If your images look blurry, stretched, or cropped weirdly, you're losing engagement — fast. In 2026, social platforms have gotten even stricter about native resolutions. AI upscaling is now standard, but starting with the right pixel dimensions still gives you the sharpest results.
Below are the exact specs for every major platform — plus a pro tip: if you already have low-res images, use this free AI upscaler to rebuild detail without losing quality.
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Upload any image and get a 4K high-resolution version instantly. No signup required.
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