more than 7680 x 4320, under 8MB. Export a 1000 x 1000 square so it stays sharp across feed, search, and profile views.
Why does my LinkedIn photo look blurry after upload?
LinkedIn re-encodes every upload. A file near the 400-pixel minimum has no detail left. Start from a sharp 1000-pixel square.
Can you use a PNG on LinkedIn?
Yes. JPG and PNG both upload. JPG is smaller and is the safe choice for photos. PNG is fine for logos with flat color, but the HDR method described here needs a JPEG output.
Does an HDR profile picture look broken on older screens?
No. A display that can’t render above-white clips those values. The image renders like a normal picture, with no artifacts and no washed-out areas.
Will LinkedIn remove the glow later?
It’s survived every re-encode we tested because the effect lives in the ICC profile, which LinkedIn keeps. If LinkedIn ever starts stripping profiles, the image degrades to a normal JPEG, not a broken one.
The Smallest Durable Differentiator on LinkedIn
Most people will never know why your profile picture looks different. They’ll just notice that it does. The glow is a quiet signal of craft, and on standard screens it has no downside at all.
The whole method in five lines: prepare a square, flattened image with true whites. Skip the gain-map export, because LinkedIn strips it. Encode the near-whites with the PQ curve. Embed a Rec. 2020 PQ ICC profile. Upload and let color management do the rest.
Then keep the basics honest. Correct size, a face that fills the circle, contrast against the background, and a picture that still reads at 48 pixels. The glow gets the second look. The fundamentals earn the first one.