How to test your profile picture
- Add your photo. Pick it, drop it or paste it. Add up to four to compare them. No photo at hand? Try the sample.
- Fix the crop. Drag the photo inside the circle, zoom in or out, rotate it. For a logo, zoom out and pick a background colour so it has room around it.
- Remove the background, if you like. One click cuts you out of the photo; then pick a colour, a gradient or your own photo blurred behind you. It runs in your browser and works best on photos of people.
- Look at every app. Each one shows your picture at its own sizes: the profile, a post, a comment, a story, the chat list. Switch between light, dark, or both side by side.
- Compare. Put your photos next to each other from 128 px down to 24 px and choose the one you still recognise at the smallest size.
- Download it. One 1080 × 1080 PNG, or a ZIP with each platform’s size. Then use it in every profile preview, or on your slides.
Nothing is uploaded: your photos are read on your device and kept in this browser, so they’re still here when you come back.
What makes a good profile picture
- Your face fills the circle. Head and shoulders, with your eyes a little above the middle. Most of the time it’s shown smaller than a fingernail.
- It stands out from the page. A background close to white disappears in light mode, one close to black in dark mode. A coloured background or a thin border fixes both.
- It works at 24 px. In comments and chat lists the picture is tiny. Simple shapes and strong contrast survive; small details don’t.
- Nothing important in the corners. Every app cuts the square into a circle (Slack into a rounded square), so the corners never show.
- The same picture everywhere. People recognise you across apps faster when the photo is the same.
What the checks look at
“Is this a good profile picture?” reads the picture itself, as cropped:
- Size: how many pixels the crop really has. Under 320 px it looks soft on today’s phones.
- The edge of the circle: almost white or almost black, so it melts into the page in light or dark mode.
- Contrast: a picture that is nearly one flat colour, or a face the same tone as the background, turns into a blur at small sizes.
- Brightness: very dark or very bright pictures lose their details when small.
- The corners: detail the circle cuts off.
- Transparency: a transparent PNG gets a white or black background from the app; pick your own instead.
Profile picture sizes (2026)
| Platform | Upload at least | Shape |
|---|---|---|
| 320 × 320 px | Circle | |
| TikTok | 200 × 200 px | Circle |
| 400 × 400 px | Circle | |
| X (Twitter) | 400 × 400 px | Circle |
| YouTube | 800 × 800 px | Circle |
| 320 × 320 px | Circle | |
| Slack | Square | Rounded square |
Start from a square photo bigger than the largest size you need: the ZIP download makes every size from it.
PFP tester, checker, preview or simulator?
People call it different names for the same job. A PFP preview shows your picture before you upload it; a PFP checker looks for problems like a bad crop or low contrast; a PFP simulator shows it inside an app’s layout. This tester does all three, for every app at once.
What’s free, and what the app adds
The tester is free, with no account and no limit. Once you have the right picture, aiCarousels puts it on your posts: every carousel you make carries your photo and name in its signature, so people know who it’s from. “Use it on my slides” opens the app with the photo already there.
