Drop an image, get it at exactly 1280×720 pixels (16:9) under 2 MB — the classic YouTube thumbnail spec, accepted everywhere thumbnails are. Nothing is uploaded; it runs in your browser.
1280×720 at 16:9 is the long-standing YouTube thumbnail spec, and it's still the baseline every guide agrees on. The limits above it have loosened: YouTube now recommends resolutions up to 3840×2160 and accepts up to 50 MB when uploading from desktop, while mobile video-thumbnail uploads still enforce the old 2 MB cap. This page presets the combination that works in every mode — exactly 1280×720, under 2 MB — which is also what most other video platforms and embeds expect. If you're uploading 4K thumbnails from desktop, the 3840×2160 page presets that instead.
If your source isn't 16:9, PixFit center cover-crops it — fills the full 1280×720 frame and trims the overflow, rather than squashing or letterboxing. For a thumbnail with text or a face near the edge, that trim can matter: compose your source roughly 16:9 first, then use this page for the exact pixels and the size guarantee.
YouTube accepts both. At 1280×720 the 2 MB budget is huge — expect maximum quality with no visible compression either way. Where the format choice bites is fine text and sharp edges: WebP tends to keep hard edges cleaner at the same size. Full-HD wallpapers and banners are the sibling page: 1920×1080.