TikTok's interface often shows an account image in a compact space. Choose a portrait or symbol that makes sense before someone opens the profile. A whole group, a detailed poster, or a long slogan may become a coloured blur at that size. Use a simple image that remains connected to the name and content of the account.
The 400×400 output here is our square preparation preset, not a claim that TikTok requires that exact size. Check the controls in your account when adding the image. This page prepares a static photo or graphic and does not create a profile video or alter any animated account feature.
Leave space around the face or mark for a rounded presentation. A crop that places the eyes or the logo at the absolute edge may look fine as a square file but feel cramped in the interface. A strong silhouette and a deliberate background are more useful than trying to preserve every small detail from the original photograph.